Electrical Principles D2L Assignment

Question 1

What causes electrons to flow through a conductor in a circuit?

Answer 1

An imbalance of charges

Question 2

True or False;
Protons have a negative charge and electrons have a positive charge while neutrons have no charge.

Answer 2

False

Question 3

If a coil is used to make an electromagnet, what can be done to increase the strength of the magnetic field?

Answer 3

Put a material with high permeability in the centre

Permeability; degree of magnetization a material obtains in response to an applied magnetic field.

high permeability; Iron alloy
Low; copper, teflon

Question 4

Examples of materials that are considered magnetic;

Answer 4

Iron, nickel, cobalt

Question 5

True or False;
The polarity of the magnetic field around a current carrying conductor is determined by the direction of current flow.

Answer 5

True

Question 6

What is another term for voltage?

Answer 6

Electromotive Force
E = Voltage

Question 7

Aluminium and Copper are conductors or insulators?

Answer 7

Conductors

Question 8

Glass and Ceramic are conductors or insulators?

Answer 8

Insulators

Question 9

What material property does the gate in a transistor have?
Semiconductor? Conductor? Insulator?

Answer 9

Semi-conductor

Question 10

Which type of current flow is where current flows in one direction and has only one polarity?

Answer 10

Direct Current - DC

Question 11

True or False;

Current in a conductor is greatest when the conductor is travelling parallel to the magnetic lines of flux

Answer 11

False;
Chart on page 15 in module explaining

Question 12

Which of the following is used in industrial electrical service?

Answer 12

3 phase AC
page 17

Question 13

If an electrical multi-meter is connected in parallel to a live circuit, what unit of measurement is it ready to measure?

Answer 13

Volts

Question 14

What aspect(Current, Resistance or Voltage) of electricity determines the power of an electric motor?

Answer 14

Current

Amps; rate of flow of electrons(current flow) in a electrical circuit.

I = Induced Current = Amps

Question 15

True or False;
The watt is defined as one ampere per second flowing under one unit of potential difference.

Answer 15

True

Question 16

What measurement distinguishes work from power?

Answer 16

Time

Question 17

True or False;
Two tandem loads in a circuit is an example of a series circuit

Answer 17

True

Question 18

Pick the conditions that would have a lower resistance;

Aluminum instead of copper conductor

A shorter conductor

A larger diameter conductor

A longer conductor

Answer 18

A larger diameter conductor

and

A shorter conductor

Question 19

What type of electrical device causes inductance in a circuit?

Answer 19

A coiled conductor

Question 20

What electrical device is used to store electrical energy in an electrostatic field?

Answer 20

Capacitor

Question 21

If a current of 0.032 amps is measured, how would it be expressed as a whole number?

Answer 21

32 milliamps

.032x1000 = 32