Electricity

Question 1

Amps =

Answer 1

Current

Question 2

Coulomb =

Answer 2

Charge

Question 3

Seconds =

Answer 3

Time

Question 4

Volts =

Answer 4

Potential Difference

Question 5

Ohms =

Answer 5

Resistance

Question 6

Joule =

Answer 6

Energy

Question 7

Watt is used in…

Answer 7

Power

Question 8

Function of the fuse =

Answer 8

Stops the current from flowing by melting when it’s too high

Question 9

Circuit breakers function =

Answer 9

Breaks the circuit when the current is too high

Question 10

Function of insulation and double insulation =

Answer 10

To prevent people from getting a electrical shock

Question 11

Eearth wire =

Answer 11

Provides a short pathway for electricty to get earthed when it gets into contact with a human

Question 12

What does resistance cause:

Answer 12

Resistance causes transfer of electrical energy to heat energy

Question 13

Power(W) equation =

Answer 13

Voltage(V) x Current (A)

Question 14

Energy(J) equation =

Answer 14

Potential Difference (V) x Current (A) x Time (s)

Question 15

What is A.C

Answer 15

Alternating Current: Current constantly changles direction. The usual main suply is of 230V (in the UK)

Question 16

What id D.C

Answer 16

Direct Current: Current only flows in one direction, it is displayed as a single straight line. The usual main suply is 1.5V

Question 17

Advantages of a parallel and series circuit

Answer 17

Parallel:
- Components (e.g. bulbs) may be switched on/off independently
- If one component breaks, current can still flow through the other parts
of the circuit
- Bulbs maintain a similar brightness

Series:
- Fewer wires, cheaper and easier to assemble.
- Uses less power

Question 18

What is the relationship between Current and Voltage

Answer 18

As voltage increases, current increases

Question 19

How does the amount of components affect the current

Answer 19

The more amount of components the lower the current