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Current Electricity

Current Electricity
The current in the circuit having constant resistance is tripled. The power increases

9 times
1/9 times
3 times
1/3 times

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Current Electricity
Which method can be used for absolute measurement of resistances?

Releigh method
Ohm's law method
Lorentz method
Wheastone bridge method

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Current Electricity
A wire having very high value of conductance is said to be

Very good conductor
None of the listed here
Insulator
Moderately good conductor

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Current Electricity
Conductivity is the reciprocal of

Resistance
None of the listed here
Current density
Resistivity

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Current Electricity
The resistance of a copper wire 200 m long is 21 ω. If its thickness (diameter) is 0.44 mm, its specific resistance is around

1.6 x 10-8 ω-m
1.2 x 10-8 ω-m
1.4 x 10-8 ω-m
1.8 x 10-8 ω-m

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Current Electricity
All of the following are equivalent to watt except

Amperes × volts
(Amperes) ohm
Joules/sec.
Amperes/volt

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