Transcript Which of the following is the unit of electrical current? 1. Joule

Which of the following is the unit of electrical
current?
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
Joule
Volt
Ampere
Watt
Coulomb
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Which of the following is the symbol for a fuse?
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
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The symbol below is sometimes seen on the
rating plates of appliances.
This tells you that the appliance
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
Operates at 230V
Does not require a live wire
Does not require a earth wire
Does not require a neutral wire
Does not need a fuse
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The insulation on the wires in a mains flex is
colour coded. Which of the following correctly
identifies the colour of the wires?
Live
Neutral
Earth
20% 1.
20% 2.
20% 3.
20% 4.
20% 5.
blue
green/yellow
blue
brown
brown
green/yellow
brown
brown
green/yellow
blue
brown
blue
green/yellow
blue
green/yellow
In the circuit below the resistors P,Q,R and S have the same
resistance. In which resistors is the current the same?
P
Q
R
S
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
Q and S
Q, R and S only
P,Q,R and S
P and S only
Q and R only
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In the circuit below the reading on Ammeter A1 is
5A and on Ammeter A2 is 2 A. the reading on A3 is
A1
A2
A3
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
1.5 Amperes
2 Amperes
3 Amperes
5 Amperes
7 Amperes
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Which of the following correctly lists the
units of power and resistance
Power
Resistance
1. Watt
Ohm
2. Ampere
Ohm
3. Ohm
Ampere
4. Ohm
Watt
5. Ampere
Watt
20%
20%
20%
20%
20%
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The circuit diagram shows
a lamp a motor and a resistor
connected in series to a supply.
The voltage across each
component is shown on the
diagram below. The voltage
of the supply must be :
1.
20% 2.
20% 3.
20% 4.
20% 5.
20%
4v
M
4v
2v
2 volts
4 volts
6volts
10 volts
32 volts
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In the circuit shown, the
current in the 2 Ω resistor
is 1A. What is the current
taken from the battery?
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
2Ω
3Ω
0.4 A
1A
2A
3A
5A
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The kilowatt hour is a unit of
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
Voltage
Current
Power
Energy
Charge
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The frequency and voltage of the mains
electricity that comes into our homes is
Frequency Voltage
(Hz)
(V)
1. 50
120
2. 60
120
3. 50
440
4. 60
230
5. 50
230
20%
20%
20%
20%
20%
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Three identical 6V lamps operating
at normal brightness are connected
to a supply as shown.
What is the supply voltage?
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
0.5v
2.0v
3.0v
6.0v
18.0v
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A disc jockey increases the volume of CD
being played. To do this she is:
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
Increasing the resistance in the circuit
decreasing the resistance in the circuit
decreasing the voltage in the circuit
decreasing the current in the circuit
Increasing the frequency in the circuit
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A lamp of resistance 5 Ω is connected to a 10v
supply. What would be the current in the lamp?
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
0.5A
2.0A
10.0A
15.0A
50.0A
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In this circuit the resistance of
the variable resistor is increased.
Which row correctly describes A
what happens?
Ammeter Reading
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
Increases
Decreases
Increases
Decreases
Decreases
Lamp Brightness
brighter
brighter
dimmer
dimmer
same
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Which of the following shows the correct
energy change for the electrical device?
20%20%
20%20%
1.
2.
3.
4.
5.
Cooker:
Kettle:
Hairdryer:
Lightbulb:
Television:
heat
heat
electrical
heat
light
electrical
kinetic
kinetic
light and sound
sound
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An electric cooker uses lots of electrical energy.
The power rating of a cooker is approximately
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
3000w
3000kw
12kw
2kw
12mw
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Andrew purchases a lamp for his father’s car.
The lamp has 6w 12v marked on it. What is
the current when it is operating normally?
20%
1. 0.5A
20%
2. 2.0A
20%
3. 6.0A
4. 12.0A
20%
5. 72.0A
20%
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In a filament lamp and fluorescent tube ,
electrical energy is converted into light. Where in
each lamp does this happen?
Filament lamp
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
in the resistance wire
in the gas
in the glass
in the glass
in the resistance wire
Fluorescent tube
in the gas
in the gas
in the gas
in the resistance wire
in the glass
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In the circuit , the lamps
are identical the reading
on the Ammeter A1 is 4A.
What is the reading on the
other three meters?
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
A2
A3
A4
4A
2A
4A
2A
2A
4A
2A
4A
2A
2A
4A
2A
2A
4A
1A
A2
A4
A1
A3
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