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Current Electricity

Current Electricity
With rise in temperature the resistance of pure metals

Decreases
Remains constant
Increases
First increases and then decreases

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

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

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

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

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Current Electricity
In which of the following substances the resistance decreases with increase in temperature?

Silver
Constantan
Carbon
Copper

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Current Electricity
The resistance of conductor varies inversely as

Length
Resistivity
Area of cross-section
Temperature

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Current Electricity
An open resistor, when checked with an ohmmeter reads

Low but not zero
Zero
Infinite
High but within tolerance

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