JE electrical model question and answer
Part 2
1. What is the efficiency of transformer compared with that of electrical motors of the same power?
Much higher.
2. In a common emitter amplifier, the unbypassed emitter resistance provides.
negative-voltage feedback
3. Which input yields natural response?
impulse input.
4. Which of the following options is an Active transducer?
photo voltaic cell.
5. Un-bonded strain gauges are.
exclusively used for transducer applications
6. Dynamometer type moving coil instruments are provided with.
pneumatic damping.
7. Voltmeter is a galvanometer with.
high resistance.
8. Strain gauge rosettes are used when.
the direction of principal stress is not known.
9. The dead time of an instrument refers to.
the time before the instrument begins to response after the quantity has altered.
10. One input terminal of high gain comparator circuit is grounded and a sinusoidal voltage is applied to the other input. The output of comparator will be.
a square wave.
11. A minimum-phase system with no zeros has a phase-angle of – 270° at gain crossover frequency. The system is.
Unstable.
12. In a closed-loop system in which the output is the speed of a motor, the output rate control can be used to.
limit the acceleration of the motor.
13. A freshly painted layer may be dried electronically by.
dielectric heating.
14. What is the maximum length of the flexible conduit in motor installation.
Less than 1.25 m.
15. Which among these fuses is very fast in operation?
Semiconductor fuses.
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