The parameters of the circuit shown in the figure are Ri = 1 M, R0 = 10 ?, A = 106 V/V. If Vi = 1 µV, then output voltage, input impedance and output impedance respectively are

1.  1V, ∞, 10

2.  1V, 0, 10?

3.  1V, 0, ∞

4.  10V, ∞, 10?

View Answer  
4
Correct Answer :

1V, ∞, 10


Explanation :
No Explanation available for this question

In the circuit shown in the figure, the current source I = 1 A, voltage source V = 5V,R1 = R2 = R3 = 1 W, L1 = L2 = L3 = 1H,C1 = C2 = 1F. The currents (in A) through R3 and the voltage source V respectively will be

1.  1,4

2.  5,1

3.  5,2

4.  5,4

View Answer  
4
Correct Answer :

5,4


Explanation :
No Explanation available for this question

The parameter type and the matrix representation of the relevant two port parameters that describe the circuit shown are

1.  z parameters,

2.  h parameters,

3.  h parameters,

4.  z parameters,

View Answer  
4
Correct Answer :

h parameters,


Explanation :
No Explanation available for this question

Consider the following statements with reference to the equation δp/δt 1.This is a point form of the continuity equation 2.Divergence of current density is equal to the decrease of charge per unit volume per unit at every point 3.This is Max well's divergence equation 4.This represents the conservation of charge Select the correct answer

1.  Only 2 and 4 are true

2.  1, 2 and 3 are true

3.  2, 3 and 4 are true

4.  1, 2 and 4 are true

View Answer  
4
Correct Answer :

1, 2 and 4 are true


Explanation :
No Explanation available for this question

The circuit shown in the figure is energized by a sinusoidal voltage source V1 at a frequency which causes resonance with a current of I The phasor diagram which is applicable to this circuit

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

An ideal capacitor is charged to a voltage V0 and connected at t = 0 across an ideal inductor L. (The circuit now consists of a capacitor and inductor alone). If we let ω0 = 1/√LC, the voltage across the capacitor at time t > 0 is given by  

1.  V0

2.  V0 cos (ω0t)

3.  V0 sin (ω0t)

4.  V0 e-ω0t cos (ω0t)

View Answer  
4
Correct Answer :

V0 cos (ω0t)


Explanation :
No Explanation available for this question

A 400 V, 50 Hz, three phase balanced source supplies power to a star connected load whose rating is 12√3 kVA, 0.8 pf (lag). The rating (in kVAR) of the delta connected (capacitive) reactive power bank necessary to bring the pf to unity is

1.  28.78

2.  21.60

3.  16.60

4.  12.47

View Answer  
4
Correct Answer :

12.47


Explanation :
No Explanation available for this question

An energy meter connected to an immersion heater (resistive) operating on an AC 230 V, 50 Hz, AC single phase source reads 2.3 units (kWh) in 1 hour. The heater is removed from the supply and now connected to a 400 V peak to peak square wave source of 150 Hz. The power in kW dissipated by the heater will be

1.  3.478

2.  1.739

3.  1.540

4.  0.870

View Answer  
4
Correct Answer :

1.739


Explanation :
No Explanation available for this question

A 220 V DC machine supplies 20 A at 200 V as a generator. The armature resistance is 0.2 ohm. If the machine is now operated as a motor at same terminal voltage and current but with the flux increased by 10%, then ratio of motor speed to generator speed is

1.  0.87

2.  0.95

3.  0.96

4.  1.06

View Answer  
4
Correct Answer :

0.87


Explanation :
No Explanation available for this question

A synchronous generator is feeding a zero power factor (lagging) load at rated current.The armature reaction is

1.  magnetizing

2.  demagnetizing

3.  cross-magnetizing

4.  ineffective

View Answer  
4
Correct Answer :

demagnetizing


Explanation :
No Explanation available for this question
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