Mathematics - Online Test
Q1. Consider a two-port network with the transmission matrix: 
If the network is
reciprocal, then
If the network is
reciprocal, then
Answer : Option D
Explaination / Solution:
No Explaination.
Q2. The Laplace transform of the causal periodic square wave of period T shown in the figure
below is 
Answer : Option B
Explaination / Solution:
Q3. Let U and V be two independent zero mean Gaussain random variables of variances 1/4 and 1/9 respectively. The probability 
is
is
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. Let A be an m × n matrix and B an n × m matrix. It is given that determinant (Im + AB) = determinant (In + BA), where Ik is the k × k identity
matrix. Using the above property, the determinant of the matrix given below is
Answer : Option B
Explaination / Solution:
Consider the given matrix be
From the given property
Q5. A system described by the differential equation 
Let
x(t) be a rectangular pulse given by
Let
x(t) be a rectangular pulse given byAssuming that y(0) = 0 and dy/dt = 0 at t = 0, the Laplace transform of y(t) is
Answer : Option B
Explaination / Solution:
No Explaination.
Q6. A system described by a linear, constant coefficient, ordinary, first order
differential equation has an exact solution given by y(t) for t > 0, when the
forcing function is x(t) and the initial condition is y(0). If one wishes to modify
the system so that the solution becomes -2y(t) for t > 0, we need to
Answer : Option D
Explaination / Solution:
No Explaination.
Q7. Consider two identically distributed zero-mean random variables U and V. Let the cumulative distribution functions of U and 2V be F(x) and G(x) respectively. Then, for all values of x
Answer : Option C
Explaination / Solution:
No Explaination.
Q8. Which one of the following is NOT necessarily a property of a Group?
Answer : Option A
Explaination / Solution:
No Explaination.
Q9. Consider the binary relation R = {(x, y), (x, z), (z, x), (z, y)} on the set {x, y, z}. Which one the following is TRUE?
Answer : Option D
Explaination / Solution:
No Explaination.
Q10. (1217)8 is equivalent to
Answer : Option B
Explaination / Solution:
No Explaination.
