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

What is meant by the electrical resistance of a component?

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

2

Which units do we measure resistance in?

Ohms

3

What is missing from the triangle?

4

What is missing from the triangle?

5

What is missing from the triangle?

6

Why is the current different in each of these circuits?

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

7

Resistance (Ohms) = _________ ÷ ___________

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

8

Current (A) = ____________ ÷ _____________

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

9

Potential Difference (V) = __________ x ___________

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

10

Metals are very good _____________

conductors.

11

Good conductors have a very ____ resistance.

Low

12

What is meant by a component with a low resistance?

A high current can flow through it.

13

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

Current cannot flow through it very well (insulators)

14

Insulators have a very _____ electrical resistance.

High

15

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