A - Electrical Theory

Question 1

An element consists of:

Answer 1

One kind of atom.

Question 2

Electrons have a:

Answer 2

Negative charge.

Question 3

The nuclear of an atom has:

Answer 3

Protons and neutrons.

Question 4

A conductor of electricity is a material that:

Answer 4

Allows the electrons to move through it.

Question 5

Atoms consist of three still smaller particles called:

Answer 5

Electron. Proton. Neutron.

Question 6

Of these particles, the positively charged particle is the (?) and the negatively charged particle is the (?). The particles found in the nucleus of the atom are the (?) and the (?).

Answer 6

Of these particles, the positively charged particle is the proton and the negatively charged particle is the electron. The particles found in the nucleus of the atom are the neutron and the proton.

Question 7

An atom that has gained a surplus of electrons is said to be a (?) ion and if the atom has lost a number of electrons, it is called a (?) ion.

Answer 7

An atom that has gained a surplus of electrons is said to be a negatively charged ion and if the atom has lost a number of electrons, it is called a positively charged ion.

Question 8

The electrons found in the outermost orbit of the atom are known as:

Answer 8

Valance electrons.

Question 9

Most insulators are:

Answer 9

Compounds of two or more elements.

Question 10

Voltage is electrical:

Answer 10

Force.

Question 11

The opposition to electron flow is:

Answer 11

Resistance.

Question 12

Resistance of a conductor is determined by:

Answer 12

Length, cross-sectional area, temperature and type of material.

Question 13

Current is electrical:

Answer 13

Flow.

Question 14

Which of the following forms of voltage sources require polarity markings?

Answer 14

Direct voltage.

Question 15

Technicians should wear static straps when working on any electronic components to prevent discharges of damaging voltages that are produced by:

Answer 15

Friction.