MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the power in the B phase. |
| A. | 0 |
| B. | 1 |
| C. | 3 |
| D. | 2 |
| Answer» B. 1 | |
| 2. |
The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the power in the Y phase. |
| A. | 1000 |
| B. | 2000 |
| C. | 3000 |
| D. | 4000 |
| Answer» C. 3000 | |
| 3. |
The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the power in the R phase. |
| A. | 6628 |
| B. | 6728 |
| C. | 6828 |
| D. | 6928 |
| Answer» E. | |
| 4. |
The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the line current I3. |
| A. | (24.646+j20) A |
| B. | (-24.646+j20) A |
| C. | (-24.646-j20) A |
| D. | (24.646-j20) A |
| Answer» D. (24.646-j20) A | |
| 5. |
The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the line current I2. |
| A. | (-27.32+j10) A |
| B. | (27.32+j10) A |
| C. | (-27.32-j10) A |
| D. | (27.32-j10) A |
| Answer» B. (27.32+j10) A | |
| 6. |
The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the line current I1. |
| A. | (-51.96-j10) A |
| B. | (-51.96+j10) A |
| C. | (51.96+j10) A |
| D. | (51.96+j10) A |
| Answer» D. (51.96+j10) A | |
| 7. |
The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the phase current IB. |
| A. | (34.64-j20) A |
| B. | (34.64+j20) A |
| C. | (-34.64+j20) A |
| D. | (-34.64-j20) A |
| Answer» E. | |
| 8. |
The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the phase current IY. |
| A. | (10-j0) A |
| B. | (10+j0) A |
| C. | (-10+j0) A |
| D. | (-10-j0) A |
| Answer» D. (-10-j0) A | |
| 9. |
The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Determine the phase current IR. |
| A. | (17.32-j10) A |
| B. | (-17.32-j10) A |
| C. | (17.32+j10) A |
| D. | (-17.32+j10) A |
| Answer» B. (-17.32-j10) A | |
| 10. |
IN_THE_QUESTION_2_FIND_THE_POWER_IN_THE_Y_PHASE.?$ |
| A. | 1000 |
| B. | 2000 |
| C. | 3000 |
| D. | 4000 |
| Answer» C. 3000 | |
| 11. |
In_the_question_2_find_the_power_in_the_B_phase.$ |
| A. | 0 |
| B. | 1 |
| C. | 3 |
| D. | 2 |
| Answer» B. 1 | |
| 12. |
In the question 2 find the power in the R phase? |
| A. | 6628 |
| B. | 6728 |
| C. | 6828 |
| D. | 6928 |
| Answer» E. | |
| 13. |
From the question 2, find the line current I1. |
| A. | (-51.96-j10) A |
| B. | (-51.96+j10) A |
| C. | (51.96+j10) A |
| D. | (51.96+j10) A |
| Answer» D. (51.96+j10) A | |
| 14. |
Find the phase current IY from the question 2. |
| A. | (10-j0) A |
| B. | (10+j0) A |
| C. | (-10+j0) A |
| D. | (-10-j0) A |
| Answer» D. (-10-j0) A | |
| 15. |
The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Determine the phase current IR.$ |
| A. | (17.32-j10) A |
| B. | (-17.32-j10) A |
| C. | (17.32+j10) A |
| D. | (-17.32+j10) A |
| Answer» B. (-17.32-j10) A | |
| 16. |
If the system is a three-wire system, the currents flowing towards the load in the three lines must add to ___ at any given instant. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | zero |
| Answer» E. | |