Lesson Worksheet: Calculating the Electric Current in a Wire Science

In this worksheet, we will practice calculating the electric current in a simple circuit.

Q1:

Which of the following is a measurement of electric charge?

  • A20 watts
  • B3 joules
  • C30 newtons
  • D2 amperes
  • E5 coulombs

Q2:

Which of the following is the unit of electric current?

  • AThe meter
  • BThe watt
  • CThe second
  • DThe coulomb
  • EThe ampere

Q3:

The diagram shows an electric circuit containing a cell and a bulb. The current in the circuit is 1 ampere. How much charge flows past point P in the circuit in one second?

Q4:

The diagram shows an electric circuit containing a cell and a bulb. The amount of charge flowing past point P in one second is 12 coulombs. If the amount of charge flowing past point P in one second were to double, by what factor would the current in the circuit change?

Q5:

The diagram shows two circuits, circuit 1 and circuit 2. In circuit 1, 28 coulombs of charge flows through the bulb in 14 seconds. In circuit 2, 9 coulombs of charge flows through the buzzer in 3 seconds. In which circuit is the current greater?

  • ACircuit 1
  • BCircuit 2

Q6:

The diagram shows an electric circuit containing a cell and a bulb. The current in the circuit is 2 amperes. How much charge flows past point P in the circuit in 1 second?

Q7:

Which of the following is the unit of electric charge?

  • AThe joule
  • BThe ampere
  • CThe newton
  • DThe watt
  • EThe coulomb

Q8:

Which of the following is a measurement of electric current?

  • A6.0 coulombs
  • B80.0 watts
  • C12.4 seconds
  • D1.5 amperes
  • E2.8 meters

Q9:

The mathematical expression currenttime= is an equation with three quantities in it. Two of the quantities have been filled in, current and time. What quantity goes in the numerator of the fraction?

  • ASpeed
  • BDistance
  • CCharge
  • DPotential difference

Q10:

A charge of 10 coulombs flows through a circuit in a time of 5 seconds. What is the current in the circuit?

This lesson includes 16 additional questions and 8 additional question variations for subscribers.

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