Q4.A plane wave of wavelength λ is traveling in a direction making an angle 300 with positive x − axis and 900 with positive y − axis. The field of the plane
wave can be represented as (E is constant)
Q5.A p n junction has a built-in potential of 0.8 V. The depletion layer width a
reverse bias of 1.2 V is 2 μm. For a reverse bias of 7.2 V, the depletion layer
width will be
An open loop system represented by the transfer function is
Answer : Option BExplaination / Solution:
Open loop system stability is depends only on pole locations ⇒ system is stable
There is one zero on right half of s-plane so system is non – minimum phase
Q9.A three-phase, salient pole synchronous motor is connected to an infinite bus. Ig is operated at no load a normal excitation. The field excitation of the motor is first reduced to zero and then increased in reverse direction gradually. Then the
armature current
Answer : Option BExplaination / Solution: No Explaination.
Q10.Consider the following statement
(i) The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the current coil.
(ii) The compensating coil of a low power factor wattmeter compensates the effect 0of the impedance of the voltage coil circuit.
Answer : Option BExplaination / Solution: No Explaination.
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0