Topic P2- Electricity

Question 1

What is the potential difference (or voltage)?

Answer 1

The driving force that pushes the charge round. It’s unit is the volt

Question 2

What does a fuse symbol look like?

Answer 2

A rectangle with a horizontal line going through it

Question 3

What does a resistor symbol look like?

Answer 3

A rectangle

Question 4

What does a variable resistor symbol look like?

Answer 4

A rectangle with a arrow going through it at an angle

Question 5

What does voltmeter measure?

Answer 5

Potential difference in volts
Placed in parallel

Question 6

What does a LDR symbol look like?

Answer 6

A rectangle with a circle round it and two arrows going towards it

Question 7

What does an ammeter measure?

Answer 7

Current in amps
Placed in series

Question 8

What are the 4 steps to investigate the factors affecting resistance?

Answer 8

1) Attach a crocodile clip yo the wire level with 0cm on the ruler. Attach the second one 10cm away.
2) Close the switch, then record the current and pd. Open the switch then move the second clip.
3) Repeat 1-2 with different lengths and then calculate resistance.
4) plot a graph, which should be a straight line