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Current Electricity
Insulators have _______ temperature co-efficient of resistance.
None of the listed here
Negative
Zero
Positive
None of the listed here
Negative
Zero
Positive
Answer
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Current Electricity
An electrical lamp coonsumes 100 W of power. If the supply voltage is 220 V the energy consumed in 30 minutes is
5 kWh
0.05 kWh
5 kWh
0.005 kWh
5 kWh
0.05 kWh
5 kWh
0.005 kWh
Answer
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Current Electricity
The resistance of a conductor varies inversely as
Are of cross-section
Temperature
Length
Resistivity
Are of cross-section
Temperature
Length
Resistivity
Answer
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Current Electricity
A wire having very high value of conductance is said to be
None of the listed here
Very good conductor
Insulator
Moderately good conductor
None of the listed here
Very good conductor
Insulator
Moderately good conductor
Answer
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Current Electricity
At 0 K, germanium behaves as
A superconductor
An insulator
A ferromagnetic substance
A conductor
A superconductor
An insulator
A ferromagnetic substance
A conductor
Answer
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Current Electricity
All of the following are equivalent to watt except
Joules/sec.
(Amperes) ohm
Amperes/volt
Amperes × volts
Joules/sec.
(Amperes) ohm
Amperes/volt
Amperes × volts
Answer
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