MEDIUM
KVPY Aptitude Test - Stream SA
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Two identical conducting rings of radius are in pure rolling over a horizontal conducting plane with the same speed (of centre of mass) but in opposite directions. A constant magnetic field is present pointing inside the plane of paper(ring). Then the potential difference between the highest points of the two rings is
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Important Questions on Magnetic Effect of Current and Electromagnetic Induction
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KVPY Aptitude Test - Stream SA
IMPORTANT
An inductor and a resistor are connected in series with a direct current source of . The maximum rate at which energy is stored in the magnetic field is
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KVPY Aptitude Test - Stream SA
IMPORTANT
In the circuit shown in figure, the switch was initially at position . After a sufficiently long time, the switch was thrown from position to position . The voltage drop across the resistor at that instant is
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KVPY Aptitude Test - Stream SA
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As shown in the figure, the key is closed, the direction of the induced current in the coil will be
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KVPY Aptitude Test - Stream SA
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A copper ring is tied to a string and suspended vertically. On bringing a magnet towards the ring, as shown in the figure
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KVPY Aptitude Test - Stream SA
IMPORTANT
The graph between the current and the time for an inductance coil is shown below. Which of the following graphs show the voltage-time variation
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KVPY Aptitude Test - Stream SA
IMPORTANT
A metallic rod completes its circuit as shown in the figure. The circuit is normal to a magnetic field of . If the resistance of the rod is the force required to move the rod with a constant velocity of is
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KVPY Aptitude Test - Stream SA
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A small square loop of wire of side is placed inside a large square loop of wire of side . The loops are coplanar and their centres coincide. The mutual inductance of the system is proportional to
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KVPY Aptitude Test - Stream SA
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A metallic square loop is moving in its own plane with velocity in a uniform magnetic field perpendicular to its plane as shown in the figure. An electric field is induced
