SSC JE Electrical Engineering 23rd Jan 2018 Shift-2

Which one of the following is the S.I. unit of magnetic field strength?

Which one of the following is the CORRECTexpression for magnetic susceptibility?

Which one of the following is the CORRECT value of magnetic permeability in free space?

If the magnetic susceptibility of any material is less than zero then the material is .......

Determine the reluctance (in Amp-turns/Wb)of a coil, when the flux through the coil is 15 Wb and the produced mmf is 30 Amp-turns.

Determine the value of produced mmf(in Amp-turns) in a coil, if the coil has 120 turns and carrying a current of 0.1 A.

What will be the magnetic field strength (in A/m) of a material when the intensity of magnetization of the material is 0.064 Amp/m and the magnetic susceptibility of the material is $$0.52 \times 10^{-4}$$?

Determine the magnitude of EMF (in V) induced betweentheaxis of rotation and the rim of the disc, when the disc of radius 10 cm rotates with an angular velocity of 60 revolutions per second and placed in a magnetic field of 3 T acting parallel to the rotation of the disc.

Whatwill be the value of current (in A) in a 50 cm long air-core solenoid, if the value of magnetic field at the center of the solenoid is 5 mT and the solenoid has 300 turns?

Determine the maximum flux density (in T) of a material having eddy current coefficient of 2, thickness of 4 mm, volume of 20 cu. meter, which is supplied by a frequency of 50 Hz when the material has eddy current loss of 6 W.