The number of turns of a coil is doubled. How will its self-inductance be effected?

If N is the number of trns in a coil, the value of self-inductance varies as

Define inductive effect.

A coil is wound on a frame of rectangular cross - section. If all the linear dimensions of the frame are increased by a factor 2 and the number of turns per unit length of the coil remains the same, self - inductance of the coil increases by a factor of

The dimensions of self inductance are

If the total number of turns of solenoid is doubled, and simultaneously the length of the solenoid is doubled, then the magnetic field inside the solenoid is also doubled. Is this statement true.

How does the mutual inductacne of a pair of coils get affected when the number of turns in each coil is decreased? Explain your answer in each case?