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Current Electricity

Current Electricity
Which of the following materials has the least resistivity ?

Lead
Mercury
Copper
Zinc

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Current Electricity
Electrical current is due to the flow of

Negative charges only
Both positive and negative charges
Positive charges only
Neutral particles only

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Current Electricity
In case of liquids, ohm's law is

Fully obeyed
Partially obeyed
There is no relation between current and p. d
None of the listed here

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Current Electricity
E. M. F. In a circuit

Decrease circuit resistance
None of the listed here
Increases circuit resistance
Maintains potential difference

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Current Electricity
For testing appliances, the wattage of test lamp should be

Very low
Any value
High
Low

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Current Electricity
Electric current is a

Vector quantity
Sometimes scalar and sometimes vector
Scalar quantity
Number only

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