Unit 8 Electricity CSA Review

What is the current in a circuit powered by a 12-volt battery with a resistance of 4 ohms?

• 3 A

• 4 A

• 6 A

• 12 A

A circuit has a resistance of 8 Ω and a current of 2 A. What is the voltage across the circuit?

• 4 V

• 8 V

• 16 V

• 32 V

As resistance decreases while the voltage remains the same, what happens to the current?

• It increases

• It decreases

• It remains the same

• It fluctuates

A 3 Ω resistor is connected to a 6 V power source. How much current flows through the circuit?

• 0.5 A

• 1.5 A

• 2 A

• 3 A

Which factor does NOT affect the resistance of a wire?

• Length of the wire

• Material of the wire

• Temperature of the wire

• Shape of the wire

A material that allows electrons to flow easily is called a(n):

• Conductor

• Insulator

• Semiconductor

• Resistor

Tags

NGSS.HS-PS2-5

An electric circuit with a 15 V battery and a 0.5 A current has what total resistance?

• 7.5 Ω

• 15 Ω

• 30 Ω

• 45 Ω

Which of the following actions will increase the current in a circuit?

• Increasing resistance

• Decreasing resistance

• Decreasing voltage

• Adding more components in series

A circuit powered by a 10 V battery produces a current of 2.5 A. What is the circuit's resistance?

• 2 Ω

• 4 Ω

• 5 Ω

• 7.5 Ω

What is the voltage of a circuit with a current of 3 A and a resistance of 10 Ω?

• 3 V

• 10 V

• 30 V

• 300 V