Calculations on Ohm's Law, Electrical Power, and Electrical Energy

Calculate the current flowing through a resistor with a resistance of 10 ohms and a voltage of 20 volts using Ohm's Law.

• 2 amps

• 15 amps

• 5 amps

• 25 amps

Determine the power consumed by a device with a current of 2 amps and a voltage of 12 volts.

• 30 watts

• 10 watts

• 24 watts

• 15 watts

Find the energy consumed by a light bulb that operates at 60 watts for 5 hours.

• 200 watt-hours

• 360 watt-hours

• 250 watt-hours

• 300 watt-hours

If a circuit has a resistance of 15 ohms and a current of 3 amps, calculate the voltage across the circuit.

• 30 volts

• 45 volts

• 12 volts

• 20 volts

A device with a power rating of 100 watts is connected to a voltage source of 120 volts. Find the current flowing through the device.

• 0.8333 amps

• 1.25 amps

• 2.0 amps

• 0.5 amps

Calculate the resistance of a toaster that draws a current of 5 amps from a 120-volt source.

• 10 ohms

• 5 ohms

• 24 ohms

• 120 ohms

Determine the power dissipated by a resistor with a resistance of 25 ohms and a current of 4 amps.

• 625 watts

• 100 watts

• 400 watts

• 50 watts

Find the energy consumed by a refrigerator that operates at 250 watts for 24 hours.

• 6000 watt-hours

• 2400 watt-hours

• 5000 watt-hours

• 300 watt-hours

Tags

NGSS.HS-PS3-1

If a circuit has a voltage of 50 volts and a resistance of 5 ohms, calculate the current flowing through the circuit.

• 10 amps

• 20 amps

• 5 amps

• 15 amps

A light bulb draws a current of 0.5 amps from a 110-volt source. Calculate the power consumed by the light bulb.

• 110 watts

• 0.05 watts

• 5.5 watts

• 55 watts