A metallic rod held horizontally along east-west direction is allowed to fall under gravity.Will there be an e.m.f..induced at its ends?Justify your answer.

A metallic ring of mass m and radius i (ring being horizontal) is falling under gravity in a region having a magnetic field . If z is the vertical direction, the z- component of magnetic field is B_z = B_0(1 + lambda z) If R is the resistance of the ring and if the ring falls with a velocity v, find the power lost in the resistance . If the ring has reached a constant velocity, use the conservation of energy to determine v in terms of m, B , lambda and acceleration due to gravity g.

A 10 metre wire kept in east-west direction is falling with velocity 5m//sec perpendicular to the field 0.3 xx 10^-4 wb//m^2 . The induced e.m.f. across the terminal will be

A rod of length l is rotated about its one end, perpendicular to a magnetic field of induction B What is the e.m.f induced in the rod

The horizontal telegraph wire 100m long,oriented along magnetic east west falls freely under gravity to the ground with a speed of 20 cm/s. The horizontal component of earth's magnetic field is 4.0 xx 10^-5 tesla. Find the e.m.f. induced in the wire at the instant the wire strikes the ground.

A metal rod 1/ (sqrt(pi)) meter long rotates about one of its ends perpendicular to a plane whose magnetic induction is 4xx10^-3T . Calculate the number of revolutions made by the rod per second if the e.m.f. induced between the ends of the rod is 16mV.

An induced e.m f has no direction of its own,why?

Choose the correct options A uniform rod of mass 2 m is held horizontal by two sturdy, practically inextensible vertical strings tied at its ends. A boy of mass 3 m hangs himself at one third length of the rod. Ratio of the tension in the string close to the boy to that in the other string is

A coil of dimensions 30 cm xx 20 cm is kept such that its plane is at right angles to the direction of uniform magnetic field of value 0.08 Wb/m^2 . Calculate the e.m.f . induced in the coil, If the value of field is reduced to 25 percent of the original value in 0.6 second.

A metallic rod of mass per unit length 0.5 kg m^(-1) is lying horizontally on a smooth inclined plane which makes an anlge of 30^(@) with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25 T is acting on it in the vertical direction. The current flowing in the rod to keep it stationary

A copper rod 1.5m long is rotated in a magnetic field of induction 6 xx 10^-5 (Wb)/m^2 .If it performs 1200 r.p.m.. find the e.m.f induced at its ends.