IndiaBIX

Electronics and Communication Engineering - Exam Questions Papers

Exercise : Exam Questions Papers - Exam Paper 6
11.
Find the voltage across 64 Ω resistor
V
V
V
V
Answer: Option
Explanation:

Voltage across 64 Ω is = 1x=V.

12.
If f(Z) = c0 + c1z-1, then is given by
2pc1
2p (1 + c0)
2pjc1
2pj(1 + c0)
Answer: Option
Explanation:

13.
The capacitors C1, C3, C4 and C5 have a capacitance of 4 μF each and the capacitor C2 has a capacitance of 10 μF. The effective capacitance (in μF) between the points X and Y will be
4 μF
6 μF
3 μF
8 μF
Answer: Option
Explanation:

Converting into T network

14.
(9)11 x (9)13 x(9)15 = (?)16
933
2D9
339
9AB
Answer: Option
Explanation:

(9 x 9 x 9)15 = (729)15 = (2D9)16 .

15.
The equivalent T circuit of this coupled network is shown in figure. Find the values of ZA, ZB and ZC.
-j, 6j, 2j
-j, 2j, 6j
j, 2j, - 6j
j, 2j, 6j
Answer: Option
Explanation:

Use mesh analysis for the coupled network

Apply KVL at loop 1

V1 = 5jI1 + 6jI2

Apply KVL to loop 2

V2 = 8jI2 + 6jI1

Consider given T network

Apply KVL to mesh 1

V1 = (ZA + ZC)I1 + ZCI2

Apply KVL to mesh 2

V2 = (ZB + ZC)I2 + ZCI1

Compare equation (i) and (iii)

∴ ZA + ZC = 5j and ZA = 6j

∴ ZA = - j

Compare equation (ii) and (iv)

ZB + ZC = 8j

ZB + j = 8j

ZB = 2j

∴ ZA = - j ZB = 2j ZC = 6j.

Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers