Q3.Group I lists four types of p − n junction diodes. Match each device in Group I with one of the option in Group II to indicate the bias condition of the device in its normal mode of operation.
Group - I Group-II
(P) Zener Diode (1) Forward bias
(Q) Solar cell (2) Reverse bias
(R) LASER diode
(S) Avalanche Photodiode
Answer : Option BExplaination / Solution:
Zener diode and Avalanche diode works in the reverse bias and laser diode works in forward bias.
In solar cell diode works in forward bias but photo current is in reverse direction. Thus
Zener diode : Reverse Bias
Solar Cell : Forward Bias
Laser Diode : Forward Bias
Avalanche Photo diode : Reverse Bias
The steady state error of a unity feedback linear system for a unit step input is 0.1. The steady state error of the same system, for a pulse input r(t) having a magnitude of 10 and a duration of one second, as shown in the figure is
Q8.A portion of the main program to call a subroutine SUB in an 8085 environment is given below.
:
:
LXI D,DISP
LP : CALL SUB
:
It is desired that control be returned to LP+DISP+3 when the RET instruction is executed in the subroutine. The set of instructions that precede the RET instruction in the subroutine are
Answer : Option CExplaination / Solution: No Explaination.
Q10.A digit DMM has the error specification as : 0.2% of reading + 10 counts. If a dc voltage of 100V is read on its 200V full scale, the maximum error that can be expected in the reading is
Answer : Option CExplaination / Solution: No Explaination.
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0