Electricity Pre-test

Which of the following is a conductor?

• 1. Glass

• 1. Pure water

• 1. Plastic

• 1. Copper

Which of the following is an insulator?

• 1. Aluminium

• 1. Copper

• 1. Oil

• 1. Brass

The two poles of a magnet are:

• 1. Positive and negative

• 1. Up and down

• 1. Left and Right

• 1. North and South

The area where the magnetic force acts is called the:

• 1. Magnetic field

• 1. Magnetic area

• 1. Magnetic perimeter

• 1. Magnitude

Which of the following statements about electrostatic charge is NOT correct?

• 1. Two objects with like charges repel

• 1. Two objects with opposite charges attract

• 1. Charged objects attract neutral objects

• 1. Protons move from one object to another when rubbed together

An electric circuit is:

• 1. A closed pathway made from conducting material.

• 1. A measure of how difficult it is for charges to move

• 1. The movement of electrons around a circuit

• 1. Carried by protons and electrons and is either positive or negative

An electric current results from the movement of:

• 1. positively charged protons around a circuit

• 1. neutrons around a circuit

• 1. None of the above

• 1. negatively charged electrons around a circuit

Electric currents are measured by:

• 1. An ammeter

• 1. A voltmeter

• 1. A motor

• 1. A thermometer

A sudden increase in current will cause a _____________ to break the circuit.

• 1. Switch

• 1. Bulb

• 1. Diode

• 1. Fuse

When a small compass is placed in a magnetic field, its needle shows:

• 1. The magnetic field lines surrounding the magnet

• 1. The direction of the magnetic field

• 1. The strength of the magnetic field

• 1. The conventional current flow within a magnet