Understanding Ohm's Law and Power

A circuit consists of a 12 V battery and a resistor of 4 Ω. What is the current flowing through the circuit according to Ohm's Law?

• 2 A

• 3 A

• 4 A

• 6 A

If a 60 W light bulb operates on a 120 V supply, what is the resistance of the bulb?

• 120 Ω

• 240 Ω

• 60 Ω

• 30 Ω

In a series circuit, if the total resistance is 10 Ω and the current is 2 A, what is the total voltage across the circuit?

• 5 V

• 10 V

• 20 V

• 40 V

What is the power consumed by a device that draws 5 A of current from a 120 V source?

• 500 W

• 600 W

• 720 W

• 240 W

If a resistor in a circuit has a resistance of 8 Ω and the voltage across it is 16 V, what is the power dissipated by the resistor?

• 16 W

• 32 W

• 64 W

• 128 W

A circuit has a total power of 100 W and operates at a voltage of 50 V. What is the total current flowing through the circuit?

• 1 A

• 2 A

• 3 A

• 4 A

In a series circuit with a total voltage of 24 V and a total resistance of 12 Ω, what is the current flowing through the circuit?

• 1 A

• 2 A

• 3 A

• 4 A

A 100 W device is connected to a 200 V power supply. What is the current flowing through the device?

• 0.5 A

• 1 A

• 1.5 A

• 2 A

If a circuit has a current of 3 A and a resistance of 5 Ω, what is the voltage across the circuit?

• 8 V

• 10 V

• 15 V

• 20 V

What is the power consumed by a resistor with a resistance of 10 Ω and a current of 2 A flowing through it?

• 20 W

• 40 W

• 60 W

• 80 W