Question Bank
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The Lenz's law is a consequence of the law of conservation of:
Four identical resistors each of resistance R are connected to form a square. The equivalent resistance between opposite corners is:
In a step-up transformer, the current in the secondary coil compared to the primary coil is:
Which of the following materials has a negative temperature coefficient of resistance?
What is the equivalent resistance of three resistors of 3 Ohms each connected in parallel?
If the current through a resistor is doubled, the power dissipated becomes:
A heater is marked 220V, 2200W. What is the current flowing through it?
The work done in moving a unit positive charge from one point to another is called:
Which law states that the induced current always opposes the cause that produces it?
Resistance of a wire of length L and area A is R. If another wire of same material has length 2L and area 2A, its resistance will be:
Which of the following does NOT affect the strength of an electromagnet?
A wire has resistance 10 Ohms. If it is cut into two equal halves and connected in parallel, the new resistance is:
What is the equivalent resistance between A and B in the provided circuit diagram?
In an AC circuit, the ratio of peak voltage to RMS voltage is:
A current of 0.5 A is drawn by a filament of an electric bulb for 10 minutes. The amount of electric charge that flows through the circuit is: