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Current Electricity

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

Losses
Input power
kWh consumed
True component of power

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Current Electricity
Current velocity through a copper conductor is

nearly 3 x 108 m/s
of the order of a few ^.s/m
independent of current strength
the same as propagation velocity of electric energy

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Current Electricity
The maximum current rating for a 10 kΩ, 0.5 W resistor is

0.707 mA
28.28 mA
14.14 mA
7.07 mA

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Current Electricity
In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is

33 V
132 V
66 V
80 V

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Current Electricity
When one lag of parallel circuit is opened out the total current will

Decreases
None of the listed here
Become zero
Increases

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Current Electricity
At 0 K, germanium behaves as

A conductor
An insulator
A ferromagnetic substance
A superconductor

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MORE MCQ ON Current Electricity

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