Question 1

The better conductor of electricity is:

• copper

• carbon

• silicon

• aluminium

Question 2

Silicon in its pure form is:

• a conductor

• an insulator

• a superconductor

• a semiconductor

Question 3

Three good electrical conductors are:

• copper, gold, mica

• gold, silver, wood

• gold, silver, aluminium

• copper, aluminium, paper

Question 4

These magnetic poles repel:

• unlike

• like

• positive

• negative

Question 5

In a p-type semiconductor, the current carriers are:

• photons

• electrons

• positive ions

• holes

Question 6

The following is a source of electrical energy:

• p-channel FET Transistor

• carbon resistor

• germanium diode

• lead acid battery

Question 7

This material is better for making a permanent magnet:

• steel

• copper

• aluminium

• soft iron

Question 8

An important difference between a common torch battery and a lead acid battery is that only the lead acid battery:

• has two terminals

• contains an electrolyte

• can be re-charged

• can be effectively discharged

Question 9

An atom that loses an electron becomes:

• a positive ion

• an isotope

• a negative ion

• a radioactive atom

Question 10

An electric current passing through a wire will produce around the conductor:

• an electric field

• a magnetic field

• an electrostatic field

• nothing

Question 11

As temperature increases, the resistance of a metallic conductor:

• increases

• decreases

• remains constant

• becomes negative

Question 12

An element which falls somewhere between being an insulator and a conductor is called a:

• P-type conductor

• intrinsic conductor

• semiconductor

• N-type conductor

Question 13

The term describing opposition to electron flow in a metallic circuit is:

• current

• voltage

• resistance

• power

Question 14

Four good electrical insulators are:

• plastic, rubber, wood, carbon

• glass, wood, copper, porcelain

• paper, glass, air, aluminium

• glass, air, plastic, porcelain

Question 15

The plastic coating formed around wire is:

• an insulator

• a conductor

• an inductor

• a magnet

Question 16

In an atom:

• the protons and the neutrons orbit the nucleus in opposite directions

• the protons orbit around the neutrons

• the electrons orbit the nucleus

• the electrons and the neutrons orbit the nucleus

Question 17

The substance which will most readily allow an electric current to flow is:

• an insulator

• a conductor

• a resistor

• a dielectric

Question 18

In an n-type semiconductor, the current carriers are:

• holes

• electrons

• positive ions

• photons

Question 19

An electrical insulator:

• lets electricity flow through it in one direction

• does not let electricity flow through it

• lets electricity flow through it when light shines on it

• lets electricity flow through it

Question 20

The name for the flow of electrons in an electric circuit is:

• voltage

• resistance

• capacitance

• current

ANSWERS!!!

Question 1 The better conductor of electricity is:

Correct Answer: copper

Question 2

Silicon in its pure form is:

Correct Answer: an insulator

Question 3

Three good electrical conductors are:

Correct Answer: gold, silver, aluminium

Question 4

These magnetic poles repel:

Correct Answer: like

Question 5

In a p-type semiconductor, the current carriers are:

Correct Answer: holes

Question 6

The following is a source of electrical energy:

Correct Answer: lead acid battery

Question 7

This material is better for making a permanent magnet:

Correct Answer: steel

Question 8

An important difference between a common torch battery and a lead acid battery is that only the lead acid battery:

Correct Answer: can be re-charged

Question 9

An atom that loses an electron becomes:

Correct Answer: a positive ion

Question 10

An electric current passing through a wire will produce around the conductor:

Correct Answer: a magnetic field

Question 11

As temperature increases, the resistance of a metallic conductor:

Correct Answer: increases

Question 12

An element which falls somewhere between being an insulator and a conductor is called a:

Correct Answer: semiconductor

Question 13

The term describing opposition to electron flow in a metallic circuit is:

Correct Answer: resistance

Question 14

Four good electrical insulators are:

Correct Answer: glass, air, plastic, porcelain

Question 15

The plastic coating formed around wire is:

Correct Answer: an insulator

Question 16

In an atom:

Correct Answer: the electrons orbit the nucleus

Question 17

The substance which will most readily allow an electric current to flow is:

Correct Answer: a conductor

Question 18

In an n-type semiconductor, the current carriers are:

Correct Answer: electrons

Question 19

An electrical insulator:

Correct Answer: does not let electricity flow through it

Question 20

The name for the flow of electrons in an electric circuit is:

Correct Answer: current

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