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A coil and a bulb are connected in series with a DC source, a soft iron core is inserted in the coil, then the intensity of the

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The magnetic potential energy stored in a certain inductor is `25 mJ`, when the current in the inductor is `60 mA`. This inductor is of

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The mutual inductance `M_(12)` of coil 1 with respect to coil

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There are two long co-axial solenoids of same length `l`. The inner & outer coils have radii `r_1 & r_2` and number of turns per unit length `n_1 & n_2`, respectively. The ratio of mutual inductance to the self-inductance of the inner coil

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When the magnetic flux linked with a conducting wire loop changes with time, an ................is induced in the

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In electromagnetic induction, the induced charge in a coil is independent

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If the resistance of a conductor is infinite. The power required to move a conductor in a uniform magnetic field is

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The core of a transformer is laminated to

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The self-inductance of a coil is L. Keeping the length and area same, the number of turns in the coil is increased to four times. The self-inductance of the coil will be

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Which of the following statement(s) is/are

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Which of the following statement(s) is/are

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A square loop is symmetrically placed between two infinitely long current carrying wires in the same direction. Magnitude of currents in both the wires are same. Now, match the Column I with Column II and select the correct answer from the codes given below Column I Column II A. Loop is moved p. Induced current towards right in the loop is clockwise. B. Loop is moved q. Induced current towards left in the loop is anti-clockwise. C. Wire-1 is r. Power in the moved towards loop is zero. left

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Match the Column I (planar loops of different shapes) with Column II (direction of induced current) and select the correct answer from the codes given

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Assertion: Magnetic flux of a magnetic field B passing through an area A is given by the relation `phi= B • A`. Reason: Quantity obtained by product of two vectors is always

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Assertion: Magnetic flux and the electric flux have the same units. Reason: Flux passing through a surface does not gives an idea about the field lines crossing that

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Assertion: When two magnets are brought closer to each other, then they will always repel each other. Reason: According to Lenz’s law induced effects do not always opposes the

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Assertion: If a straight wire is moved in a magnetic field, no emf will be induced across its two ends as the circuit is not closed. Reason: Since, the circuit is not closed, induced current will be

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Assertion: Faraday’s laws are consequence of conservation of energy. Reason: Earth’s magnetic field can induce

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Assertion: Inductance coil are made of copper. Reason: Induced current is more in wire having less

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Assertion: Eddy currents are undersirable. Reason: Eddy currents heat up the core and dissipate electrical energy in the form of

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