Which of the following is the unit of electrical current?

1
Which of the following is the unit of electrical
current?

1. Joule
2. Volt
3. Ampere
4. Watt
5. Coulomb

2
Which of the following is the symbol for a fuse?

3
The symbol below is sometimes seen on the rating
plates of appliances.This tells you that the
appliance

1. Operates at 230V
2. Does not require a live wire
3. Does not require a earth wire
4. Does not require a neutral wire
5. Does not need a fuse

4
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

1. blue green/yellow brown
2. green/yellow brown blue
3. blue brown
   green/yellow
4. brown green/yellow blue
5. brown blue
   green/yellow

5
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

1. Q and S
2. Q, R and S only
3. P,Q,R and S
4. P and S only
5. Q and R only

6
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

1. 1.5 Amperes
2. 2 Amperes
3. 3 Amperes
4. 5 Amperes
5. 7 Amperes

7
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

8
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
4 v 4v 2v
M

1. 2 volts
2. 4 volts
3. 6volts
4. 10 volts
5. 32 volts

9
In the circuit shown, the current in the 2 O
resistor is 1A. What is the current taken from
the battery?
2 O
3 O

1. 0.4 A
2. 1A
3. 2A
4. 3A
5. 5A

10
The kilowatt hour is a unit of

1. Voltage
2. Current
3. Power
4. Energy
5. Charge

11
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

12
Three identical 6V lamps operating at normal
brightness are connected to a supply as shown.
What is the supply voltage?

1. 0.5v
2. 2.0v
3. 3.0v
4. 6.0v
5. 18.0v

13
A disc jockey increases the volume of CD being
played. To do this she is

1. Increasing the resistance in the circuit
2. decreasing the resistance in the circuit
3. decreasing the voltage in the circuit
4. decreasing the current in the circuit
5. Increasing the frequency in the circuit

14
A lamp of resistance 5 O is connected to a 10v
supply. What would be the current in the lamp?

1. 0.5A
2. 2.0A
3. 10.0A
4. 15.0A
5. 50.0A

15
In this circuit the resistance of the variable
resistor is increased. Which row correctly
describes what happens? Ammeter Reading
Lamp Brightness

1. Increases brighter
2. Decreases brighter
3. Increases dimmer
4. Decreases dimmer
5. Decreases same

16
Which of the following shows the correct energy
change for the electrical device?

1. Cooker heat electrical
2. Kettle heat kinetic
3. Hairdryer electrical kinetic
4. Lightbulb heat light and sound
5. Television light sound

17
An electric cooker uses lots of electrical
energy. The power rating of a cooker is
approximately

1. 3000w
2. 3000kw
3. 12kw
4. 2kw
5. 12mw

18
Andrew purchases a lamp for his fathers car. The
lamp has 6w 12v marked on it. What is the current
when it is operating normally?

1. 0.5A
2. 2.0A
3. 6.0A
4. 12.0A
5. 72.0A

19
In a filament lamp and fluorescent tube ,
electrical energy is converted into light. Where
in each lamp does this happen? Filament
lamp Fluorescent tube

1. in the resistance wire in the gas
2. in the gas in the gas
3. in the glass in the gas
4. in the glass in the resistance wire
5. in the resistance wire in the glass

20
In the circuit , the lamps are identical the
reading on the Ammeter A1 is 4A. What is the
reading on the other three meters?
A2 A3 A4

1. 4A 4A 4A
2. 2A 2A 2A
3. 4A 4A 2A
4. 2A 2A 4A
5. 2A 2A 1A