Unit 1 Review: Electricity and Magnetism

Front

What happens when two north poles of a magnet are placed together?

Back

They repel.

Front

Which bulb will light in a circuit?

Back

The bulb that is part of a complete circuit.

Front

What is the unit of measurement for electric current?

Back

Ampere (A).

Front

What is the relationship between voltage, current, and resistance in a circuit?

Back

Ohm's Law: V = I × R.

Front

What happens to the magnetism of a screw when the electric current is lost?

Back

The screw would no longer be magnetic.

Front

What is a compass needle?

Back

A small magnet that aligns itself with the Earth's magnetic field.

Front

What is the effect of placing a south pole of a magnet near a north pole?

Back

They attract each other.

Front

What is the principle behind electromagnetism?

Back

Electric current produces a magnetic field.

Front

What is the function of a circuit breaker?

Back

To protect an electrical circuit from overload or short circuit.

Front

What is the role of a resistor in a circuit?

Back

To limit the flow of electric current.