Network Theory Mock Test 5

1. A 50 μF capacitor, when connected in series with a coil having a resistance of 40Ω, resonates at 1000 Hz. The circuit is in resonating condition. The voltage across the capacitor is __________

2. For a unit step signal u (t), the response is V₁ (t) = (1-e^-3t) for t>0. If a signal 3u (t) + δ(t) is applied, the response will be (considering zero initial conditions)?

3. A symmetrical three-phase, three-wire 440V supply is connected to star-connected load. The impedances in each branch are Z_R = (2+j3) Ω, Z_Y = (1-j2) Ω, Z_B = (3+j4) Ω. Find Z_BR.

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

5. In a delta-connected system, the currents I_R = I_B = I_Y =?

6. In wye or star connection _____________ of the three phases are joined together within the alternator.

7. Figure below represents three phases of an alternator. The phase voltage for the star connection among the options given below is?

8. In a star connected system, the phasors V_RN, V_YN are ____ apart.

9. A three-phase balanced delta connected load of (4+j8) Ω is connected across a 400V, 3 – Ø balanced supply. Determine the phase current I_R. Assume the phase sequence to be R_YB.

10. A three-phase balanced delta connected load of (4+j8) Ω is connected across a 400V, 3 – Ø balanced supply. Determine the phase current I_Y.