49. What is the typical drop out voltage across 7805 fixed positive voltage regulator?
A 2V ೫) 15%
യ 100mV (1) 4mV
50. A cell of an UPS battery has an Ah efficiency மீ 80%. It has an average terminal voltage on
discharge and charge of 1.2 V and 1.6 V respectively. The Watl-hour efficiency of the ‏ا لاد‎
_ %
(ക 50% (18) 60%
(2) 80% യു 100%
हा. Find the Thevenin's voltage across the points A and B in the following circuit :
A
50
‏جک‎ ©
5V
ಯ) 5V B © 77
© 7 D) 125V
55. Which of the following currents can induce the maximum induced voltage in a coil?
(ಗಿ) 1 4, 70 (B) 1A, 100Hz
(C) 1A, 1Hz ) 20A,DC
53. A bandpass filter has a bandwidth of 4 kHz with a central frequency of 50 kHz. If the gain at
48 kHz is 10 dB, what is the maximum gain?
(4) 13dB ற 7.32dB
(C) 13.6612dB (D) 1068
54. 11 8 3 phase power measurement using two wattmeter method, both wattmeters give the
same reading. What is the power factor of the circuit?
(ಯ) 05188 (B) Unity
(€) 0.5lead (D) Zero
55. A spherical capacitor has an inner conducting sphere of 0.1 m and outer conducting sphere of
radius 0.2 m. The space in between is filled with a dielectric of permeability ‏.ع‎ What is its
capacitance? ⋅
வ மச (8) 87६0
(0 0.87 € (D) 7>
56. Divergence of curl of any vector is :
' @A 0 (B) same vector
(0 null veetor (D) unity vector
57. Two inductances of 1 H each are coupled together. The maximum value of mutual inductance
between them is :
(ல 2H ®) 05H
ര 025H ∙ യ 118
167/2016 8 A