Worksheet: Current and Charge

In this worksheet, we will practice defining electrical current and converting between a current in amperes and the number of coulombs of charge delivered.

Q1:

For how long would a current of 0.15 A need to be sustained to deliver a charge of 12 C?

Q2:

After 30 s, the total charge that passes a specific point in a circuit is 12 C. What is the current?

Q3:

What is the equation which expresses the total charge ( 𝑄 ) delivered by a current ( 𝐼 ) in a period of time ( 𝑡 ) ?

  • A 𝑄 = 𝐼 𝑡
  • B 𝑄 = 𝐼 𝑡
  • C 𝑄 = 𝑡 𝐼
  • D 𝑄 = 𝐼 × 𝑡
  • E 𝑄 = 𝐼 × 𝑡 2

Q4:

A current of 0.2 A passes through a wire for a period of 60 s. Calculate the total charge delivered by the wire.

Q5:

Which of the following electrical currents would deliver the greatest charge?

  • A 0.10 A for 35 s
  • B 0.05 A for 60 s
  • C 1.0 A for 1.0 s
  • D 0.25 A for 15 s
  • E 20 A for 0.15 s

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