Electricity

Question 1

Static Electricity

Answer 1

Is a build up of electric charge that can occur on good insulators
E.g polythene and Perspex rods

Question 2

Polythene Rod

Answer 2

Gains electrons if a woollen cloth is rubbed on it (becamos negatively charged)

Question 3

Perspex Rod

Answer 3

Loses electrons if it is rubbed by a woollen cloth (becomes positively charged)

Question 4

Gold Leaf Electroscope

Answer 4

Detect Charge
Show size of charge
Test nature of charge
Test for insulator or conducted
Show size of perennial differnece

Question 5

Electric Current

Answer 5

Is caused by the flow of electrons through a good conductor such as a metal.
A good insulator does not allow electric current to flow.

Question 6

Electric Cureent

Answer 6

Is a flow of Electric charge

Question 7

Electric Current

Answer 7

Conductors are substances which allow electric

Question 8

Batteries

Answer 8

Energy provided by a battery or power pack is needed to move the current around the circuit.

Question 9

Potential Difference

Answer 9

The difference in electrical pressure between positive and negative ends

Question 10

Resistance

Answer 10

Resistance is the opposition to the flow of electrons. The unit is the Ohm, and it is measured using an Ohmmeter.

Question 11

Ohms Law

Answer 11

Ohms Law states that voltage is directly proportional to current

Question 12

Ohms Law

Answer 12

V - I
V - R
I x R

Question 13

Effects of Electricity

Answer 13

Heating
Chemical
Magnetic

Question 14

Direct Current

Answer 14

Direct Current goes in one direction only

Question 15

Alternating Current

Answer 15

Alternating Current changes very quickly, many times a second