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Current Electricity

Current Electricity
All of the following are equivalent to watt except

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

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

Copper
Constant
Manganin
Nichrome

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Current Electricity
Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct?

100 W lamp will glow brighter
Both lamps will glow equally bright
40 W lamp will glow brighter
40 W lamp will fuse

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Current Electricity
Varistors are

Carbon resistors
Insulators
Resistor with zero temperature co-efficient
Non-linear resistors

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Current Electricity
Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be

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

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Current Electricity
A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is

4.6 A, 9.6 A
4.6 A, 6.9 A
6.4 A, 6.9 A
6.4 A, 9.6 A

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