IPC - CY2 Electricity and Circuits Review

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It can be turned on and off and its strength can be controlled.

Front

What is the function of an electromagnet in a motor?

Back

The electromagnet converts electrical energy to motion.

Front

What is a circuit?

Back

A circuit is a closed path through which an electric current flows.

Front

What is the difference between a series circuit and a parallel circuit?

Back

In a series circuit, all components are connected end-to-end, so there is only one path for current to flow. In a parallel circuit, components are connected across common points, providing multiple paths for current.

Front

What is a voltmeter?

Back

A voltmeter is an instrument used to measure the voltage (electric potential difference) between two points in an electric circuit.

Front

Why does a voltmeter have high resistance?

Back

A voltmeter has high resistance to ensure that it does not draw significant current from the circuit, allowing for accurate voltage measurements.

Front

How should a voltmeter be connected to measure voltage across a resistor?

Back

A voltmeter must be wired in parallel with the resistor it's measuring.

Front

What is the role of a resistor in a circuit?

Back

A resistor limits the flow of electric current in a circuit, providing control over the current and voltage.

Front

What is the definition of electric current?

Back

Electric current is the flow of electric charge, typically measured in amperes (A).

Front

What is the function of a switch in a circuit?

Back

A switch is a device that can open or close a circuit, controlling the flow of electricity.