Electricity

Question 1

How do you find potential difference and what are the two power equations

Answer 1

V=IxR

P=VxA
P=I2xR

Question 2

Name all types of resistors

Answer 2

Resistor/Light dependent resistor/Fuse/Thermistor/

Question 3

What does LED stand for

Answer 3

Light emitting diode

Question 4

Which way does current flow

Answer 4

Positive to negative

Question 5

What does current and potential difference do in series and parallel circuits

Answer 5

Current in series circuits is the same. While in parallel it is shared.
Voltage is shared in series and the same in parallel

Question 6

What are the units for W V I R

Answer 6

W=Watts
V=Volts
I=Amps
R=Resistancce

Question 7

What happens if the wire length increases

Answer 7

The resistance increases

Question 8

What is the equation for charge flow and what are the units

Answer 8

Q=Ixt
Coulombs=Ampsxseconds

Question 9

What colours are neutral live and earth wires and their voltage

Answer 9

Neutral Blue 0V
Live Brown 0V
Earth Yellow and Green 230 V

Question 10

Energy equations

Answer 10

E=Pxt
E=QxV

Question 11

Types of transformers

Answer 11

Step up increases voltage and decreases current
Step down decreases voltage and increases current

Question 12

Whne does thermistors resistance change

Answer 12

Temperature increase temperature decrease