Electric Current Quiz

What is the formula for calculating voltage in a circuit?

• V = IR

• P = IV

• R = V/I

• I = P/V

What is the formula for calculating power in a circuit?

• P = IV

• V = IR

• R = V/I

• I = P/V

If a resistor of 6 Ω is connected to a 12 V battery, what is the current flowing through the resistor?

• 2 A

• 0.5 A

• 6 A

• 12 A

A current of 12 A flows through a resistor of 7 Ω. What is the voltage across the resistor?

• 84 V

• 7 V

• 12 V

• 96 V

A current of 12 A flows through a resistor of 7 Ω. What is the power dissipated in the resistor?

• 1008 W

• 84 W

• 144 W

• 588 W

A resistor has a resistance of 8 Ω and a current of 5 A flowing through it. What is the voltage across the resistor?

• 40 V

• 8 V

• 5 V

• 32 V

What is the unit of resistance in an electrical circuit?

• Ohm (Ω)

• Volt (V)

• Ampere (A)

• Watt (W)

If the voltage in a circuit increases, what happens to the power (assuming the current remains constant)?

• Power increases

• Power decreases

• Power remains the same

• Power becomes zero

What is the voltage across a resistor of 5 Ω when a current of 4 A flows through it?

• 20 V

• 10 V

• 5 V

• 25 V

What is the voltage across a resistor of 12 Ω when a current of 2 A flows through it?

• 24 V

• 12 V

• 6 V

• 48 V