# 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 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?