Derive an expression for induced emf developed when a coil of N tuuns and area of own section A is rotated at constant angular speed `omega` in a uniform magnetic field B.

Explain briefly, with the help of a labelled diagram, the basic principle of working of an a.c. generator. In an a.c. generator, coil of N turns and area A rotating with a constant angular speed ω in a uniform magnetic field B. Write the expression for the emf produced. A 100-turn coil of area 0.1m^(2) rotates at half a revolution per second. It is placed in a magnetic field 0.01 T perpendicular to the axis of rotation of the coil. Calculate the maximum voltage generated in the coil.

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.

(a) Draw a labelled diagrame of an ac generator. Obtain the expression for the emf induced in the rotating coil of N turns each of cross-sectional are A, in the presence of a magnetic field overset(to) (B) . (b) A horizonatal conducting rod 10m long extending from east to west is falling with a speed 5.0 ms ^(-1) at right angles to the horizontal component of the Earth's magnetic fields. 0.3 xx 10^(-4) Wb m^(-2) . Find the instantaneous value of the emf induced in the rod .

In the above question if the coil rotates with a constant angular velocity omega , the EMF induced in it

A circular coil of one turn of radius 5.0cm is rotated about a diameter with a constant angular speed of 80 revolutions per minute. A uniform magnetic field B=0.0IT exists in a direction perpendicular to the axis of rotation, the maximum emf induced, the average emf induced in the coil over a long period and the average of the squares of emf induced over a long period is

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.

(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.

A copper rod AB-of length / pivoted at one end A, rotates at constant angular velocity omega , at right angles to a uniformn magnetic field of induction B. The emf, developed between the mid point of the rod and end B is

Is an induced e.m.f developed in a conductor, when moved in a direction parallel to the magnetic field?

A coil of N turns and mean cross-sectional area A is rotating with uniform angular velocity omega about an axis at right angle to uniform magnetic field B. The induced emf E in the coil will be