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Current Electricity
A copper wire is stretched so that its length is increased by 0.1 % . The change in its resistance is
None of the listed here
0.4%
0.3%
0.2%
None of the listed here
0.4%
0.3%
0.2%
Answer
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Related Question
Current Electricity
Conductivity is the reciprocal of
Resistivity
Current density
None of the listed here
Resistance
Resistivity
Current density
None of the listed here
Resistance
Answer
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Current Electricity
A copper wire has a resistance of 10 Ω. It is stretched by one-tenth of its original length. Then its resistance will be
10 Ω
11 Ω
9 Ω
12.1 Ω
10 Ω
11 Ω
9 Ω
12.1 Ω
Answer
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Current Electricity
Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be
3 times
1/9 times
1/3 times
9 times
3 times
1/9 times
1/3 times
9 times
Answer
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Current Electricity
Which of the following statement is true both for a series and a parallel D.C. circuit?
Currents are additive
Voltages are additive
Power are additive
Elements have individual currents
Currents are additive
Voltages are additive
Power are additive
Elements have individual currents
Answer
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Current Electricity
When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will
Remain constant
Decrease
Increase
None of these
Remain constant
Decrease
Increase
None of these
Answer
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