Electromagnetic...

The horizontal component of earth's magnetic field at a place is $$3\times 10^{-4}T$$ and the dip is $$\tan^{-1}\left (\dfrac {4}{3}\right )$$. A metal rod of length $$0.25\ m$$ is placed in $$N-S$$ direction and is moved at a constant speed of $$10\ cms^{-1}$$ towards the east. The emf induced in the rod will be

What should be the value of self inductance of an indicator that should be connected to $$220$$V, $$50$$Hz supply so that a maximum current of $$0.9$$A flows through it?

In A.C generator increasing no. of turns in coil :

In alternative current generator, AC current reverses its direction :

The part of the AC generator that passes the current from the coil to the external circuit is?

A conducting rod of Length $$L=0.1$$m is moving with a uniform speed $$v=0.2$$ m/s on conducting rails in a magnetic field $$B=0.5$$T as shown. On one side, the end of the rails is connected to a capacitor of capacitance $$C=20\mu F$$. Then the charges on the capacitor plates are.

The number of turns in the coil of an AC generator ar e$$100$$ and its cross-sectional area is $$2.5{m}^{2}$$. The coil is revolving in a uniform magnetic field of strength $$0.3T$$ with the uniform angular velocity of $$60rad/s$$. The value of maximum value produced is _____kV

If given arrangement is moving towards left with speed v, then potential difference between B and D and current in the loop are respectively.

A copper rod of length $$l$$ rotates about its end with angular velocity $$\omega$$ in a uniform magnetic field B. The emf developed between the ends of the rod if the field is normal to the plane of rotation is:

A wheel with 10 metallic spokes each 0.5 m long rotated with a speed of 120 rpm in a plane normal to the horizontal component of earth's magnetic field $$B_h$$ at a place. If $$B_h$$ = 0.4 G at the place. What is the induced emf between the axle and the rim of the wheel? (1 G = $$10^4$$ T)