What will be the current drawn by an electric bulb of 40 W when it is connected to a source of 220 V?
[8] Current Electricity
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What do you mean by watt-hour?
[8] Current Electricity
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What do you mean by direct current?
[8] Current Electricity
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What do you mean by A.C.?
[8] Current Electricity
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How does an alternating current differ from the direct current?
[8] Current Electricity
Chapter: [8] Current Electricity
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Which type of current does a generator with commutator produce?
[8] Current Electricity
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What do you mean by short-circuiting?
[8] Current Electricity
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State two important precautions you should observe while using electricity?
[8] Current Electricity
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Many electrical appliances and circuits are earthed grounded. What is the reason for this?
[8] Current Electricity
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Are switches connected in the neutral or live wire?
[8] Current Electricity
Chapter: [8] Current Electricity
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What do you mean by a solenoid?
[8] Current Electricity
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Can a copper wire be used as a fuse wire?
[8] Current Electricity
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What type of electricity is supplied to us at houses?
[8] Current Electricity
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The diagram shows two ways of connecting three lamps P, Q and R to A.C. supply of 220 V.
Name the two arrangements. Which of them would you prefer in a household circuit? Give a reason for your answer.
[8] Current Electricity
Chapter: [8] Current Electricity
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Tick(✓) the correct choice in the following:
When the length of a conductor is doubled the resistance of the conductor
will
[8] Current Electricity
Chapter: [8] Current Electricity
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Tick(✓) the correct choice in the following:
24 watt, 12 volt head lamp is fully lit by connecting it to a 12 volt
battery. The working resistance of the lamp is
[8] Current Electricity
Chapter: [8] Current Electricity
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Tick(✓) the correct choice in the following:
Which of the following quantities has the same value for all electrical
appliances connected to the ring main circuit in a house?
[8] Current Electricity
Chapter: [8] Current Electricity
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Tick(✓) the correct choice in the following:
The outer casing of an electric iron is generally connected to earth in order
to
[8] Current Electricity
Chapter: [8] Current Electricity
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Tick(✓) the correct choice in the following:
A three pin plug is connected to the lead for a 1 kW electric iron to be
used on a 250 V supply. Which of the following statements is not correct?
[8] Current Electricity
Chapter: [8] Current Electricity
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Define the following:
Electromotive force
[8] Current Electricity
Chapter: [8] Current Electricity
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