µ GCSE | Charge

10 quick questions - for GCSE or iGCSE

 

10 minutes maximum! (can you do it in 5?)

1. Electrical charge is measured in

  • A. amps
  • B. volts
  • C. ohms
  • D. coulombs

 

2. The formula to calculate charge is

  • A. charge = current x time ( Q = I.t )

  • B. charge = current ÷ time    (Q = I/t )

  • C. charge = current ÷ voltage    (Q = I/V )

  • D. charge = voltage x current     ( Q = V.I )

3. When a charge flows along a wire in a circuit, the particles moving round are

  • A. electrons
  • B. protons
  • C. neutrons
  • D. atoms

 

What are the missing values in this table showing the charge flowing in a circuit?

 

 
Charge
Current
Time
4.
20 A
5 s
5.
5 C
10 A
6.
400 C
4000 s
7.
200 mA
60 s

 

 

8. What charge flows through a power cable if 30 amps flows through it in 10 seconds?

  • A. 3000 C
  • B. 300 C
  • C. 3 C
  • D. 0.33 C

 

 

 

9. A kettle needs a total charge of 1200 C to boil, in a time of 2 minutes. The current flowing in this time was

  • A. 1 A
  • B. 10 A
  • C. 600 A
  • D. 144 kA

 

10. This circuit was switched on for a short time and 0.4 C of charge flowed. How long was it on for?

  • A. 200 seconds
  • B. 0.2 seconds
  • C. 0.8 seconds
  • D. 0.004 seconds