01․ Which of the following Y-parameters is dimensionless?
All the Y parameters are the ratio of current to voltage and therefore have unit mho.
02․ For finding the Z11 parameter at the input port of a two port network
Z11 = V1/I1 when I2 = 0. To make I2 = 0, the output port is to be open circuited.
03․ Unit step function is first derivative of
Ramp function is f(t) = t and unit step function is f(t) = 1. So the first derivative of ramp is a unit step.
04․ Which of the following is the correct relation?
AD-BC is the condition for reciprocity in case of ABCD parameters.
05․ Laplace transform analysis gives
Laplace transform transforms a function of time to a function of frequency.
06․ If a function is shifted by 'T', then it is correctly represented as
If a function is displaced by time T, then it is given as the product of the time displaced function and a unit step function displaced by same time T.
07․ The value of unity impulse function at time (t) = 0 is
Since the function is unit impulse, it will be 1 at time t = 0 and will be equal to 0 for any other time.
08․ The Laplace Transform of a shifted unit step f (t) = U (t-a) is
The laplace transform of a function displaced by time T is given by e-sT .F(s). F(s) is the laplace transform of the original signal.
09․ Which of the following theorems can be applied to any network- linear or nonlinear, active or passive, time variant or time invariant?
Tellegen theorem is applicable to a very general class of lumped networks composed of elements that are - linear or nonlinear, active or passive, time variant or time invariant.
10․ Millman theorem yields equivalent
Millman theorem gives the equivalent value of voltage or current for a network consisting of any number of current sources.