HARD
Physics
IMPORTANT
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A triangular loop, as shown in the figure, is being pulled out at from a uniform magnetic field with a constant velocity The total resistance of the loop is constant and is equal to . Then, the variation of power produced in the loop with time will be,
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Important Questions on Electromagnetic Induction and Alternating Currents
EASY
Physics
IMPORTANT
A current carrying infinitely long wire is kept along the diameter of a circular wire loop, without touching it. The correct statement (s) is (are):
EASY
Physics
IMPORTANT
A conducting rod is moved with a constant velocity in a magnetic field. A potential difference appears across the two ends
EASY
Physics
IMPORTANT
A rod AB moves with a uniform velocity in a uniform magnetic field as shown in the figure
MEDIUM
Physics
IMPORTANT
A bar magnet is moved along the axis of a copper ring placed far away from the magnet. Looking from the side of the magnet, an anticlockwise current is found to be induced in the ring. Which of the following may be true?
MEDIUM
Physics
IMPORTANT
A town situated away from a power house at requires of electric power at. The resistance of transmission line carrying power is . The town gets power from the line through a step-down transformer at a substation in the town. Which of the following is/are correct
MEDIUM
Physics
IMPORTANT
of electric power can be transmitted to a distant station at (i) or (ii) Which of the following is correct.
EASY
Physics
IMPORTANT
An LR circuit with a battery is connected at . Which of the following quantities is not zero just after the connection?
HARD
Physics
IMPORTANT
The switch in figure is connected to position a for a long time interval. At the switch is thrown to position . After this time,
