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Current Electricity

Current Electricity
Which of the following is the best conductor of electricity?

Silver
Copper
Zinc
Gold

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Current Electricity
Resistance of a material always decreases if

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

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Current Electricity
Nichrome wire is an alloy of

Nickel and chromium
Lead and zinc
Chromium and vanadium
Copper and silver

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Current Electricity
A closed switch has a resistance of

About 500 ohms
About 50 ohms
Infinity
Zero

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Current Electricity
The resistance of a straight conductor is independent of

Shape of cross-section
Material
Temperature
Cross-sectional area

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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

0.5
0.6
1
1.5

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MORE MCQ ON Current Electricity

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