Magnetic effect of current: Oersted experiment, electromagnetic induction, electric motor, generator (working principle and use), general studies of alternating current and direct current

In India, the frequency of Alternating Current (AC) supply is

Who discovered the magnetic effect of electric current?

A wire carrying a current of 10 A and 200 cm in length is placed in a magnetic field of flux density 0.5 T. What is the force on the wire if it is placed at 30° angle to the field?

An alternating current I in amperes varies with time t in seconds as I = 4 sin(200 $\pi$ t). The r.m.s. values of the current and frequency are

The essential requirements for selection of material for transformer core are

A wheel with 10 metallic spokes each 0.5 m long is rotated with speed 120 revolutions/minute in a plane normal to horizontal component of Earth's magnetic field HE at a place. If HE = 4 × 10⁻⁵ T is at the place, what will happen to emf induced between axle and rim of wheel if same wheel has double metallic spokes ?

A live wire is hidden in a wall. Its position can be located with the help of

What is the frequency of direct current?

According to Faraday's law, the total charge induced in a conductor that is moved in a magnetic field depends upon :

The value of the magnetic field at a distance x from a long, straight current carrying conductor is proportional to

Lenz's law is a consequence of the law of conservation of

According to Faraday's law, the total charge induced in a conductor that is moved in a magnetic field depends upon

Lenz's law is a consequence of the law of conservation of :

An ac generator consist of a coil of 50 turns and area 2.5m² rotating at 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 the coil is 500 Ω. What is the maximum current drawn from the generator: