Practical Electricity
Authored by D Fajar
Physics, Science
9th Grade
Used 22+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What will happen when a 240 V, 2 kW electric heater is connected to a mains supply using a plug fitted with a 4 A fuse ?
the fuse in the plug melt
the heater works normally
the heater runs at half power
the heater burns out
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A portable tape-recorder is rated at 12 W, 2 A. How many 1.5 V batteries are needed in the tape-recorder ?
2
4
6
8
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
An electric heater takes a current of 4 A from a 250 V supply when operating normally. How long would it take the heater to convert 400 000 J of electrical energy?
400 s
1 000 s
1 600 s
100 000 s
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Electric energy produced by light a bulb with resistance of 6 ohm when it is passed by electric current for 60 second is 1440 J, the electric current flowing through the light bulb is ….
4 A
3 A
2 A
1 A
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Given an AC of 750 watt, iron of 350 watt, a lamp of 60 watt, an electric stove of 500 watt. If the use is equal to 3 hours with voltage of 220 volt, the equipment using the most energy is ….
AC
Lamps
Iron
Electric stove
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A circuit breaker in a house is set on a voltage of 220 V and flowing current is 2 A. The power of circuit breaker is ….
220 W
330 W
440 W
550 W
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
An electric stove has power of 550 W at a voltage of 110 V, then the fuse chosen is ....
15 A
13 A
10 A
5 A
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