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Current Electricity

Current Electricity
All of the following are equivalent to watt except

Joules/sec.
Amperes/volt
(Amperes) ohm
Amperes × volts

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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

Zero
Negative
About 2 ohms per degree
Positive

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Current Electricity
Current velocity through a copper conductor is

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

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Current Electricity
The resistance of two wires is 25 Ω when connected in series and 6 Ω when joined in parallel. The resistance of each wire is

10 Ω, 20 Ω
20 Ω, 30 Ω
5 Ω, 10 Ω
10 Ω, 15 Ω

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Current Electricity
Sparking occurs when a load is switched off because the circuit has high

Capacitance
Inductance
Impedance
Resistance

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Current Electricity
Out of the following which is not a poor conductor?

Cast iron
Copper
Carbon
Tungsten

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MORE MCQ ON Current Electricity

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