Electrical Engineering - Online Test
Q1. The transfer function of a system is 
The steady state output y(t) is A cos(2t + φ) for
the input cos(2t). The values of A and φ, respectively are
The steady state output y(t) is A cos(2t + φ) for
the input cos(2t). The values of A and φ, respectively are
Answer : Option B
Explaination / Solution:
Q2.
Consider a straight, infinitely long, current carrying conductor lying on the z-axis. Which one of the following plots (in linear scale) qualitatively represents the dependence of Hϕ on r , where Hϕ is the magnitude of the azimuthal component of magnetic field outside the conductor and r is the radial distance from the conductor ?
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. The output of a continuous-time, linear time-invariant system is denoted by T{x(t)} where x(t) is
the input signal. A signal z(t) is called eigen-signal of the system T , when T{z(t)} = γz(t),
where γ is a complex number, in general, and is called an eigenvalue of T. Suppose the impulse
response of the system T is real and even. Which of the following statements is TRUE?
Answer : Option D
Explaination / Solution:
Q4. A power system has 100 buses including 10 generator buses. For the load flow analysis using Newton-Raphson method in polar coordinates, the size of the Jacobian is
Answer : Option A
Explaination / Solution:
Q5. The direction of rotation of a single-phase capacitor run induction motor is reversed by
Answer : Option C
Explaination / Solution:
No Explaination.
Q6. Consider a Binary Symmetric Channel (BSC) with probability of error being p. To transmit a bit, say 1, we transmit a sequence of three 1s. The receiver will interpret the received sequence to represent 1 if at least two bits are 1. The probability that the transmitted bit will be received in error is
Answer : Option D
Explaination / Solution:
No Explaination.
Q7. 
The amplifier circuit shown below uses a silicon transistor. The capacitors Cc and CE can be assumed to be short at signal frequency and effect of output resistance r0 can be ignored. If CE is disconnected from the circuit, which one of the following statements is true
Answer : Option A
Explaination / Solution:
The equivalent circuit of given amplifier circuit (when CE is connected, RE is short-circuited)
Q8. 
The TTL circuit shown in the figure is fed with the waveform X (also shown). All gates have equal propagation delay of 10ns. The output Y of the circuit is
Answer : Option A
Explaination / Solution:
No Explaination.
Q9. 
Answer : Option A
Explaination / Solution:
When diode is ON, i=1mA. When diode is OFF, i is zero after small reverse recovery time.
Q10. The voltage across the capacitor, as sown in the figure, is expressed as 
The value of A1 and A2 respectively, are
Answer : Option A
Explaination / Solution:
