Physics 8 - Review on Electricity

Which of the following is NOT a basic component of an electric circuit?

• Power source

• Load

• Conducting Path

• Switch

What component is used to open or close an electric circuit?

• Resistor

• Battery

• Switch

• Wire

Which component provides the energy needed to move charges through a circuit?

• Load

• Power Source

• Wire

• Switch

In a simple electric circuit, what is the role of a resistor?

• To increase the current

• To decrease the voltage

• To resist the flow of electric current

• To store electric charge

What does a lamp as a load do in an electric circuit?

• It stores electric energy

• It converts electrical energy into light and heat

• It decreases the resistance

• It increases the current

What is the unit of electric current?

• Volt(V)

• Ampere(A)

• Ohm(Ω)

• Watt(W)

What is the unit of electrical resistance?

• Volt(V)

• Ampere(A)

• Ohm(Ω)

• Watt(W)

What is the unit of voltage?

• Volt(V)

• Ampere(A)

• Ohm(Ω)

• Joule(J)

If a circuit has a current of 2A and a resistance of 5Ω, what is the voltage across the circuit?

• 10V

• 7V

• 5V

• 2V

What happens to the current in a series circuit when more resistors are added?

• The current increases

• The current decreases

• The current remains the same

• The current becomes zero