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Current Electricity

Current Electricity
What voltage drop will be there across a 1 kW electric heater whose resistance when hot is 40 Ω?

150 V
100 V
50 V
200 V

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Current Electricity
A field of force can exist only between

Two metal particles
Two ions
Two molecules
Two atoms

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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
Capacitor
Reactor
Resistor

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Current Electricity
The current in the circuit having constant resistance is tripled. The power increases

1/3 times
1/9 times
3 times
9 times

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Current Electricity
Voltage dependent resistors are used

As current stabilizers
To suppress surges
For inductive circuits
As heating elements

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Current Electricity
Nichrome wire is an alloy of

Chromium and vanadium
Copper and silver
Lead and zinc
Nickel and chromium

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