Units (Magnetism & Electromagnetism)

Which SI unit uses the symbol 'V'? State the physical quantity it measures.

A power supply provides 12 V to a lamp. What is the SI unit of power that the lamp uses?

State the unit used to measure electric current.

What is the symbol for the unit of voltage?

Which of these units is used to measure power?

A student investigates an electromagnet. She measures a current of 2.0 amperes flowing through the coil when a voltage of 12.0 volts is applied.

Name the SI unit for power.

Explain why it is important to use the correct SI unit when measuring electric current, voltage, and power in physics experiments.

A light bulb is connected to a power supply. The supply provides a voltage of 6.0 V, and a current of 0.40 A passes through the bulb. Calculate the power delivered to the bulb. Give your answer to 2 significant figures and include the correct unit.

The table below shows measurements taken from different electrical devices.

For each device, calculate the power consumption. Write your answers with units.