88,

89.

60.

61.

62.

68.

64.

65.

The inductance of a long solenoid is measured as 1 mH. What will be its inductance, if the
number of turns is doubled?

(4) 1mH 0) 4mH

(0 05mH D) 2mH

The energy stored in the magnetic field of a salenoid carrying a current of 10 A is 0.5 J, What
will be the stored energy if the number of turns is doubled and the current is halved?

A 14 8 89

(¢) 084 തു 0.26

A capacitance is formed using 3 different dielectrics, as shown in the figure. If the

capacitance due to dielectric A alone is 24F, what is the total capacitance?
‏سر‎

B =2 e

ജട ‏و‎
‎(ಯ) ‏رص 7ر3‎ 8uF
(0 2⁄2 D) 4/7

The minimum regulation of a transformer occurs at a power factor of 0.707. The power factor
at maximum regulation will be :

(४) 0.806 (ए) 0707

)0 ಟಟ] (0) 0.8

The core loss of a transformer under OC test was measured as 40 W using an LPF
wattmeter. If the same power is measured using an HPF wattmeter, what will it read :

வ > 40 ण (೫) < 40 भ
(0 40४ (D) Cannot predict

A 220 V DC machine which runs at rated speed as a generator supplies 10 A current. If the
same machine is allowed to run as a motor and if it takes 10 A current, at what percentage of
rated speed will it run?

(^) 89% (B) 100%
(0 102% (D) 112%
In a Brush Less DC (BLDC) motor, the construction of motor is similar to :
(ക Stepper (18) Universal motor
(C) DC motor ४ (D) Synchronous motor
The load angle of a'perfectly compensated DC motor is :
(4) 9० ⋅ (8) 908
(0 1805 (D) Between 0° and 90°
9 ' 167/2016

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