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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
1.0 ohm
0.4 ohm

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Current Electricity
The weight of an aluminium conductor as compared to a copper conductor of identical cross-section, for the same electrical resistance, is

0.6
0.5
1
1.5

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Current Electricity
If the number of valence electrons of an atoms is less than 4,the substance is usually

A semiconductor
A conductor
None of the listed here
An insulator

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

Inductors
Conductors
Semi-conductors
Insulators

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Current Electricity
Resistance of a material always decreases if

Temperature of material is increased
None of these
Number of free electrons available becomes more
Temperature of material is decreased

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

Increases
None of the listed here
Become zero
Decreases

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MORE MCQ ON Current Electricity

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