 
			 
			MCQOPTIONS
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				This section includes 9 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 30 , Z2 = 40 60 , Z3 = 10 -90 are delta-connected to a 400V, 3 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 30 , Z2 = 40 60 , Z3 = 10 -90 are delta-connected to a 400V, 3 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 30 , Z2 = 40 60 , Z3 = 10 -90 are delta-connected to a 400V, 3 system. Find the power in the R phase. | 
| A. | 6628 | 
| B. | 6728 | 
| C. | 6828 | 
| D. | 6928 | 
| Answer» E. | |
| 4. | The three impedances Z1 = 20 30 , Z2 = 40 60 , Z3 = 10 -90 are delta-connected to a 400V, 3 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 30 , Z2 = 40 60 , Z3 = 10 -90 are delta-connected to a 400V, 3 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 30 , Z2 = 40 60 , Z3 = 10 -90 are delta-connected to a 400V, 3 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 30 , Z2 = 40 60 , Z3 = 10 -90 are delta-connected to a 400V, 3 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 30 , Z2 = 40 60 , Z3 = 10 -90 are delta-connected to a 400V, 3 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 30 , Z2 = 40 60 , Z3 = 10 -90 are delta-connected to a 400V, 3 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 | |