Questions
A ring of radius R has uniformly distributed charge. It spins about its axis with an angular velocity . P is a point on its axis at a distance x, from its centre. The velocity of light in vaccum is c. Then the ratio of magnetic field to the electric field at P is equal to
detailed solution
Correct option is D
E = Qx4πεoR2+x232; B = μoQωR24πR2+x232 ∴ BE = μoεoωR2x = ωR2xc2 ∴c = 1μoεoTalk to our academic expert!
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A charged particle of mass 2 x 10-12 kg carrying a charge of 4 x 10-9 coul is projected in a uniform magnetic field of 2 x 10-4 tesla with a velocity of 10 m/s making an angle of 60° with the magnetic field. If acceleration due to gravity in that field is zero, then length of path praversed by the particle in 1 minute is
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