Electromagnetic...

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

The magnetic flux through a circuit of resistance R changes by an amount ∆ϕ in time ∆t. The total independent of quantity of electric charge Q which passes during this time through any point of the circuit is given by

A coil having an area A₀ is placed in a magnetic field which changes from B₀ to 4B₀ in a time interval t. The e.m.f. induced in the coil will be

A copper ring is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. The acceleration of the falling magnet while it is passing through the ring is

A square coil of 10^–2m² area is placed perpendicular to a uniform magnetic field of intensity 10³ Wb/m². Themagnetic flux through the coil is

A magnet is brought towards a coil (i) speedly (ii) slowly, then the induced e.m.f./induced charge will be respecitively.

The direction of induced e.m.f. during electromagnetic induction is given by

A 50 turns circular coil has a radius of 3 cm, it is kept in a magnetic field acting normal to the area of the coil. The magnetic field B increased from 0.10 tesla to 0.35 tesla in 2 milliseconds. The average induced e.m.f. in the coils is