Transcript A 10 V emf battery is connected in series with the

A 10 V emf battery is connected in series with the following: a
2 microfarad capacitor, a 2 ohm resistor, an ammeter, and a switch,
initially open; a voltmeter is connected in parallel across the
capacitor. After the switch has been closed for a relatively long
period (several seconds, say), what are the current and capacitor
voltage readings, respectively?
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2.
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zero A, 10 V
zero A, zero V
5 A, zero V
5 A, 10 V
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The following three appliances are connected to a 120
volt house circuit: i) toaster, 1200 W, ii) coffee pot, 750
W, and iii) microwave, 600 W. If all were operated at the
same time what total current would they draw?
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2.
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3A
5A
10 A
21 A
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A 10 V emf battery is connected in series with the following: a 2
microfarad capacitor, a 2 ohm resistor, an ammeter, and a switch,
initially open; a voltmeter is connected in parallel across the
capacitor. At the instant the switch is closed, what are the current
and capacitor voltage readings, respectively?
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2.
3.
4.
zero A, 10 V
zero A, zero V
5 A, zero V
5 A, 10 V
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A battery with an emf of 6.3 V is connected in series
with a resistor of 2.0 ohms. What is the total power
delivered by the battery to the circuit?
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2.
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22.0 W
20.0 W
12.6 W
25.2 W
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A battery with an emf of 6.3 V is connected
across the ends of an external resistor of 2
ohms. What is the current through the resistor?
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2.
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4.
12.6 A
6.3 A
3.15 A
5.3 A
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Three resistors having values of 4.0, 6.0
and 8.0 ohms, are connected in series.
What is their equivalent resistance?
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18.0 ohms
8.0 ohms
6.0 ohms
1.8 ohms
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Three resistors having values of 4.0, 6.0
and 10.0 ohms, are connected in parallel.
What is their equivalent resistance?
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20.0 ohms
7.3 ohms
6.0 ohms
1.9 ohms
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Three resistors connected in parallel have individual
values of 4.0, 6.0 and 10.0 ohms, respectively. If this
circuit is connected to a 12.0 V battery what is the
current in the 10 ohm resistor?
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0.55 A
5.2 A
1.2 A
2.0 A
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Three resistors connected in parallel have individual values
of 4.0, 6.0 and 10.0 ohms, respectively. If this combination is
connected in series with a 12.0 V battery and a 2.0 ohm
resistor, what is the current in the 10 ohm resistor?
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2.
3.
4.
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0.59 A
1.0 A
11.2 A
16.0 A
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Consider the circuit shown in the figure.
What power is dissipated by the entire
circuit?
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14 W
28 W
56 W
112 W
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If I = 2.0 mA and the potential difference, VA - VB= +30
V in the circuit segment shown, determine the charge
and polarity of the capacitor.
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1.5 mC, left plate is positive
1.5 mC, right plate is positive
0.50 mC, left plate is positive
0.50 mC, right plate is positive
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A series RC circuit has a time constant of 1.0 s. The battery
has a voltage of 50 V and the maximum current just after
closing the switch is 500 mA. The capacitor is initially
uncharged. What is the charge on the capacitor 2.0 s after the
switch is closed?
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0.43 C
0.66 C
0.86 C
0.99 C
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A voltage source of 10 V is connected to a series 2 C
circuit where R = 2 x 106 W and C = 3 µ F. Find the
time required for the current in the circuit to decay to 5%
of its original value.
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2.
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4.
3s
6s
9s
18 s
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In the circuit segment shown, I = 20 mA
and Q = 50 µ C. What is the potential
difference, VA - VB ?
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25% 25% 25% 25%
-40 V
+40 V
+20 V
-20 V
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If E = 20 V, at what rate is thermal energy
being generated in the 20 W resistor?
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25% 25% 25% 25%
6.5 W
1.6 W
15 W
26 W
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If E = 24 V, at what rate is thermal energy
generated in the 5 W resistor?
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13 W
3.2 W
23 W
39 W
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If E = 9.0 V, what is the current in the 15W resistor?
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0.20 A
0.30 A
0.10 A
0.26 A
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In a circuit, a current of 1.0 A is drawn from a battery. The current
then divides and passes through two resistors in parallel. One of
the resistors has a value of 64 W and the current through it is 0.2
A. What is the value of the other resistor?
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8W
16 W
24 W
32 W
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Four 1.5 volt AA batteries in series are used to power a
transistor radio. If the batteries hold a total charge of
240 C, how long will they last if the radio has a
resistance of 200 W?
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2.
3.
4.
1.1 hours
2.2 hours
4.1 hours
13 hours
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What is the maximum number of 100 Watt lightbulbs
you can connect in parallel in a 120 V home circuit
without tripping the 20 A circuit breaker?
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2.
3.
4.
11
17
23
29
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An electric heater draws 1300 W, a toaster draws 1000
W, and an electric oven draws 1540 W. If all three of
these appliances are operating in parallel on a 120 V
circuit, what is the total current draw?
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2.
3.
4.
23.4 A
31.7 A
39.9 A
47.7 A
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40
How much power is being given off by
one of the 10 ohm resistors?
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2.
3.
4.
24.0 W
9.6 W
16.0 W
6.4 W
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What is the current flowing through the 2
ohm resistor?
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4.
2A
3A
4A
6A
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What is the current flowing through the 8
ohm resistor?
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1A
2A
3A
6A
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What is the equivalent resistance for
these resistors?
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2.
3.
4.
2.3 ohms
5.2 ohms
13 ohms
22 ohms
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What is the equivalent resistance for
these resistors?
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2.
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4.
25% 25% 25% 25%
1.33 ohms
2.25 ohms
3.0 ohms
7.5 ohms
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What is the potential difference between
point a and b ?
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2.
3.
4.
6V
8V
12 V
24 V
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How much current is flowing in one of the
10 ohm resistors?
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2.
3.
4.
0.8 A
2.0 A
1.6 A
2.4 A
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Consider the wheatstone bridge circuit. R3 = 4W and
the ratio R2 /R4 = 3 and the galvanometer reads zero
current. If the current in R3 = 0.50 A, what is the current
in R1 ?
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2.
3.
4.
0.17 A
0.50 A
1.5 A
0.75 A
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What is the current through the 4 ohm
resistor?
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3.
4.
25% 25% 25% 25%
1.0 A
0.5 A
1.5 A
2.0 A
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What is the current through the 8 ohm
resistor?
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2.
3.
4.
25% 25% 25% 25%
1.0 A
0.5 A
1.5 A
2.0 A
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Consider the wheatstone bridge circuit. R3 = 4W and
the ratio R2 /R4 = 3 and the galvanometer reads zero
current. If the current in R3 is 0.50 A, what is the current
in R4 ?
25% 25% 25% 25%
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2.
3.
4.
0.17 A
0.50 A
1.5 A
0.75 A
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Consider the wheatstone bridge circuit. R3 = 4W
and the ratio R2 /R4 = 3. The galvanometer
reads zero current. What is R1 ?
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2.
3.
4.
25% 25% 25% 25%
0.75 ohms
1.33 ohms
12 ohms
15 ohms
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24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Consider the wheatstone bridge circuit. R3 = 4W and
the ratio R2 /R4 = 3 and the galvanometer reads zero
current. The potential difference across R4 is 3 V. What
is the potential difference across R2 ?
1.
2.
3.
4.
1V
2V
3V
9V
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
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23
24
25
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30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
If a certain capacitor is charged to 10 V and then, at t =
0, allowed to discharge through a certain resistor. There
will be a certain time before the voltage across the
capacitor reaches 5 V. This time can be decreased for
this circuit by increasing
25% 25% 25% 25%
1.
the size of the
capacitor.
the size of the resistor.
the size of the time
constant.
none of the choices.
2.
3.
4.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1
33
34
2
35
36
3
37
38
394
40
41
42
43
44
45
46
47
48
49
50
Three resistors, each with resistance R1, are in parallel
in a circuit. They are replaced by one equivalent
resistor, R. Comparing this resistor to the first resistor of
the previous circuit,
1.
2.
3.
4.
the current through R equals
the current through R1
the voltage across R equals
the voltage across R1
the power given off by R
equals the power given off
by R1
R is bigger than R1
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
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22
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30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
What is Kirchhoff's 1st equation for this
junction?
1.
2.
3.
4.
I1 = l2 + l3
I2 = I1 + l2
I3 = I1 + l2
I1 + I2 + l3 = 0
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
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32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Three resistors, each with resistance R1 , are in series
in a circuit. They are replaced by one equivalent
resistor, R. Comparing this resistor to the first resistor of
the previous circuit,
1.
the current through R equals
the current through R1
the voltage across R equals
the voltage across R1
the power given off by R
equals the power given off by
R1
2.
3.
4.
25% 25% 25% 25%
R is smaller than R1
1
2
3
4
5
6
7
8
9
10
11
12
13
1 14
15
2 16
17
3 18
19
420
21
22
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25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Which voltage is not caused by a source of
emf?
1.
2.
3.
4.
the voltage across a charged
25% 25% 25% 25%
capacitor
the voltage across two copperiron junctions at different
temperatures
the voltage across the terminals
of a dry cell battery
the voltage from an electric
generator
1
2
3
4
5
6
7
8
9
10
11
12
13
21
22
23
24
25
26
27
28
29
30
31
32
33
41
42
43
44
45
46
47
48
49
50
1
14
15
34
35
2
16
17
36
37
3
18
19
38
39
4
20
40
Which resistor is in series with resistor R?
1.
2.
3.
4.
25% 25% 25% 25%
R1
R2
R3
R4
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Which two resistors are in parallel with each
other?
1.
2.
3.
4.
25% 25% 25% 25%
R and R4
R2 and R3
R2 and R4
R and R1
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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17
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19
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22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A 1000 V battery, a 3000 ohm resistor and a 0.5 microfarad
capacitor are connected in series with a switch. The time constant
for such a circuit, designated by the Greek letter, tau, is defined as
the time that the capacitor takes to charge to 63% of its capacity
after the switch is closed. What is the current in the circuit at a time
interval of tau seconds after the switch has been closed?
25% 25% 25% 25%
1.
2.
3.
4.
0.14 A
0.21 A
0.12 A
0.32 A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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17
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19
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23
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28
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30
31
32
33
34
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36
37
38
39
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41
42
43
44
45
46
47
48
49
50
1
2
3
4
A 1000 V battery, a 3000 ohm resistor and a 0.5 microfarad
capacitor are connected in series with a switch. The
capacitor is initially uncharged. What is the value of the
current the moment after the switch is closed?
25% 25% 25% 25%
1.
2.
3.
4.
0.39 A
0.33 A
0.84 A
2000 A
1
2
3
4
5
6
7
8
9
10
11
12
13
1
14
15
2
16
17
3
18
194
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A 1000 V battery, a 3000 ohm resistor and a 0.5 microfarad
capacitor are connected in series with a switch. The time
constant for such a circuit, designated by the Greek letter,
tau, is defined as the time required to charge the capacitor to
63% of its capacity after the switch is closed. What is the
value of tau for this circuit?
25% 25% 25% 25%
6.0 x 109 s
1.67 x 10-10 s
1.67 x 10-7 s
1.5 x 10-3 s
1.
2.
3.
4.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
21
22
23
24
25
26
27
28
29
30
31
32
331 34
41
42
43
44
45
46
47
48
49
50
15
16
35 2 36
17
18
19
37 3 38
39
20
4
40
Two resistors of values 6 and 12 ohms are connected in
parallel. This combination in turn is hooked in series
with a 3 ohm resistor and a 24 V battery. What is the
current in the 6 ohm resistor?
1.
2.
3.
4.
2.0 A
3.0 A
6.0 A
12.0 A
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Which of the following devices is
designed to measure an approximate
value for the resistance of a conductor?
1. ammeter/voltmeter
combination
2. voltmeter
3. thermocouple
4. ammeter
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Three resistors, with values of 3, 6 and 12 ohms,
respectively, are connected in series. What is the overall
resistance of this combination?
1.
2.
3.
4.
0.58 ohms
1.7 ohms
7.0 ohms
21.0 ohms
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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18
19
20
21
22
23
24
25
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28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Three resistors, with values of 3, 6 and 12 ohms,
respectively, are connected in parallel. What is the
overall resistance of this combination?
1.
2.
3.
4.
0.58 ohms
1.7 ohms
7.0 ohms
21.0 ohms
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Which of the following devices is
designed to measure the resistance of a
conductor more accurately?
1. ammeter/voltmeter
combination
2. voltmeter
3. Wheatstone bridge
4. ammeter
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Two resistors of values 6 and 12 ohms are connected in
parallel. This combination in turn is hooked in series
with a 4 ohm resistor. What is the overall resistance of
this combination?
1.
2.
3.
4.
0.5 ohms
2.0 ohms
8.0 ohms
22.0 ohms
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Two resistors of values 6 and 12 ohms are connected in
parallel. This combination in turn is hooked in series
with a 2 ohm resistor and a 24 V battery. What is the
current in the 2 ohm resistor?
1.
2.
3.
4.
2.0 A
4.0 A
6.0 A
12.0 A
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Three resistors with values R1 , R2 and R3 , respectively,
are connected in parallel. Which of the following
expresses the total resistance, R t , of the three
resistors when connected in parallel?
1.
2.
3.
4.
Rt = R1 + R 2 + R 3
25% 25% 25% 25%
Rt = (1/R1 + 1/R2 + 1/R3)
Rt = R1 = R2 = R3
Rt = (1/R1 + 1/R2 +1/R3 )-1
1
2
3
4
5
6
7
8
9
10
11
12
1
13
14
2
15
16
3
17
18
194
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Three resistors with values of R1 , R2 and R3 ,
respectively, are connected in series. Which of the
following expresses the total resistance, R t , of the
three resistors?
1.
2.
3.
4.
R t = R1 + R 2 + R 3
Rt = (1/R1 + 1/R2 + 1/R3)
Rt = R1 = R2 = R3
Rt = (1/R1 + 1/R2 +1/R3 )-1
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Three resistors connected in parallel have the individual
voltages labeled V1 , V2 and V3 , respectively. Which of
the following expresses the total voltage across the
three resistors when connected in this manner?
1.
2.
3.
4.
Vt = V1 + V2 + V 3
Vt = (1/V1 + 1/V2 + 1/V3)
Vt = V 1 = V 2 = V 3
Vt = (1/V1 + 1/V2 +1/V3 )-1
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Three resistors connected in series have individual
voltages labeled V1 , V2 and V3 , respectively. Which of
the following expresses the value of the total voltage
taken over the three resistors together?
1.
2.
3.
4.
Vt = V1 + V2 + V3
Vt = (1/V1 + 1/V2 + 1/V3)
Vt = V 1 = V 2 = V 3
Vt = (1/V1 + 1/V2 +1/V3 )-
25% 25% 25% 25%
1
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Three resistors connected in series each carry currents
labeled I1 , I2 and I3 . Which of the following expresses
the value of the total current It in the system made up
of the three resistors in series?
1.
2.
3.
4.
lt = l1 + l2 + l3
lt = (1/l1 + 1/l2 + 1/l3)
lt = l1 = l2 = l3
lt = (1/l1 + 1/l2 +1/3 )-1
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Three resistors connected in parallel each carry
currents labeled I1 , I2 and I3 . Which of the following
expresses the value of the total current It in the
combined system?
1.
2.
3.
4.
lt = l1 + l2 + l3
lt = (1/l1 + 1/l2 + 1/l3)
lt = l1 = l2 = l3
lt = (1/l1 + 1/l2 +1/3 )-1
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A circuit contains 3 V battery, a 2 ohm resistor, a 0.3
microfarad capacitor, an ammeter, and a switch all in
series. What will be the current reading 10 min after the
switch is closed?
1.
2.
3.
4.
zero
0.75 A
1.5 A
107 A
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
A circuit contains a 3 V battery, a 2 ohm resistor, a 0.3 microfarad
capacitor, an ammeter, and a switch in series. The sum of all the
potential differences taken for all the components going around the
loop is which of the following?
1.
2.
3.
4.
zero
3.0 V
-3.0 V
6.0 V
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
The basic function of an electromotive
force in a circuit is to do which of the
following?
1.
2.
3.
4.
convert electrical energy
into some other form
convert some other form
of energy into electrical
Both of the choices are
valid
None of the choices are
valid
25% 25% 25% 25%
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50