Electrical Power and Current Quiz

Which of the following is the unit of power?

• Joule

• Watt

• Ampere

• Volt

What is the relationship between power (P), voltage (V), and current (I)?

• P=V+I

• P=V×I

• P=V/I

• P=I2×V

If the current in a circuit is 2A and the resistance is 10Ω, what is the voltage across the resistor?

• 5V

• 10V

• 20V

• 40V

The energy consumed by a 100W device in 1 hour is:

• 100 Joules

• 3600 Joules

• 100 kWh

• 360,000 Joules

Which of the following devices converts electrical energy into mechanical energy?

• Battery

• Generator

• Motor

• Transformer

What is the SI unit of electric current?

• Coulomb

• Ampere

• Volt

• Watt

A 60W light bulb is connected to a 120V power supply. What is the current through the bulb?

• 0.5A

• 1A

• 2A

• 0.25A

The potential difference (voltage) across the ends of a conductor is directly proportional to the current through it. This statement is based on:

• Ohm's Law

• Joule's Law

• Faraday's Law

• Kirchhoff's Law

If a charge of 10C passes through a conductor in 5 seconds, the current flowing is:

• 0.5A

• 2A

• 10A

• 50A

What is the power dissipated in a resistor of 5Ω when a current of 3A flows through it?

• 15W

• 45W

• 9W

• 25W