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.

Draw a shematic sketch of an a.c. generator describing its basi elements. State briefly its working principle. Show a plot of variation of magnetic flux

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 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 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.

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 angular speed omega .

An a.c. generator consists of a coil of 50 turns and area 2.5 m^(2) rotating att an angular speed of 60 rad s^(-1) in a uniform magnetic field B = 0.3 T between two fixed pole pieces. The resistance of the circuit including that of coil is 500 Omega . Find Would the generator work if the coil were stationary and instead, the pole pieces rotated together with the same speed as above ?

A small retangular coil ABCD contains 140 turns of wire. The sides AB and BC of the coil are of length 4.5 and 2.8 cm respectively, as shown in the figure The coil is held between the poles of a large magnet so that the coil can rotate about an axis thorugh its centre. The magnet produces a uniform magnetic field of flux density B between its poles. When the current in the coil is 170 mA, the maximum torque produced in the coil is 2.1 xx 10^-3 N m . For the coil in the position for maximum torque, state whether the plane of the coil is parallel to, or normal to , the direction of the magnetic field.