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Current Electricity

Current Electricity
If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes

1.0 ohm
0.4 ohm
0.6 ohm
0.8 ohm

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

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

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Current Electricity
If an electric current is passed through a nerve, the man

Becomes insensitive to pain
Begins to weep
Is excited
Begins to laugh

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Current Electricity
An instrument which detects electric current is known as

Galvanometer
Rheostat
Wattmeter
Voltmeter

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Current Electricity
Which of the following materials has the least resistivity ?

Zinc
Lead
Copper
Mercury

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Current Electricity
Temperature coefficient of resistance is expressed in terms of

ohms/ohm°C
ohms/°C
mhos/ohm°C
mhos/°C

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