Questions and answers for exam Preparation

MCQs

Total Questions : 2104 | Page 210 of 211 pages

Question 2091. In a two terminals network the O.C. voltage measured at the given terminals is 100 V and s.c., currents at the same terminals 5 A. If a load of 80 Ω resistance is connected at the terminals, load current is

1 A
1.25 A
6 A
6.25 A

Discuss Question

Answer: Option A. -> 1 A
Answer: (a).1 A

Question 2092. Poles and zeros of a driving point function of a network are simple and alternate on jω axis. The network consists of

R and C
L and C
R and L
R, L and C

Discuss Question

Answer: Option B. -> L and C
Answer: (b).L and C

Question 2093. Colour code of carbon resistors has only two bands.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option B. -> False
Answer: (b).False

Question 2094. If A = 3 + j1, A⁴ =

3.16 ∠18.4°
100 ∠73.72°
100 ∠18.4°
3.16 ∠73.22°

Discuss Question

Answer: Option B. -> 100 ∠73.72°
Answer: (b).100 ∠73.72°

Question 2095. A circuit is replaced by its Thevenin's equivalent to find current through a certain branch. If VTH = 10 V and RTH = 20 Ω, the current through the branch

will always be 0.5 A
will always be less than 0.5 A
will always be equal to or less than 0.5 A
may be 0.5 A or more or less

Discuss Question

Answer: Option C. -> will always be equal to or less than 0.5 A
Answer: (c).will always be equal to or less than 0.5 A

Question 2096. An air cored coil has an inductance of 0.3 H. If another coil has an iron core of μᵣ = 500, the remaining quantities being the same, the inductance of the second coil will be

0.3 H
0.3 x 500 H
0.3 H/500
none of the above

Discuss Question

Answer: Option D. -> none of the above
Answer: (d).none of the above

Question 2097. Evaluate the value of 2 [u (t - 1) - u (1 - 2t)] (u ( t + 1) + u (t)) at t = 3 sec.

Discuss Question

Answer: Option B. -> 4
Answer: (b).4

Question 2098. Assertion (A): In an R-L circuit having high inductance, the rise of current is very slow.
Reason (R): The time constant of R-L circuit is L/R.