The co-efficient of coupling between two air core coils depends on____________?

Related Mcqs:

Which of the following circuit element stores energy in the electromagnetic field ?

A. Inductance B. Condenser C. Variable resistor D. Resistance...

The core of a coil has a length of 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will be_____________?

A. 3 mH B. 12 mH C. 24mH D. 48mH...

An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is____________?

A. 20 Wb B. 2 Wb C. 0.2 Wb D. 0.02 Wb...

If the coil is wound on an iron core the flux through it will_______________?

A. decrease B. become zero C. remain the same D. increase...

A coil of wire is arranged with its plane perpendicular to a uniform magnetic field o flux density B. when the radius of the coil increases from r1 to r2 in time Δt then what is the emf induced in the coil ?

A. ωB/r22-r12/Δt B. ωB(r2-r1)2/Δt C. ωB(r22-r12)/Δt D. ωB(r22+r12)/Δt...