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Current Electricity

Current Electricity
A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is

1000 Ω
400 Ω
800 Ω
600 Ω

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Current Electricity
A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is

4.6 A, 9.6 A
6.4 A, 9.6 A
6.4 A, 6.9 A
4.6 A, 6.9 A

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Current Electricity
If an electric current is passed through a nerve, the man

Begins to laugh
Begins to weep
Becomes insensitive to pain
Is excited

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Current Electricity
Resistance of a material always decreases if

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

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Current Electricity
Current velocity through a copper conductor is

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

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Current Electricity
The flow of current in solids is due to

Nucleus
Electrons and ions
Atoms
Electrons

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