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

Related MCQs

• 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
• 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 ?
• 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
• Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be
• 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 ?
• What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200 ?
• The self-inductance of the coil may be defined as equal to the e.m.f. induced in volts when the current in the circuit changes at the rate of unit weber turns.
• The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is_______Vs
• In case all the flux from the current in coil 1 links with coil 2, the co-efficient of coupling will be
• The inductance of a coil will increase under all the following conditions except