Resistance

Question 1

Arterial with many free electrons will pass current freely is called a…?

Answer 1

Conductor

Question 2

Give 4 examples of a conductor.

Answer 2

Copper
Gold
Silver
Aluminium

Question 3

A material with few free electrons will only pass current with difficulty is called a…?

Answer 3

Insulator

Question 4

Give 4 examples of a insulator.

Answer 4

Plastic
Wood
Paper
Rubber

Question 5

List 4 different factors which affect the resistance of a conductor.

Answer 5

Type of material
Length of conductor
Thickness of material
Temperature

Question 6

State Ohm’s law in full (6 ‘bullet pointed’ marks).

Answer 6

That a Current Flowing through a conductor is Directly Proportional to the applied Voltage across it providing the Temperature Remains Constant and is Inversely Proportional to the Resistance

Question 7

What is the unit of resistance?

Answer 7

Ohms

Question 8

State the formula for calculating total resistance in a series circuit.

Answer 8

Rt=R1+R2+R3

Question 9

State the formula for calculating resistance in a parallel circuit.

Answer 9

1/Rt=1/R1+1/R2+1/R3

Question 10

After working out the total resistance (Rt) in a parallel circuit, what is a good check that your answer is correct?

Answer 10

Use the equation