Electrical Engineering - Online Test
Q1. A temperature in the range of −40˚ C to 55˚ C is to be measured with a resolution of 0.1˚ C. The
minimum number of ADC bits required to get a matching dynamic range of the temperature sensor
Answer : Option B
Explaination / Solution:
Q2. In cylindrical coordinate system, the potential produced by a uniform ring charge is given by φ = f(r, z), where f is a continuous function of r and z. Let 
be the resulting electric field. Then the magnitude of ∇ ×
be the resulting electric field. Then the magnitude of ∇ ×
Answer : Option B
Explaination / Solution:
Q3. The figure shows the high-frequency capacitance - voltage characteristics of Metal/Sio2/silicon (MOS) capacitor having an area of 1 × 10-4 cm2. Assume that the permittivities (ε0εr) of silicon and Sio are 1 × 10-12 F/cm and 3.5 × 10-13 F/ cm respectively.
The maximum depletion layer width in silicon is
Answer : Option B
Explaination / Solution:
Q4. The input voltage given to a converter is
The current drawn by the converter is
The active power drawn by the converter is
Answer : Option B
Explaination / Solution:
Q5. 
A solar energy installation utilize a three – phase bridge converter to feed energy into power system through a transformer of 400V/400 V, as shown below.
The energy is collected in a bank of 400 V battery and is connected to converter through a large filter choke of resistance 10Ω.
The kVA rating of the input transformer is
Answer : Option C
Explaination / Solution:
Q6. Given that f(y) = | y | / y, and q is any non-zero real number, the value of | f(q) - f(-q) | is
Answer : Option D
Explaination / Solution:
Q7. The slip of an induction motor normally does not depend on
Answer : Option D
Explaination / Solution:
Q8. Given 
. If C is a counterclockwise path in the z-plane such that |z + 1| = 1, the value
of 
is
. If C is a counterclockwise path in the z-plane such that |z + 1| = 1, the value
of is
Answer : Option C
Explaination / Solution:
Q9. The i-v characteristics of the diode in the circuit given below are
The current in the circuit is
Answer : Option D
Explaination / Solution:
Q10. With initial condition
x(1) = 0.5, the solution of the differential equation 
is
is
Answer : Option D
Explaination / Solution:
