176. The given figure shows three Nyquist plots of G(s) H(s) = e-sT/[s(s + 1)] for different values of T. The curves 1, 2, 3 can be
177. Consider the following statements:
The gain margin and phase margin of an unstable system may respectively be positive, positivepositive, negativenegative, positivenegative, negative Of these statements
178. A first order element yields almost exact duplication only for constant or slowly varying phenomenon.
179. For a stable system
180. If the angle of departure of root locus at s = - 1 + j is
181. The system in the given figure
182. The units of thermal capacitance are
183. Assertion (A): In the given figure open loop transfer function =
Reason (R): The ratio is called feed forward transfer function.
184. Nichols chart consists of M and N locii in log magnitude versus phase diagram.
185. If , initial and final values of i(t) are
186. The gain margin of first and second order systems is infinite.
187. One advantage of using polar plot is that it depicts the frequency response characteristics over the entire frequency.
188. The force required to initiate motion between two contacting surfaces is called
189. Assertion (A): Derivative control action cannot be used alone.Reason (R): Derivative control action is effective only during transient periods.
190. The slope of log magnitude curve near the cut off frequency is called cut off rate.
191. First Thirthanakara of Jainism?
192. Generally a servomotor operates at
193. If C is thermal capacitance, m is mass of liquid and c is specific heat, then
194. Assertion (A): The concept of impulse function is useful in differentiating discontinuous functions.Reason (R):
195. In a two phase servomotor, if R is rotor resistance, X is rotor reactance, L is rotor length D is rotor diameter then
196. The ac motor used in servo applications is
197. The remains of the earliest hominids in Asia were found in?
198. A first-order system has a time constant t. For unit ramp input, the steady state error is
199. The system in the given figure is
200. For the equation where Q is heat energy, Ct is thermal capacitance and θ is temperature, the analogous electrical equation is