8. The power factor of a RLC series circuit connected across 230 ५, 50 Hz supply is 0.8. If
the capacitor is removed from the circuit, then the power factor becomes 0.625. What
will be the power factor if inductor is also removed from the circuit ?

(A) 0.8 (B) 0.625
(C) 045 (D) None of these

9. A 1 ‏طبر‎ capacitor is charged to 400 ५. Find the value of voltage to which the capacitor is
discharged if 0.06 J energy is removed from the capacitor.

(A) 0 (B) 200
(C) 50 (D) None of these

10. The quality factor of a RC series circuit is to power factor.
(A) directly proportional (8) inversely proportional
(C) equal (D) None of these

11. The magnetic susceptibility of a paramagnetic material is
(A) 1688 than one but positive ‏رق‎ less than one but negative
(C) more than one (D) None of these

12. The self-inductance of coil A is Ly and that of coil 8 is Ly. By keeping mutual

inductance between the coils same, if the self-inductance of coil B is increased 4 times,
what will be the change in coupling co-efficient, K ?
(A) Reduced by half (B) Increased 2 times

(C) 1001085004 times (D) Reduced by one-fourth

13. The two inductance coils A and B in series with the axis of one coil perpendicular to the
axis of the other, then the mutual inductance is

(൧) one (B) 2.5
(C) zero (D) 5
14. Energy stored in an inductive coil is to square of current.
(A) _ inversely proportional (B) equal
(C) directly proportional (D) None of these

15. ^ coil has a time constant of 2 second and an inductance of 4 11. If the coil is connected
to 40 V source, what will be the rate of rise of current in A/sec at the instant of switching ?

(A) 10 (B) 20
(൭ 2.5 (D) 2
16. The ratio of magnetization to magnetizing force is called
(^) Relative permeability (B) Magnetic flux density
(C) Magnetic field intensity (D) Magnetic susceptibility
17. The potential inside a charged hollow sphere is
(^) Zero (B) ۲٥٥٢ than that on the surface
(€) Same as that on the surface ൧) 14 of the above _

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