KS3 Circuits Quiz (Edexcel)

What is the unit of electric current?

• Volt

• Ohm

• Ampere

• Watt

The voltage of the battery in a parallel circuit with two branches is 9V. What is the voltage of the lamp in branch 1 and the lamp in branch 2?

• 4.5V

• 3V

• 9V

• 6V

Which of the below is an example of a resistor?

• Lamp

• Battery

What happens to the current in a series circuit if you add more resistors?

• It increases

• It stays the same

• It decreases

• It becomes zero

In a parallel circuit, the voltage across each branch is:

• Different

• Zero

• The same

• Half the total

What is the formula for Ohm’s Law?

• V = I × R

• V = R ÷ I

• I = V × R

• R = V + I

If a circuit has a voltage of 12V and a resistance of 4Ω, what is the current?

What is the unit of resistance?

• Amp

• Volt

• Ohm

• Watt

Which component is used to control the current in a circuit?

• Bulb

• Switch

• Resistor

• Battery

In a series circuit, the total resistance is:

• The same as one resistor

• The sum of all resistors

• The average of all resistors

• Always 0