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Current Electricity

Current Electricity
A closed switch has a resistance of

Zero
About 50 ohms
Infinity
About 500 ohms

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Current Electricity
When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will

Decrease
Remain constant
Increase
None of these

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Current Electricity
The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other?

64 Q
36 Q
18 Q
48 Q

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Current Electricity
If the efficiency of a machine is to be high, what should be low?

kWh consumed
True component of power
Losses
Input power

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Current Electricity
All good conductors have high

Conductance
Resistance
Reluctance
Thermal conductivity

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Current Electricity
What voltage drop will be there across a 1 kW electric heater whose resistance when hot is 40 Ω?

100 V
150 V
50 V
200 V

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MORE MCQ ON Current Electricity

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