TANCET 2005(Questions from Question Paper for Year 2005)

 Q1 to Q10   


 Q11 to Q20







21. The laplace transform of damped sine wave e^-at sin(wt) is

A) 1 / ((s+a)²+w²)

B) s / ((s+a)²+w²)

C) w / ((s+a)²+w²)

D) w² / ((s+a)²+w²)



22. A feedback control system has an open loop transfer function given by H G(jw) = 40 / {jw [1+(jw / 5)]}. The phase margin is

A) 21.8^o

B) 43.6^o

C) 44^o

D) None of the above



23. A series LCR circuit consisting of R=10Ω, X_L=20Ω and X_C=20Ω is connected across an AC supply of 200V rms. The rms voltage across capacitor is

A) 200 _-90 V

B) 200 _ 90 V

C) 400 _ 90 V

D) 400 _-90 V



24. A ramp volatege, v(t) = 100V, is applied to an RC differentiating circuit with R=5kΩ and C=4µF. The maximum output voltage is

A) 0.2 V

B) 2.0 V

C) 10.0 V

D) 50.0 V



25. Two 6V, 2Ω battries are connected in series aiding. This combination can be replaced by a single equivalent current generater and a parellel resistance of

A) 3A, 4Ω

B) 3A, 2Ω

C) 3A, 1Ω

D) 6A, 2Ω



26. In an RLC circuit, v(t) = 20sin(314t + 5π/6) and i(t) = 10sin(314t + 2π/3). The PF of the circuit is

A) 0.5 lead

B) 0.866 lag

C) 0.866 lead

D) 0.5 lag



27. The short circuit admittance matrix of a 2-port network is [0 -½ ; ½ 0]. The 2-port network is

A) Non-reciprocal and Passive

B) Non-reciprocal and Active

C) Reciprocal and Passive

D) Reciprocal and Active



28. The inverse transform of 1/s is

A) δ(t)

B) u(t)

C) u(t-a)

D) t



29. In a sychronous motor, the magnitude of stator back emf. Ev depends on

A) Speed of the motor

B) load on the motor

C) both speed and rotor flux

D) DC excitation only



30. The output y(t) of the system when input x(t) = δ(t) and all initial conditions are zero is defined by

A) unit impluse response

B) unit step response

C) unit ramp response

D) none of the above





Answer: 21-C; 22-D; 23-D; 24-B; 25-A; 26-B; 27-A; 28-D; 29-D; 30-A.