When the number of turns in the two circular coils closely wound are doubled (in both) their mutual inductance becomes

When the number of turns in a coil is doubled without any change in the length of the coil, its self-inductance becomes

When the number of turns in a coil is doubled without any change in the length of the coil, its self-inductance becomes

When the number of turns in a coil is doubled without any change in the length of coil its selfinductance becomes ________ .

If number of turns in primary and secondary coils is increased to two times each, the mutual inductance

If two coil are wound on a soft iron core the mutual induction is