P2,1,5 - Resistance

Question 1

What is meant by the electrical resistance of a component?

Answer 1

How easy or difficult it is for an electric charge to move through components in a circuit.

Question 2

Which units do we measure resistance in?

Answer 2

Ohms

Question 3

What is missing from the triangle?

Answer 3

Question 4

What is missing from the triangle?

Answer 4

Question 5

What is missing from the triangle?

Answer 5

Question 6

Why is the current different in each of these circuits?

Answer 6

The resistance of the motor must be greater than the resistance of the bulb.

Question 7

Resistance (Ohms) = _________ ÷ ___________

Answer 7

Resistance = Potential Difference (V) ÷ Current (A)

Question 8

Current (A) = ____________ ÷ _____________

Answer 8

Current (A) = Potential difference (V) ÷ Resistance (Ohms)

Question 9

Potential Difference (V) = __________ x ___________

Answer 9

Potential Difference (V) = Current (A) x Resistance (Ohms)

Question 10

Metals are very good _____________

Answer 10

conductors.

Question 11

Good conductors have a very ____ resistance.

Answer 11

Low

Question 12

What is meant by a component with a low resistance?

Answer 12

A high current can flow through it.

Question 13

What is meant by a component with a very high resistance?

Answer 13

Current cannot flow through it very well (insulators)

Question 14

Insulators have a very _____ electrical resistance.

Answer 14

High

Question 15

How can the word ‘Ohms’ be written as a symbol?

Answer 15