Resistance - OCR Gateway test questions - OCR Gateway

1

What is the unit of resistance?

2

What happens to the resistance of a piece of resistance wire as it gets hotter?

3

What is the total resistance of two 8 Ω resistors connected in series?

4

What does the current–voltage graph for a linear circuit component show?

5

Which statement about thermistors is correct?

6

What current flows in a 100 Ω resistor with a potential difference of 5 V across it?

7

A 3 kW heater is switched on for 3 hours. How much energy is transferred in this time?

8

How much energy is transferred by a 250 W television set in 4 minutes?

9

How much power is transmitted by a current of 2.0 A flowing at a potential difference of 5.0 V?

10

How much power is transmitted by a current of 2.0 A flowing through a 6.0 Ω resistor?