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Assertion
(A): If , the final value of i(t) = 10Reason (R): If , the initial value i(t) = 2
A is true, R is false
Both A and R are correct but R is not correct explanation of A
A is false, R is true
Both A and R are correct and R is correct explanation of A
If , the coefficient of term e-t in f(t) will be
1
2/3
0.5
Assertion
(A): Transient analysis uses Laplacetransformation.
Reason (R): Laplace transform method is suitable for solution of integro differential equations
A is true, R is false
A is false, R is true
Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
If f(t) ↔ F(jω), f(- t) ↔
0.5 F(jω)
F(- jω)
- F(jω)
F(jω)
Which one is a causal system
y(n) = 3x[n + 1] 2x[n - 1] + x[n]
y(n) = 3x[n] - 2x[n - 1]
y(n) = 3x[n] + 2x[n + 1]
y(n) = 3x[n + 1] + 2x[n - 1]
Which one most appropriate dynamic system
y(n) = x(n)
y(n) + y(n - 1) + y(n + 1)
y(n) + y(n - 1)
The trignometric Fourier series of an even function of time does not have
cosine term
odd harmonic terms
sine term
dc term
The integral of k δ(t) is
a step function of magnitude k
a ramp of slope 1/k
a step function 'of magnitude 1/k
a ramp of slope k
If a sequence is causal then ROC is (where a is any number)
|z| > a
|z| < a
|z| = a
entire plane
Pick out the odd one
stochastic function
random variable
random experiment
stochastic variable
If autocorrelation sequence is Rc(n) = then what will be energy of sequence
24
288
3
2
A system with input x[n] and output y[n] is given as y[n] = (sin 5/6 pn) x(n) The system is
linear, stable and invertible
linear stable, non invertible
non-linear, stable and non-invertible
linear, unstable, invertible
If F(jω) is the Fourier transform of f(t), then
£ f(- t) = F(- jω)
£ f(- t) = F* (- jω)
£ f(- t) = F(jω)
£ f(- t) = F* (jω)
F.T. of continuous non-periodic signal is
periodic
A and B
aperiodic
None
Energy spectral density is equal to for a signal g(t)
|g(t)|2
|G(f)|2
|G(f)|2/Bandwidth
Energy density function is always
Even
Odd
Both (a) and (b)
neither even nor odd
A voltage V(t) which is a Gaussian ergodic random process with a mean of zero and a variance of 4 volt2 is measured by a true rmsmeter.
The reading will be
4
2
16
Algebraic expression for z-transform of x[n] is X[z]... What is the algebraic expression of z-transform of ejω0n x[n]
X(ejω0z)
X(Z - Z0)
X(Z)jω0z
X(e-jW0z)
If average correlation between v1(t) and v2(t) is R12(t) and average correlation between v2(t) and v1(t) is R21(t) then
NONE OF THESE
R12(t) = - R21(t)
R21(t) = R12(t)
R12(t) = R21(t)
Double integration of a unit step function would lead to
A parabola
an impulse
a ramp
a doublet
1
2
10
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