Electricity

Question 1

Energy

Answer 1

Makes things happen when its transferred in a circuit

Question 2

Charge

Answer 2

A property of some particles that stores energy in an electrostatic store which can then be transferred

Question 3

Current

Answer 3

The flow/ movement of charge

Question 4

PD ( voltage )

Answer 4

How much energy each unit of charge transfers

Question 5

Voltmeter

Answer 5

Measures PD

Question 6

Variable resistor

Answer 6

Adjusts current

Question 7

Resistance

Answer 7

How difficult it is to generate a current

Question 8

Factors that affect resistance

Answer 8

Material- different materials have different structures - different resistances
Length of wire - longer the wire, more collisions between electrons & ions ; it has higher resistance
Thickness of wire - a thicker wire has less collisions between electrons & ions ; it has lower resistance
Temperature - a hotter wire means that ions have more energy, vibrate faster with greater amplitude. More collisions between ions & electrons , higher resistance

Question 9

How would you describe a graph that has a straight line through the origin?

Answer 9

Directly proportional

Question 10

Why do metals conduct electricity so well?

Answer 10

Because the delocalised electrons carry charge

Question 11

What happens when delocalised electrons collide with ions?

Answer 11

They lose resistance