When the number of turns in a toroidal coil is doubled, then the value of magnetic flux density will becomes-

If number of turns and current becomes double for any solenoid, then value of magnetic field becomes

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

When the current flowing in a circular coil is doubled and the number of turns of the coil in it is halved , the magnetic field at its centre will become

If length and number of turns becomes half for a solenoid then value of magnetic field becomes:-