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Current Electricity

Current Electricity
The resistance of human body is about

1000 ohm
25 ohm
10 ohm
200 ohm

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Current Electricity
Constantan wire is used for making starndard resistance because it has

High melting point
High specific resistance
Low specific resistance
Negligibly small temperature co-efficient of resistance

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Current Electricity
The resistance of a copper wire 200 m long is 21 ω. If its thickness (diameter) is 0.44 mm, its specific resistance is around

1.4 x 10-8 ω-m
1.6 x 10-8 ω-m
1.2 x 10-8 ω-m
1.8 x 10-8 ω-m

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

Power
Charge
Reluctance
Energy

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Current Electricity
Whether circuit may be AC. or D.C. one, following is most effective in reducing the magnitude of the current.

Inductor
Resistor
Reactor
Capacitor

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Current Electricity
Two resistances Rl and Ri are connected in series across the voltage source where Rl > Ri. The largest drop will be across

None of them
Either Rl or Ri
Rl
Ri

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