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Current Electricity

Current Electricity
Which of the following is the best material for making connecting wires?

Constant
Nichrome
Copper
Manganin

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Current Electricity
The SI unit of power is

Watt-hour
Coulomb
Watt
Henry

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Current Electricity
A closed switch has a resistance of

About 500 ohms
Zero
About 50 ohms
Infinity

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Current Electricity
The filament of electrical bulb is made of

Aluminium
Steel
Nickel
Tungsten

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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
About 2 ohms per degree
Negative
Zero

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Current Electricity
Which of the following statement is true both for a series and a parallel D.C. circuit?

Elements have individual currents
Power are additive
Voltages are additive
Currents are additive

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