An a.c. generator consists of a coil of 2000 turns each of area `80 cm^(2)` and rotating at an angular speed of 200 rpm in a uniform magnetic field of `4.8 xx 10^(-2) T`. Calculate the peak and rms value of emf. Induced in the coil

An a.c generator consists of a coil of 1000 turns each of area 100 cm^(2) and rotating at an angular speed of 100 rpm in a uniform magnetic field fo 3.6 xx 10^(2) T. Find the peak and r.m.s value of e.m.f induced in the coil.

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 (i) the max. current drawn from the generator. (ii) What will be the orientaiton of the coil w.r.t. the magnetic field to have (a) maximum (b) zero magnetic flux ? (iii) Would the generator work if the coil were stationary and instead, the pole pieces rotated together with the same speed as above ?

An a.c. generator consists of a coil of 100 turns and cross sectional area of 3 m^(2) , rotating at a constant angular speed of 60 rad//sec in a uniform magnetic field of 0.04 T. The resistance of the coil is 500 Omega . Calculate (i) maximum current drawn from the generator and (ii) max. power dissipation in the coil.

An AC generator consists of a coil of 100 turns and area 5 m^2 rotating at an angular speed of 60 rad/s in a uniform magnetic field B =0.5 T between two fixed pole pieces. Find the peak value of voltage drawn from generator.

The coil of an a.c. generator has 100 turns, each of cross sectional area 2 m^(2) . It is rotating at a constant angular speed of 30 radians // s, in a uniform magnetic field of 2 xx 10^(-2) T. What is the maximum power dissipated in the circuit, if the resistance of the circuit including that of the coil is 600 Omega ?

An AC generator consists of a coil of 200 turns and area of 5 m^(2) rotating at a constant angular speed of 60 rad /s in a uniform magnetic field of 0.05 T. The resistance of the coil is 400 omega . Calculate maximum current drawn from the generator .

A coil of 1000 turns each of area 1.2m^(2) is rotating about an axis in its plane and perpendicular to uniform magnetic field of induction 2xx10^(-3)T . If it performs 300 rpm. The peak value of induced emf is

A circular coil of cross-sectional area 200 cm^(2) and 20 turns is rotated about the vertical diameter with angular speed of 50 rad//s in a uniform magnetic of 3.0 xx 10^(-2) T . Calculate the maximum value of current in the coil.

(a) Draw a schematic diagram of an AC generator. Explain is working and obtain the expression for the instantaneous value of the emf in terms of the magnetic field B, number of turns N of the coil of area A rotating with angular frequency omega . Show how an alternating emf is generated by loop of wire rotating in a magnetic field. (b) A circular coil of radius 10 cm and 20 turns is rotated about its vertical diameter with angular speed of 50 rad s^(-1). in a uniform horizontal magnetic field of 3.0xx10^(-2)T . (i) Calculate the maximum and average emf induced in the coil. (ii) If the coil forms a closed loop of resistance 10 Omega , calculate the maximum current in the coil and the average power loss due to Joule heating.