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Current Electricity

Current Electricity
With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals

60 W
20 W
10 W
40 W

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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
When one lag of parallel circuit is opened out the total current will

None of the listed here
Become zero
Increases
Decreases

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Current Electricity
Voltage dependent resistors are usually made from

Charcoal
Graphite
Nichrome
Silicon carbide

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Current Electricity
The SI unit of power is

Watt
Coulomb
Watt-hour
Henry

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Current Electricity
The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is

Positive
Zero
About 2 ohms per degree
Negative

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