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Current Electricity

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

0.8 ohm
0.6 ohm
0.4 ohm
1.0 ohm

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Current Electricity
Which of the following quantities remain the same in all parts of a series circuit?

Voltage
Resistance
Power
Current

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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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Current Electricity
A closed switch has a resistance of

Zero
About 50 ohms
About 500 ohms
Infinity

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Current Electricity
It becomes more difficult to remove

Third electron from the orbit
First electron from the orbit
Any electron from the orbit
Second electron from the orbit

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Current Electricity
A resistance having rating 10 ohms , 10 W is likely to be a

Metallic resistor
Variable resistor
Wire wound resistor
Carbon resistor

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