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Current Electricity

Current Electricity
Temperature coefficient of resistance is expressed in terms of

ohms/°C
ohms/ohm°C
mhos/°C
mhos/ohm°C

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Current Electricity
The resistance of a few meters of wire conductor in closed electrical circuit is

Low
Practically zero
Very high
High

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Current Electricity
A 3 Q resistor having 2 A current will dissipate the power of

2 watts
4 watts
6 watts
8 watts

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Current Electricity
An electric filament bulb can be worked from

DC supply only
Battery supply only
AC supply only
All of the listed here

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Current Electricity
An electrical lamp coonsumes 100 W of power. If the supply voltage is 220 V the energy consumed in 30 minutes is

5 kWh
5 kWh
0.05 kWh
0.005 kWh

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Current Electricity
Are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.

Semiconductors
Varistors
Thermistor
Variable resistors

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MORE MCQ ON Current Electricity

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