53.

56.

57.

58.

59;

60.

61.

The stale varable description of a linear autonomous system is X=AX where X is the two

2
dimensional state vector and A is the system matrix given by A = | 0 The roots of the

2

characteristic equation are ;

(ಗಿ) -2and -2 (இ —Zand 42 (© ~j2and +)2 (D) +2and 42

Signal flow graph is used to obtain :
{A} Controllability of the system (8) Stability of the system
(ര Transfer function of the system (10) Poles of the system

The damping ratio of a system having the characteristic equation s 4 2s+8§=0 is :
(5) 0.300 18) 0330 (ര 0.353 (D) 0.250

An ammeter having internal resistance of 0.2(), has a current range of 0-5 A. In order to
change the range to (1-25 A, we need to add a resistance of :

{^} 0.05 (1 in parallel with the meter
(B) 0.8 in series with the meter
(८) 1.0 01 in series with the meter
(2) 0.04 () in parallel with the meter

In a dynamomeler type wattmeter the pressure coil is :
(A) Highly resistive (B) THighly inductive
(C) Purely resistive (D) ‏راع‎ inductive

The Q-meter works on the principle of :
(A) 801105 1080707300 (8) mulual inductance
(5) ടല! സലമ (D) parallel resonance

When a load of 450 W is connected, if an energy meter disc makes 10 revolutions in
100 seconds the meter constant (in rev/kWh) is :

(A) 1000 (8) 800 (८) 500 (>) 1600

In de potentiometer measurements, a second reading is often taken after reversing the polarities
of de supply. This is to eliminate the effects of :

(೩) Ripples 15 4 ऽपर (B} மன magnetic fields
{C) Stray thermal emf's (13) Erroneous standardisation

A low-pass filter with a cut-off frequency of 61) Hz is cascaded with a high pass filter with a
cut-off frequency of 40 Hz. The resultant system of filters will function as :

(ಡಿ) an all-pass filter (B) anall - stop filter

{८} a band stop {band-reject) filter (10) a band - pass filter

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