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Current Electricity

Current Electricity
The substances which have a large number of free electrons and offer a low resistance are called

Semi-conductors
Conductors
Inductors
Insulators

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

0.4 ohm
0.6 ohm
1.0 ohm
0.8 ohm

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Current Electricity
Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open

The other two bulbs will light
All three bulbs will light
There will be heavy current in the main line
Rest of the two bulbs will not light

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

Power
Current
Voltage
Resistance

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Current Electricity
If the efficiency of a machine is to be high, what should be low?

kWh consumed
True component of power
Input power
Losses

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Current Electricity
The example of non-ohmic resistance is

Copper wire
tungsten wire
Carbon resistance
Aluminium wire

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MORE MCQ ON Current Electricity

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