5 of 13

B:-Hertz
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मा

Correct Answer: Option:

‘Question33:-Whenever there is a temperature gradient in a conductive material, an e.m.f will induce and the gradient of voltage is proportional to the gradient in temperature. This is
known as

AcStroboscopic effect
B: Seebeck effect
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D-Esaki effect
Correct Answer:- Option ®
Question34:-The working of OFC is based on the principle
‘AcTotal internal reflection
B:Total internal defraction
C=Total internal refraction
D-Total radiation
Correct Answer:- Option-é
Question35::Which value of BCD input activates all segments of the seven segment decoder IC 7447
۸02
81111
‏00ب‎
‎00
‎Correct Answer:- Option-C
Question36:-The wavelength of 2-GHz wave is:
cls em
B15 mm
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‏مہ کدھ‎
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‎Question37:-The cross talk due to the electromagnetic interferance can be eliminated by
‘A:Placing a high value inductor in series with the transmission line
B:-Using capacitance network in parallel with the transmission line
11 wires
D-A stub of appropriate length is placed at some distance from the load
Correct Answer:- Option-C
Question38:-The insulation thickness in conductor of a cable depend on
‘Aspower handling ability of cable
B:-Applied voltage
C:Current carrying capability of cable
D:-The length of the cable
Correct Answer:- Option ®
Question39:-n multi digit seven segment displays, the Ripple Blank Input and Ripple Blank Outputs are used for
‘A:Dynamic display in order to save power and to increase the life of the display
B:-Blank out the all the zeros and make it look more intelligent
CCascading the display otherwise displays not works synchronously
D-Blank out the leading zeros and make it look more intelligent
Correct Answer:- Option-D
Question40:-A 1KVA, 12V online ups connected to a load of 500 Watts, the battery used is 100Ah, then what will be the back up time if the losses are negligible
‘8-120 minutes

B:-2 hour and 40 minutes