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- Question 1 of 15
##### 1. Question

With initial condition x(1) = 0.5 , the solution of the differential equation t(dx/dt) + x = t is

CorrectIncorrect - Question 2 of 15
##### 2. Question

Given a system of equations:

x+2y+2z = b1

5x+y+3z = b2

Which of the following is true regarding its solutionsCorrectIncorrect - Question 3 of 15
##### 3. Question

An incandescent lamp is marked 40 W, 240V. If resistance at room temperature (26°C) is 120 Ω, and temperature coefficient of resistance is .0045/°C, then its ‘ON’ state filament temperature in °C is approximately

CorrectIncorrect - Question 4 of 15
##### 4. Question

Consider a system consisting of a synchronous generator working at a lagging power factor, a synchronous motor working at an overexcited condition and a directly grid-connected induction generator. Consider capacitive VAr to be a source and inductive VAr to be a sink of reactive power. Which one of the following statements is TRUE?

CorrectIncorrect - Question 5 of 15
##### 5. Question

A dc voltage with ripple is given by v(t) = [100 + 10 sin(wt) − 5 sin (3wt)] volts. Measurements of this voltage v(t), made by moving-coil and moving-iron voltmeters, show readings of V1 and V2 respectively. The value of V2 − V1, in volts, is

CorrectIncorrect - Question 6 of 15
##### 6. Question

A signal of 10 V is applied to a 50

CorrectIncorrect - Question 7 of 15
##### 7. Question

The electric field in the vicinity of two oppositely charged parallel conductors is

CorrectIncorrect - Question 8 of 15
##### 8. Question

For a series and a parallel circuit,the equivalent total value of certain parameter X is given by

Xe = X1 + X2+X3 +X4 +___+X1

where X; is the ith value of the parameter and Xe is the equivalent value, and n is the number of elements. The parameter X can be

CorrectIncorrect - Question 9 of 15
##### 9. Question

A coil having 250 turns is connected to a 50 V DC source.If the coil resistance is 10Ω, the m.m.f. (magneto-motive force) developed in AT would be

CorrectIncorrect - Question 10 of 15
##### 10. Question

The following is not essential for the working of an indicating instrument

CorrectIncorrect - Question 11 of 15
##### 11. Question

Systematic error of an instrument for measurement can be minimized by

CorrectIncorrect - Question 12 of 15
##### 12. Question

Guard circuits are used in insulation resistance measurements to

CorrectIncorrect - Question 13 of 15
##### 13. Question

The following transfer function represents a phase-lead compensator

CorrectIncorrect - Question 14 of 15
##### 14. Question

Consider the following statements :The open-circuit test in a transformer can be used to obtain

1.Core losses.

2.Magnitude of exciting current.

3.Copper losses.

4.Equivalent series impedance.Correct. statements are

(a)1,2, 3 and 4

(b)1 and 3 only

(c)1 and 2 only

(d)2 and 4 onlyCorrectIncorrect - Question 15 of 15
##### 15. Question

The rotor frequency of a 3-phase,5kW,400V,50Hz,4-pole slip ring induction motor is 25Hz.The speed of the motor when connected to a 400 volt,50 Hz supply will be

CorrectIncorrect

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