Exercise: Exam Question Papers

Questions for: Exam Question Papers

At t = ∞; VR2 and VC will be
A:
4, 4
B:
2, 4
C:
0, 2
D:
2, 0
Answer: B

When steady state is reached again; then C is open

Now VR2 = 2V

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A sphere with charge Q was placed in, but not touching a larger hollow sphere. If there is any charge initially on the outer sphere; to remove it the outer sphere was earthed momentarily, and then the inner sphere was removed. The charge remaining on the outer sphere was then measured. This charge was found to be __________ to the charge on the inner sphere.
A:
equal and of same again
B:
equal and of opposite sign
C:
unequal and of same sign
D:
unequal and of opposite sign
Answer: B

This is true for all sizes of the spheres and for all types of dielectric media between the spheres.

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Which of the following options is the closest in meaning to the world below:
Circuitous
A:
cyclic
B:
indirect
C:
confusing
D:
crooked
Answer: B

Circuitous means round about or not direct. Therefore the closest in meaning will be indirect.

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Using 4-bit numbers (n = 4) if k = (0011)2 how is k expressed in 2's complement.
A:
(1011)2
B:
(1101)2
C:
(1100)2
D:
(0101)2
Answer: B

In 2's complement

Simply find 2s complement

⇒ (0011)2 ⇒ 1100 + 1 ⇒ (1101)2 .

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The circuit shown in the figure converts
A:
BCD to Binary code
B:
Binary to excess - 3 code
C:
Excess - 3 to Gray
D:
Gray to Binary
Answer: D

Let input is 1 1 0 1

y1 = x1

y2 = x2 ⊕ x1 ⇒ 1 ⊕ 1 = 0

y3 = x3 ⊕ x2 = 0 ⊕ 0 = 0

y4 = x4 ⊕ x3 = 1 ⊕ 0 = 1

if input is gray then y1 y2 y3 y4 will be Binary.

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