SSC JE Electrical Engineering 22nd Jan 2018 Shift-2

The S.I. unit magnetic permeance is __________.

Which one of the following is the CORRECT expression of magnetic reluctance?

Determine the produced mmf (in Amp-turns) in a magnetic circuit if it has 60 turns and carrying a current of 0.5 A.

Magnetic flux through any closed surface is ____________.

Determine the magnitude of induced EMF (in V) in a coil, if the current changes from +2 A to -2 A in 0.5 seconds and the coefficient of mutual induction is 0.5.

Determine the self-inductance (in mH) of a 4 m long air-cored solenoid, if the solenoid has a cross sectional area of 0.02 square meter and has 60 turns.

Determine the value of magnetic field (in mT) at the centre of a 20 cm long solenoid, if the solenoid has 200 turns and carrying a current of 4 A.

What will be the magnitude of magnetic field (in T) acting parallel to the rotation of the disc of diameter 20 cm when the magnitude of EMF induced between the axis of rotation and the rim of the disc is 10 V and the angular speed of rotation of disc is 20 revolutions per second.

Determine the magnetic susceptibility of a material, if the field strength of the materials is $$ 0.8 \times 10^{5} A.m^{-1} $$ and the magnitude of magnetization is $$ 0.97 \times 10^{5} A.m^{-1}.

What will be the magnitude of the induced EMF (in V) in a coil of area of 100 square centimeters with 200 turns, If the coil is removed from a magnetic field of 10 T acting at right angles to the coil in 1 second.