year 9 mains electricity & forces revision
Authored by Ann-Marie Cunniffe
Physics, Science
9th Grade
Used 6+ times
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27 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
State which wire in a plug should be in series with the fuse.
earth
live
neutral
cable
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
The fuse is an electrical safety feature used in mains-operated domestic appliances.
what other electrical safety features can be used in mains-operated domestic appliances.
earth wire
circuit breaker
double insulation
metal casing
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain how a fuse protects a domestic appliance
When too much current flows it will melt the fuse breaking the circuit
When current is too low the fuse increases the current
The fuse sticks the wires to the pins
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a plug what colour is the earth wire
blue
brown
yellow and green
green
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
State the formula linking power, current and voltage.
P=IV
P=I/V
P=CV
I=PV
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A hair dryer has a current of 9.6 A.
The mains supply voltage is 230 V. Calculate the power of the hair dryer
24P
2208W
2208P
0.04W
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct unit for power
watts
amps
volts
ohms
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