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Current Electricity

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

0.4 ohm
1.0 ohm
0.8 ohm
0.6 ohm

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Current Electricity
Electrical current is due to the flow of

Negative charges only
Positive charges only
Neutral particles only
Both positive and negative charges

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Current Electricity
Voltage dependent resistors are usually made from

Charcoal
Nichrome
Graphite
Silicon carbide

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Current Electricity
The current in the circuit having constant resistance is tripled. The power increases

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

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Current Electricity
A field of force can exist only between

Two atoms
Two ions
Two metal particles
Two molecules

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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

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

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