Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be

Related MCQs

• A certain amount of current flows through a ring-shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil ?
• 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 in ductance will be
• In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will
• A 200 turn coil has an inductance of 12 mH. If the number of turns is increased to 400 turns, all other quantities (area, length etc.) remaining the same, the inductance will be
• What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200 ?
• A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by
• When both the inductance and resistance of a coil are doubled the value of
• The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength ?
• Energy stored by a coil is doubled when its current is increased by percent.
• The rate of rise of current through an inductive coil is maximum