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 ?

Related MCQs

• 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 ?
• 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
• What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m ?
• A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ?
• The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as
• A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be
• Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be
• In case all the flux from the current in coil 1 links with coil 2, the co-efficient of coupling will be
• A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by