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Current Electricity

Current Electricity
Resistance of 220 V, 100 W lamp will be

4840 Q
48.4 Q
4.84 Q
484 ft

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Current Electricity
If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes

0.8 ohm
1.0 ohm
0.4 ohm
0.6 ohm

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Current Electricity
The thickness of insulation provided on the conductor depends on

None of the listed here
Both magnitude of voltage and current
The magnitude of current flowing through it
The magnitude of voltage on the conductor

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Current Electricity
Are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.

Varistors
Variable resistors
Semiconductors
Thermistor

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Current Electricity
In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is

33 V
80 V
132 V
66 V

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Current Electricity
All of the following are equivalent to watt except

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

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