Q. The Fourier series representation of a periodic current (2 + 6√2 cos ωt +√48 sin 2ωt) A. The effective value is

View solution

Q. If X(z) = z+z¯³ / z+z¯¹, then x(n) series has

View solution

Q. If f=0

View solution

Q. An ac circuit has an impedance of (2 - j 9) Ω for third harmonic. The impedance for fundamental is

View solution

Q. The ROC of sequence x[n] = (0.8)ⁿ ∪[n] + (0.4)ⁿ ∪[n]

View solution

Q. Pick the odd one

View solution

Q. Assertion (A): L[af1(t) + bf2(t)] = aF1(s) - bF2(s)

Reason (R): Initial value theroem enables us to find the value of f(t) at t = 0 directly from F(s)

View solution

Q. The Laplace transform of impulse δ(t) is

View solution

Q. The impulse response of discrete time system is x[n] = (4)ⁿ ∪ [3 - n], the system is

View solution

Q. If F(s) is the Laplace transform of f(t) then Laplace transform of df(t)/dt =

View solution

Q. Assertion (A): L[e^(-at) f(t)] = F(s + a)

Reason (R): In use of Laplace transform method, initial conditions may be neglected.

View solution

Q. An ac sinusoidal wave has an rms value of 10 V. The peak to peak value is

View solution

Q. A complex wave is 5 + 5 sin ωt. Its rms value is

View solution

Q. The energy of constant amplitude complex valued exponential sequence is ...

View solution

Q. The Laplace transform of a vlotage across a capacitor is Vc (s) = 1 / s²+1 . If capacitor is 0.5 F, The current through capacitor at t = 0⁺ is

View solution

Q. Assertion (A): Intergal of a unit step function is a ramp of slope unity.

Reason (R): If f(t) = sin wt, F(s) = 1/(s² + w²)

View solution

Q. If L[f(t)] = 2(s+1)/ s²+2s+5 , then, f(0⁺) and f(∞) are given by

View solution

Q. The signal define by the equations u(t - a) = 0 for t < a and u(t - a) = 1 for t ≥ a is

View solution

Q. A voltage wave v = 10 + 20 sin ωt + 7.5 sin 3 ω(t) is applied to a series combination of two elements. The current is i = 5 sin (ωt + 20°) + 1.5 sin (3ωt + 10°). The elements are

View solution

Q. If F(t) = δ(t - a), F(s)=

View solution