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CURRENT ELECTRICITY

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
The minimum charge on an ion is

Equal to the charge of an electron
Equal to the atomic number of the atom
None of these
Equal to the charge of the number of electrons in an atom (#) zero

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Current Electricity
Current velocity through a copper conductor is

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

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Current Electricity
For which of the following 'ampere second' could be the unit?

Power
Energy
Reluctance
Charge

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Current Electricity
It becomes more difficult to remove

First electron from the orbit
Any electron from the orbit
Second electron from the orbit
Third electron from the orbit

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