Figure 4 below shows two thick metallic rails CD and GH kept parallel to each other apart. They are…
Physics20235 marksNumerical
Figure 4 below shows two thick metallic rails CD and GH kept parallel to each other $0\cdot8\text{ m}$ apart. They are joined to each other by a resistance wire R having a resistance of $5\,\Omega$. A thick metallic rod PQ rests on the rails. There is a uniform magnetic field $B = 0\cdot2\text{ T}$, which is perpendicular to the plane of the rails, pointing into the paper.
(a)[2.5]
Calculate magnitude and direction of the current induced in the rod PQ if it is moved towards right with a constant velocity $v = 36\text{ km/hr}$.
(b)[2.5]
The rod PQ is now made to perform simple harmonic motion with a frequency of $3\text{ Hz}$ and an amplitude of $4\text{ cm}$. Calculate the maximum value of the emf induced in the rod.
