Network Theory Mock Test 5

1. In the figure below, the values of the resistance R₁ and inductance L₁ of a coil are to be calculated after the bridge is balanced. The values are _________________

2. In three phase system, the line voltage V_RY is equal to?

3. Which of the following voltage is a phase voltage in the delta connection?

4. The simultaneous applications of signals x (t) and y (t) to the horizontal and vertical plates respectively, of an oscilloscope, produce a vertical figure of 8 displays. If P and Q are constants and x(t) = P sin (4t + 30), then y(t) is equal to _________

5. The average power absorbed by an impedance Z = 30 – j 70 Ω when a voltage V = 120∠0° is applied is _____________

6. The line currents are ________ behind respective phase currents in a delta connected system.

7. The readings of polar type potentiometer are
I = 12.4∠27.5°
V = 31.5∠38.4°
Then, Reactance of the coil will be?

8. In a delta connected system, the voltage across the terminals R and Y is 400∠0⁰. Find the line voltage V_BR.

9. Initial voltage on capacitor VO as marked |V_O| = 5 V, V_S = 8 u (t), where u (t) is the unit step. The voltage marked V at t=0⁺ is _____________

10. A capacitor of capacitance 50 μF is connected in parallel to another capacitor of capacitance 100 μF. They are connected across a time-varying voltage source. At a particular time, the current supplied by the source is 5 A. The magnitude of instantaneous current through the capacitor of capacitance 100 μF is?