# Electronics and Communication Engineering - Automatic Control Systems

### Exercise :: Automatic Control Systems - Section 5

1.

A phase lead network with where a < 1, gives maximum phase lead at a frequency equal to

 A. B. C. D. Explanation:

No answer description available for this question. Let us discuss.

2.

Generally a servomotor operates at

 A. high torque and high speed B. low torque and low speed C. low torque and high speed D. high torque and low speed

Explanation:

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3.

If C is thermal capacitance, m is mass of liquid and c is specific heat, then

 A. C = mc B. c = mC C. m = cC D. C = (mc)2

Explanation:

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4.

Assertion (A): The concept of impulse function is useful in differentiating discontinuous functions.

Reason (R): A. Both A and R are correct and R is correct explanation of A B. Both A and R are correct but R is not correct explanation of A C. A is correct but R is wrong D. R is correct but A is wrong

Explanation:

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5.

In a two phase servomotor, if R is rotor resistance, X is rotor reactance, L is rotor length D is rotor diameter then

 A. and are both small B. is large but is small C. is small but is large D. and are both large