P2,1,5 - Resistance Flashcards Preview

SHHS - Science - P2.1 Electricity and Magnetism - Year 8 > P2,1,5 - Resistance > Flashcards

Flashcards in P2,1,5 - Resistance Deck (15)
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1
Q

What is meant by the electrical resistance of a component?

A

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

2
Q

Which units do we measure resistance in?

A

Ohms

3
Q

What is missing from the triangle?

A
4
Q

What is missing from the triangle?

A
5
Q

What is missing from the triangle?

A
6
Q

Why is the current different in each of these circuits?

A

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

7
Q

Resistance (Ohms) = _________ ÷ ___________

A

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

8
Q

Current (A) = ____________ ÷ _____________

A

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

9
Q

Potential Difference (V) = __________ x ___________

A

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

10
Q

Metals are very good _____________

A

conductors.

11
Q

Good conductors have a very ____ resistance.

A

Low

12
Q

What is meant by a component with a low resistance?

A

A high current can flow through it.

13
Q

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

A

Current cannot flow through it very well (insulators)

14
Q

Insulators have a very _____ electrical resistance.

A

High

15
Q

How can the word 'Ohms' be written as a symbol?

A