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1.

Assertion (A): The velocity of electromagnetic waves is same as velocity of light.
Reason (R): Electrons also travel with the same velocity as photons.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true

asked in Electrical Paper-1, 2007

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2.

Assertion (A): Adding a pole to the open-loop transfer function G(s)H(s) has the effect of pushing the root loci towards the RH s-plane.
Reason (R): If the number of poles increases the angle of asymptotes for the complex roots is reduced.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true

asked in Electrical Paper-1, 2007

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3.

Microsyn is based on the principle of
(A) DC motor
(B) resolver
(C) Saturable reactor
(D) Rotating differential transformer

asked in Electrical Paper-1, 2007

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4.

Which one of the following statements relating to phase plane techniques is not correct?
(a) They are general and applicable to system of any order
(b) Steady-state accuracy and existence of limit cycle can be predicted
(c) Amplitude and frequency of limit cycle, if exists, can be predicted
(d) It is applicable even to discontinuous time systems

asked in Electrical Paper-1, 2007

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5.

Match List I with List II and select the correct answer using the codes given below the lists.

List I (Evaluation of the value of function)
A. Final value
B. Initial value
List II (Corresponding z-transform expression)
1. Lim_z→0 (1-z^-1)F(z)
2. Lim_z→1 (1-z^-1)F(z)
3. Lim_z→∞ F(z)
4. Lim_z→∞ zF(z)

a. A→1, B→3
b. A→1, B→4
c. A→2, B→3
d. A→2, B→4

asked in Electrical Paper-1, 2007

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6.

For a stepper motor, what is the correct relationship between the maximum slue rate (MSR) and the load?
(a) MSR decreases as load is reduced
(b) MSR increases considerably as load is increased
(c) MSR increases as load is reduced
(d) MSR remains the same even if the load is changed

asked in Electrical Paper-1, 2007

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