EASY
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IMPORTANT
Earn 100
Assertion: Charge is invariant.
Reason: Charge does not depend on speed or frame of reference.
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Important Questions on Magnetic Effect of Current
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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,
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An electron of kinetic energy of is revolving on a circular path in magnetic field . Then, the radius of its circular path is,
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An electron moves with velocity in a uniform transverse magnetic field on circular path of radius . Then, for it is,
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A proton, deuteron and an -particle are accelerated by same potential. They enter in uniform magnetic field perpendicularly. The ratio of radii of circular paths, respectively, are,
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A charged particle through a magnetic field in a direction perpendicular to it. Then the
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A magnetic field,
