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When a charged particle enters in a uniform magnetic field, its kinetic energy

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Important Questions on Magnetic Effect of Current
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Two particles x and y have equal charges and possessing equal kinetic energy enter in a uniform magnetic field and describe circular path of radius of curvature r1 and r2 respectively. The ratio of their masses is :-

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Flux passing through loop is proportional to

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Two long wires hating current as shown placed at separation . The magnetic field at mid-point is:-

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A square loop of resistance 11 having area 0.15 m2 is placed in magnetic field of 2T. Find frequency by which it should be rotated so that average power dissipated in it is 100 W.

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Assertion: Charge is invariant.
Reason: Charge does not depend on speed or frame of reference.

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An electron having mass and kinetic energy enters in uniform magnetic field perpendicularly. Then, its frequency of uniform circular motion will be,

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In a mass spectrograph, an ion of mass number and charge and an ion of mass number and charge enter in transverse magnetic field with same velocity. The ratio of radii of their paths, respectively, is

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A charged particle is moving in the direction of a magnetic field. The magnetic force acting on the particle,
