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WorksheetsIGCSE Review - Electricity
Total questions: 24
Worksheet time: 24mins
Which component matches this symbol?
LDR
Fuse
Cell
Variable resistor
Which component matches this symbol?
LDR
LED
Diode
Bulb
Which component matches this symbol?
fuse
LDR
thermistor
LED
Which of these 4 circuits can be used to measure how the current varies with a change in voltage across a bulb?
Which component has the following characteristic graph - showing how the current varies as the voltage is changed?
bulb
fuse
resistor
diode
Which component has the following characteristic graph - showing how the current varies as the voltage is changed?
bulb
resistor
diode
LDR
Which component has the following characteristic graph - showing how the current varies as the voltage is changed?
bulb
resistor
diode
cell
Which of these answers gives the correct way of connecting each meter?
A
B
C
D
What is the correct name for the unit for measuring resistance?
amp
volt
coulomb
ohm
A computer circuit board contains a 4 kΩ resistor and has a p.d. of 8 V across it.
What does p.d. stand for?
potential difference
potential divider
power difference
power divider
A computer circuit board contains a 4 kΩ resistor and has a p.d. of 8 V across it.
What is the current through the resistor?
2 mA
2 A
16 mA
16 A
Which type of circuit is more suitable for the following 2 applications:
A
B
C
D
To get a large current to flow in a wire, you can either
increase the wire resistance or increase the supply voltage
increase the wire resistance or decrease the supply voltage
decrease the wire resistance or increase the supply voltage
decrease the wire resistance or decrease the supply voltage
Which of these answers gives the correct change in resistance for each component?
A
B
C
D
The safety device that limits the current flow in a plug is the
fuse
cable grip
earth wire
insulation
Where should the earth wire be connected inside a metal toaster?
power supply
heating element
metal casing
Earth wire not needed in a metal appliance
This table describes electrical properties of parts of a mains plug. Which answer is correct?
A
B
C
D
This hair dryer has a case made of plastic. It only needs 2 wires for safe use, and does not need an earth wire. Devices like this are called
neutral devices
safety checked
current controlled
double insulated
When a current passes through a resistance wire it gets hot. Which of these appliances does NOT use this effect?
Toaster
Microwave
Hairdryer
Kettle
Which of these is the correct formula for electrical power?
P = IV
V = IR
V = PI
P = V/I
A 240 volt, 3 amp heater is left running for 5 minutes.
Which of these gives the total energy output?
3.6 kJ
216 kJ
72 kJ
0.9 kJ
Which of the following is the correct unit for charge?
coulomb
capacitance
current
charge
A 6 V light bulb is switched on for a short time. A 6 V battery transfers 2 C of charge to the bulb in this time. What energy has been transferred?
0.33 J
3 J
6 J
12 J
Which of the following is the definition of a 'volt'?
a joule per coulomb
a watt per coulomb
a joule per amp
a watt per ohm
