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During frequency measurement Ligsajous pattern on oscilloseope has 2 horizontal tangencies
and & vertical tangencies when the frequency of the horizontal input is 1 kHz. Then the
vertical frequency will be :

(^) 5.0 kHz ന 2.5kHz

(ര 4.0kHz D) 400 Hz

V,-0.5Y,, I, =-V,+

A two port network is defined by the following equations, 7
parameters are given by Z =:
(४) 1 -0.5; -1 1] ற & 128
(0 -2 -1 1] (ॐ 0. & £ 1

A capacitor of 10 27 is connected to a 100 V dc source through a series resistance of 10 kQ
It will be fully charged in

(५) 0.018 (8) 0.18

(0) 01585 Dy 0.58

A step up chopper supplying a load at 500V and input is 200V. The off time of switch 18
20w sec, inductor current 18 continuous and ripple free. The frequency of chopper in kHz is :
(ഇ 20kHz (B) 25kHz
() 50%kHz (D) 100 kHz

The two windings of a 200/100 V transformers are connected in series and results in net
inductances of 70 mH and 30 mH in different connections Assuming L, =4L,, the coupling

coefficient 18 :

(५) 1 0) 05
(2) 5 (7) 0.428
Among the following materials cable glands are made from:
0) plastic (11) Brass
{iii) Aluminium (iv) Stainless steel
(A) All the above ம மக
(८) (ऋ (४) & (ण) (2). 00 007

A voltage source with source impedance Zs =0.3+ j0.AQis connected to a resistive load.
Then the load resistance for maximum power transfer is :

ക 030 0 ‏ده‎
‎© 078 3) 9.5 2
The maximum allowable earth resistance for major substations is :
ல 18 (2) 5
© ॐ ‏٥0‎ ಇ 0ಣ
7 85/2015

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