A simple a.c. generator having a constant magnetic field is connected to a resistive load. Explain with reasons what will be the effects of doubling its speed of rotation on the following:
frequency of rotation.

A simple a.c. generator having a constant magnetic field is connected to a resistive load. Explain with reasons what will be the effects of doubling its speed of rotation on the following: mechanical power requried to rotate the generator.

A simple a.c. generator having a constant magnetic field is connected to a resistive load. Explain with reasons what will be the effects of doubling its speed of rotation on the following: the generated e.m.f.

In an a.c. generator, coil of N turns and area A is rotated at v revolutions per second in a uniform magnetic field B. Write the expression for e.m.f. produced.

A conductor of length l is connected to a d.c. source of potential V. If the length of the conductor is tripled by streaching it, keeping V constant, explain how do the following factors vary in the conductor. 1) drift velocity 2) resistance

A coil of number of turns N, area A, is rotated at a constant angular speed omega, in a uniform magnetic field B, and connected to a resistor R. Deduce expressions for : power dissipated in the coil.

A magnet is suspended vertically from a fixed point by means of a spring, as shown in the figure. One end of the magnet hangs inside a coil of wire. The coil is connected in series with a resistance R. The magnet is displaced vertically a small distance D and the released. shown in the figure variation with time t of the vertical displacement d of the magnet from its equilibrium position. State and explain, by reference to electromagnetic induction, the nature of the oscillations of the magnet. Calculate the angular frequency omega_0 of the oscillations.

A conducting rod of 1 m length is rotated with a frequency of 50 rev/s, with one end hinged at the centre and the other end at the circumference of a circular metallic ring of radius 1 m, about an axis passing through the centre and perpendicular to the plane of the ring. A constant and uniform magnetic field of 1 T parallel to the axis is present everywhere. What is the emf between the centre and the metallic ring?

An electron having mass m, charge q and kinetic energy E enters a uniform magnetic field B perpendicularly. Then its frequency of rotation will be

Draw a shematric sketch of an a.c. generator describing its basic elements. State briefly its working principle. Show a plot of variation of alternating e.m.f. Versus time generated by a lopp of wire rotating in a magnetic field.

A conductor of length 'l' is rotated about one of its ends at a constant angular speed omega in a plane perpendicular to a uniform magnetic field B. plot graphs to show variations of the emf induced across the ends of the conductor with length of the conductor l.