A metallic wire 1 m in length is moving normally across a field of 0.1T with a speed of `5ms^(-1)`. Find the emf between the ends of the wire.

A metal rod of length L meter rotates about one end in a vertical plane at right angles to the magnetic-meridian. Frequency of revolution is f Hz.If the horizontal component of Earth's magnetic field is H Tesla then find the expression of inducted emf between the ends of the rod.

In a chamber , a uniform magnetic field of 6.5G(1G=10^−4T) is maintained. An electron is shot into the field with a speed of 4.8×10^6m/s normal to the field. Determine the radius of the circular orbit.

A wire is under tension of 32N and the length between the two bridges is 1 metre.A 10 metre length of the sample has a mass of 2g.Deduce the speed of transverse waves on the wire and the frequency of the fundamental.

A metal rod of length l is placed normal to a uniform magnetic field B. The rod moves with velocity v perpendicular to the field. Show that motional emf across its ends is Blv.

A bullet of mass 50 g moving with a speed of 500 ms^-1 is brought to rest in 0.1 sec. Find the impulse and average force.

Two cell of emf. 1.5v and 2 v and internal resistance 2 and 1Omega respectively have their negative terminal joined by a wire of 6Omega and positive terminal by another wire of 4Omega A third resistance of 8Omega connected mid point of these wire. Find the potential difference at the end of the third wire.

A wheel with 25 metallic spokes each 0.4m long is rotated with a speed of 150 rev//min in a plane normal to the horizontal components of earth's magnetic field H_B at a place. If H_E=0.4G at the place, what is the induced emf between the axle and the rim of the wheel?