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What do you mean by the short-circuiting of a circuit?             

Important Questions on Electricity

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8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 8 - Electricity>TEST YOURSELF>Q B
Figure shows two ways of connecting the three bulbs A, B and C to a battery. Name the two arrangements. Which of them do you prefer to use in a household circuit? Give a reason to support your answer.
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8th ICSE
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Concise Physics Middle School for Class 8>Chapter 8 - Electricity>TEST YOURSELF>Q B
How are the electrical appliances connected in a household circuit: in series or in parallel? Give reason.
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8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 8 - Electricity>TEST YOURSELF>Q B
In the household electric circuit, if one bulb is fused in a room, the other bulbs keep glowing. Explain the reason.
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8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 8 - Electricity>TEST YOURSELF>Q B
State the voltage at which electricity is supplied to our houses.
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8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 8 - Electricity>TEST YOURSELF>Q B
Draw a labelled diagram with the necessary switches to connect a bulb, a fan and a plug socket in a room with the mains. In what arrangement will you connect them to the mains?
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8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 8 - Electricity>TEST YOURSELF>Q B
State the colour coding of the three wires in a cable used for wiring in a household electrical circuit.
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8th ICSE
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Concise Physics Middle School for Class 8>Chapter 8 - Electricity>TEST YOURSELF>Q B
Why is the metal covering of an electrical appliance earthed?
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8th ICSE
IMPORTANT
Concise Physics Middle School for Class 8>Chapter 8 - Electricity>TEST YOURSELF>Q C
An electrical appliance is rated as 60 W–150 V. What do you understand by this statement?