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A bulb marked 12 V, 24 W operates on a 12 volt car battery for 20 minutes. Calculate:
(i) The current flowing through it, and
(ii) The energy liberated.
Chapter: [8] Current Electricity
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What is international convention of colour coding in a cable?
Chapter: [8] Current Electricity
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What should be the current rating of a fuse to be used with an electric appliance of rating 1.5 kW-220 V? How is the fuse connected with the appliance?
Chapter: [8] Current Electricity
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Explain briefly how a fuse protects an electric circuit.
Chapter: [8] Current Electricity
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Draw a labeled diagram of a three pin socket.
Chapter: [8] Current Electricity
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Under what circumstances does one get an electric shock from an electrical gadget?
Chapter: [8] Current Electricity
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An electric bulb is rated at 220 V, 100 W. What is its resistance? What maximum current can be passed through it?
Chapter: [8] Current Electricity
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Two resistors of 4 Ω and 6 Ω are connected in parallel. The combination is
connected across a 6 volt battery of negligible resistance. Calculate:
( i) The power supplied by the battery,
(ii) The power dissipated in each resistor.
Chapter: [8] Current Electricity
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Name the unit which a consumer pays as the cost of electricity.
Chapter: [8] Current Electricity
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State the commercial unit of electrical energy.
Chapter: [8] Current Electricity
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What do you mean by 'power-voltage' rating of electrical appliances?
Chapter: [8] Current Electricity
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Name the physical quantity which equals the product of voltage and current.
Chapter: [8] Current Electricity
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The marking on an electric bulb reads; 200 V, 60 W. What does it mean?
Chapter: [8] Current Electricity
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The resistance of 100 W (220 V) bulb is greater than that of 60 W (220 V) bulb. Is it true or false?
Chapter: [8] Current Electricity
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What will be the current drawn by an electric bulb of 40 W when it is connected to a source of 220 V?
Chapter: [8] Current Electricity
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What do you mean by watt-hour?
Chapter: [8] Current Electricity
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What do you mean by direct current?
Chapter: [8] Current Electricity
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What do you mean by A.C.?
Chapter: [8] Current Electricity
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How does an alternating current differ from the direct current?
Chapter: [8] Current Electricity
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Which type of current does a generator with commutator produce?
Chapter: [8] Current Electricity
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