# ECE - Questions and solutions set-17

Electronics and communication Engineering Questions and solutions set-17
Question:-
Option (A)
1
Option (B)
-1
Option (C) Option (D)
2
Correct Option:
A
Question Solution:
f=50 MHz
Soλ= Sol= SoZin=ZL = = 1[Zin = ZL]
Question:-
Option (A)
-231
Option (B)
-1
Option (C)
11
Option (D)
-230
Correct Option:
D
Question Solution:  =0
V=- 10 Vi
Now =0
1.15 V= V0=-20 × 11.5 Vi =- 230
Question:-
Option (A)
19 and 2.8 V
Option (B)
19 and 4.7 V
Option (C)
38 and 2.8 V
Option (D)
38 and 4.7 V
Correct Option:
A
Question Solution:
By applying KVL in B-E loop
- 6 + 0.7 + 0.53 ie=0
ie=10 mA
10-4 (ib+0.5) - 0.7-0.5 3 ie=0
soib=0.5 mA =1 + &β
so&β=19
By applying KVL in CE loop
10-0.2 ic - VCE - 0.53 ie=0
VCE=2.8 V
Question:-
Option (A)
it is a distance in which wave amplitude suffered by an attenuation of 1 neper.
Option (B)
it is a distance in which wave amplitude suffered by an attenuation of 1 dB.
Option (C)
it is a distance in which the wave amplitude decreases by 37%
Option (D)
None of the above
Correct Option:
A