Which of the following can be used as a rotating amplifier in a control system? 1. Amplidyne 2. Separately excited dc generator 3. Synchro 4. Self excited dc generator 1 and 2 3 and 4 All 1, 2 and 3 TRUE ANSWER : ? YOUR ANSWER : ?
In force current analogy, displacement x is analogous to Magnetic flux linkage Charge Electrostatic energy Voltage TRUE ANSWER : ? YOUR ANSWER : ?
Nichols chart consists of Constant magnitude loci Constant phase angle loci Magnitude and phase angle loci in log-magnitude versus phase diagram None of these TRUE ANSWER : ? YOUR ANSWER : ?
A system is highly oscillatory if Gain margin is close to 1 or phase margin is zero Gain margin is high Gain margin is high and phase margin is 180° Gain margin is close to 1 TRUE ANSWER : ? YOUR ANSWER : ?
The effect of adding poles and zeros can be determined quickly by Nichols chart Bode plot Nyquist plot Root locus TRUE ANSWER : ? YOUR ANSWER : ?
In root locus analysis the breakaway and break in points Always occur in complex conjugate pairs None of these Either lie on the real axis or occur in complex conjugate pairs lie on the real axis TRUE ANSWER : ? YOUR ANSWER : ?
The sensor generally used in incremental optical encoder is LED Photodiode LCD Either (a) or (b) TRUE ANSWER : ? YOUR ANSWER : ?
A lag compensator Speeds up the transient response of the system Improves steady state behavior of the system Improves steady state behavior and preserves the transient response of the system Improves steady state behavior and speeds up the transient response of the system TRUE ANSWER : ? YOUR ANSWER : ?
Which dc servomotor requires strongest permanent magnet? Surface wound with stationary rotor Surface wound armature Either A or B Slotted armature TRUE ANSWER : ? YOUR ANSWER : ?