Electrical Engineering - Online Test
Q1. 
Figure shows a composite switch consisting of a power transistor (BJT) in series with a diode. Assuming that the transistor switch and the diode are ideal , the I-V characteristic of the composite switch is
Answer : Option C
Explaination / Solution:
No Explaination.
Q2. In the sequential circuit shown below, if the initial value of the output Q1Q0 is 00,
what are the next four values of Q1Q0?
Answer : Option D
Explaination / Solution:
No Explaination.
Q3. The switch SW shown in the circuit is kept at position ‘1’ for a long duration.
At
t
= 0+, the switch is moved to position ‘2’. Assuming |Vo2| > |Vo1|, the voltage vc(t) across the capacitor is
Answer : Option D
Explaination / Solution:
Q4. 
The silicon sample with unit cross-sectional area shown below is in thermal equilibrium. The following information is given: T = 300 K electronic charge = 1.6 × 10-19 C, thermal voltage = 26 mV and electron mobility = 1350 cm2 / V-s
The magnitude of the electric field at x = 0.5 μm is
Answer : Option C
Explaination / Solution:
No Explaination.
Q5. Consider a function f(x) = 1 - |x| on -1 ≤ x ≤ 1. The value of x at which the function attains a maximum, and the maximum value of function are:
Answer : Option C
Explaination / Solution:
Q6. 
For the system governed by the set of equations:
the transfer function Y(s)/U(s) is given by
Answer : Option A
Explaination / Solution:
Q7. An open loop transfer function G(s) of a system is
For a unity feedback system, the breakaway point of the root loci on the real axis occurs at,
Answer : Option A
Explaination / Solution:
1+ G= (
Q8. Consider a continuous-time system with input x(t) and output y(t) given by
y(t) = x(t) cos(t)
This system is
Answer : Option C
Explaination / Solution:
Q9. A 4-pole, lap-connected, separately excited dc motor is drawing a steady current of 40 A while running at 600 rpm. A good approximation for the waveshape of the current in an armature conductor of the motor is given by
Answer : Option C
Explaination / Solution:
Q10. If the star side of the star-delta transformer shown in the figure is excited by a negative sequence voltage, then
Answer : Option D
Explaination / Solution:
