Q221
Open questionWhich one of the following statements about bar magnet is correct?
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Physics GK · all questionsElectricity and Magnetism
Electricity and Magnetism
practice.
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Q222
Open questionConsider the following statements.
Assertion (A): Lightning conductors prevent buildings from damages in the event of lightning strike.
Reason (R): The electric charge conduct to ground through the wire, instead of passing through the structure.
Select the correct answer:
Assertion (A): Lightning conductors prevent buildings from damages in the event of lightning strike.
Reason (R): The electric charge conduct to ground through the wire, instead of passing through the structure.
Select the correct answer:
Select an option to see the answer and solution.
Q223
Open questionIf the value of V/I is a constant, then what is it called?
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Q224
Open questionThe SI unit of electric field is
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Q225
Open questionWhen a current of 0.5A flows through a filament of the electric bulb. Then amount of electric charge flows through a circuit is 300C, Calculate the time.
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Q226
Open questionThe temperature of the filament of lighted electric bulb is generally
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Q227
Open questionWhen many resistance in a circuit are connected in series, the value of current in each resistance is:
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Q228
Open questionIf there is an increase in current in a circuit with 5 ohms resistance, the voltage-
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Q229
Open questionIn a circuit diagram, 
The given symbol is used as follows:
The given symbol is used as follows:Select an option to see the answer and solution.
Q230
Open questionThe value of 1 kilowatt hour is
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Q231
Open question. . . . . . . . metal is used to make the filament of a light bulb-
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Q232
Open questionAn element offers high resistance for conduction is called:
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Q233
Open questionMagnetic keepers are used to protect magnets from
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Q234
Open questionWhich of the following is not based on practical applications of thermal effects of electricity?
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Q235
Open questionHow much current will flow through a body if it touches the terminal 1,00,000Ω resistance of a 12 volt battery?
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Q236
Open questionLet us consider a copper wire having radius r and length l. Let its resistance be R. If the radius of another copper wire is 2r and the length is , then the resistance of this wire will be
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Q237
Open questionElectricity consumption bill is based on the measurement of
1. Watt
2. Voltage
3. Ohm
4. Ampere
Select your answer:
1. Watt
2. Voltage
3. Ohm
4. Ampere
Select your answer:
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Q238
Open question"The sum of emf's and potential differences around a closed loop equals zero" is a consequence of
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Q239
Open questionWhich of the following instruments is used to measure electric current?
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Q240
Open questionWhich of the following is an example of the conversion of electrical energy into mechanical energy?
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