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Current Electricity

Current Electricity
A copper wire has a resistance of 10 Ω. It is stretched by one-tenth of its original length. Then its resistance will be

12.1 Ω
9 Ω
10 Ω
11 Ω

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Current Electricity
Voltage dependent resistors are used

To suppress surges
As heating elements
As current stabilizers
For inductive circuits

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Current Electricity
No current flow between two charged bodies if they have same

Potential
Charge
Capacity
None of the listed here

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Current Electricity
Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as

25 : 4
2 : 5
4 : 25
5 : 2

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Current Electricity
In case of liquids, ohm's law is

There is no relation between current and p. d
None of the listed here
Fully obeyed
Partially obeyed

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Current Electricity
All of the following are equivalent to watt except

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

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