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Current Electricity

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

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

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Current Electricity
Ohm's law is not applicable to

Dc circuits
Small resistors
Semi-conductors
High currents

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Current Electricity
Three resistance of 10 ohms, 15 ohms, and 30 ohm are connected in parallel. The total resistance of the combination is

10 ohms
15 ohms
5 ohms
55 ohms

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Current Electricity
The flow of current in solids is due to

Atoms
Nucleus
Electrons and ions
Electrons

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

Nichrome
Constant
Manganin
Copper

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Current Electricity
In which of the following substances the resistance decreases with increase in temperature?

Silver
Constantan
Carbon
Copper

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MORE MCQ ON Current Electricity

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