Suppose a conducting rod (mass m, resistance R) rests on two frictionless and resistanceless parallel rails a distance l apart in a uniform magnetic field B (⊥ to the rails and to the rod) as in the figure. At t = 0 the rod is at rest and a source of emf is connected to the points a and b. Find a formula for the net electric field in the moving rod as a function of time for the case, when the source puts out a constant current I. Find a formula for the net electric field in the moving rod as a function of time for the case when the source puts out a constant emf E0.

Q: A rectangular metallic loop of dimensions ℓ and ω and resistance R moves with constant speed υ to…

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A: Given problem is related to megnetic feild effect.

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A: Write the expression of the rate of change in flux. dϕdt=ε

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A: option (e) is correct.

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A: a. the induced emf can be expressed as, ε=-Ndϕdt=-Nddt5t2-2t=202-10t=40-200tmV

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A: According to Faraday's second law  induced emf = rate of change of magnetic flux

Q: A solenoid ring with N = 3 loops is immersed in a uniform time-varying magnetic field (shown in the…

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Magnetic Force

A magnetic force arises when a charged particle or a current-carrying conductor is placed in a magnetic field. It is created because of the movement of the charged particles.