SSC JE Electrical Engineering 25th Jan 2018 Shift-2
For the following questions answer them individually
What will be the coefficient of self-induction (in H) of the coil, if the current changes from +4 A to -4 A in 0.10-seconds and the induced EMF is 16 V?
Calculate the intensity of magnetization (in $$A-m^{-1}$$) in a material, if the magnetic field strength of the material is 1800 $$Amp - m^{-1}$$ and the magnetic susceptibility is $$0.4 \times 10^{-5}$$.
What will be the produced mmf (in Amp-turns) in a magnetic circuit, if it has 100 number of turns and carrying a current of 0.2 A?
Determine the critical current (in A) for a wire of a material that has a diameter of 2 mm at 8 K. If the critical temperature for the material is 12 K and the magnetic field is
$$6 \times 10^4 Am^{-1}$$
What will be the flux density (in T} of a material in free space, if the field strength of the material is $$2 \times 10^5 A-m^{-1}$$ and the magnetic susceptibility of the material is $$0.44 \times 10^{-3}$$?
Determine the value of time (in sec) when an average EMF of 100 V is induced in a coil of area 200 cm$$^2$$ with 100 turns, when it is completely removed from a magnetic field of 30 T acting at right angles to the coil.
