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Current Electricity

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

Infinite
Low but not zero
High but within tolerance
Zero

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Current Electricity
Ohm's law is not applicable to

Carbon resistors
Vaccum tubes
Circuits with low current densities
High voltage circuits

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Current Electricity
With rise in temperature the resistance of pure metals

Remains constant
Decreases
First increases and then decreases
Increases

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Current Electricity
An instrument which detects electric current is known as

Rheostat
Galvanometer
Wattmeter
Voltmeter

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Current Electricity
The insulation on a current carrying conductor is provided

None of above factors
Both of the listed here
To prevent leakage of current
To prevent shock

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Current Electricity
The resistance of a conductor varies inversely as

Length
Resistivity
Temperature
Are of cross-section

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