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Current Electricity
International ohm is defined in terms of the resistance of
The unit length of wire
A cube of copper
A column of mercury
A cube of carbon
The unit length of wire
A cube of copper
A column of mercury
A cube of carbon
Answer
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Related Question
Current Electricity
Resistance of a material always decreases if
Temperature of material is increased
Number of free electrons available becomes more
None of these
Temperature of material is decreased
Temperature of material is increased
Number of free electrons available becomes more
None of these
Temperature of material is decreased
Answer
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Current Electricity
Resistance of a tungsten lamp _____ as applied voltage increases.
Remains same
None of the listed here
Decreases
Increases
Remains same
None of the listed here
Decreases
Increases
Answer
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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
1.5
0.5
1
0.6
1.5
0.5
1
0.6
Answer
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Current Electricity
The insulation on a current carrying conductor is provided
None of above factors
To prevent shock
To prevent leakage of current
Both of the listed here
None of above factors
To prevent shock
To prevent leakage of current
Both of the listed here
Answer
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Current Electricity
If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes
0.8 ohm
1.0 ohm
0.6 ohm
0.4 ohm
0.8 ohm
1.0 ohm
0.6 ohm
0.4 ohm
Answer
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