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In a 3-phase 400V, 4-wire system, two incandescent lamps, one having 230 V, 100 W specification and the other 230 V, 200 W, are connected between R phase-neutral and Y phase-neutral, respectively. If the neutral wire breaks-
- a)100 W lamp will fuse first
- b)200 W lamp will fuse first
- c)both the lamps will fuse together
- d)both the lamps will glow
Correct answer is option 'A'. Can you explain this answer?
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If the neutral wire breaks, 100 W lamp will fuse first
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The given scenario involves a 3-phase 400V, 4-wire system with two incandescent lamps connected between the R phase-neutral and Y phase-neutral. One lamp has a specification of 230V and 100W, while the other has a specification of 230V and 200W. The neutral wire breaks, and we need to determine which lamp will fuse first.
1. Explanation of the 3-phase 400V, 4-wire system:
- In a 3-phase system, there are three different phases - R, Y, and B (representing red, yellow, and blue).
- The voltage between any two phases is 400V, enabling the system to provide higher power capacity for electrical loads.
- The fourth wire is the neutral wire, which is used for returning the unbalanced current back to the source.
- This 4-wire system is commonly used in industrial and commercial applications.
2. Understanding the lamp specifications:
- The first lamp has a specification of 230V and 100W, indicating that it operates at 230V and consumes 100W of power.
- The second lamp has a specification of 230V and 200W, indicating that it operates at 230V and consumes 200W of power.
- These lamps are designed to operate at their specified voltage and wattage.
3. Analysis of the neutral wire break scenario:
- When the neutral wire breaks, the lamps are no longer connected to the source neutral.
- In a 4-wire system, the neutral wire is responsible for carrying the unbalanced current from the loads back to the source.
- Without the neutral wire, the current flowing through the lamps will be unbalanced, leading to potential problems.
4. Determining which lamp will fuse first:
- The lamp with a lower power rating (100W) will fuse first.
- This is because the lamp with a higher power rating (200W) requires a higher current to operate.
- When the neutral wire breaks, the current flowing through the 100W lamp will be higher compared to the 200W lamp due to its lower resistance.
- The higher current in the 100W lamp will lead to excessive heat generation, causing it to fuse first.
In conclusion, when the neutral wire breaks in a 3-phase 400V, 4-wire system with two incandescent lamps connected between the R phase-neutral and Y phase-neutral, the lamp with a lower power rating (100W) will fuse first. This is because it experiences a higher current due to its lower resistance, leading to excessive heat generation and subsequent fuse failure.
1. Explanation of the 3-phase 400V, 4-wire system:
- In a 3-phase system, there are three different phases - R, Y, and B (representing red, yellow, and blue).
- The voltage between any two phases is 400V, enabling the system to provide higher power capacity for electrical loads.
- The fourth wire is the neutral wire, which is used for returning the unbalanced current back to the source.
- This 4-wire system is commonly used in industrial and commercial applications.
2. Understanding the lamp specifications:
- The first lamp has a specification of 230V and 100W, indicating that it operates at 230V and consumes 100W of power.
- The second lamp has a specification of 230V and 200W, indicating that it operates at 230V and consumes 200W of power.
- These lamps are designed to operate at their specified voltage and wattage.
3. Analysis of the neutral wire break scenario:
- When the neutral wire breaks, the lamps are no longer connected to the source neutral.
- In a 4-wire system, the neutral wire is responsible for carrying the unbalanced current from the loads back to the source.
- Without the neutral wire, the current flowing through the lamps will be unbalanced, leading to potential problems.
4. Determining which lamp will fuse first:
- The lamp with a lower power rating (100W) will fuse first.
- This is because the lamp with a higher power rating (200W) requires a higher current to operate.
- When the neutral wire breaks, the current flowing through the 100W lamp will be higher compared to the 200W lamp due to its lower resistance.
- The higher current in the 100W lamp will lead to excessive heat generation, causing it to fuse first.
In conclusion, when the neutral wire breaks in a 3-phase 400V, 4-wire system with two incandescent lamps connected between the R phase-neutral and Y phase-neutral, the lamp with a lower power rating (100W) will fuse first. This is because it experiences a higher current due to its lower resistance, leading to excessive heat generation and subsequent fuse failure.
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In a 3-phase 400V, 4-wire system, two incandescent lamps, one having 230 V, 100 W specification and the other 230 V, 200 W, are connected between R phase-neutral and Y phase-neutral, respectively. If the neutral wire breaks-a)100 W lamp will fuse firstb)200 W lamp will fuse firstc)both the lamps will fuse togetherd)both the lamps will glowCorrect answer is option 'A'. Can you explain this answer?
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In a 3-phase 400V, 4-wire system, two incandescent lamps, one having 230 V, 100 W specification and the other 230 V, 200 W, are connected between R phase-neutral and Y phase-neutral, respectively. If the neutral wire breaks-a)100 W lamp will fuse firstb)200 W lamp will fuse firstc)both the lamps will fuse togetherd)both the lamps will glowCorrect answer is option 'A'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about In a 3-phase 400V, 4-wire system, two incandescent lamps, one having 230 V, 100 W specification and the other 230 V, 200 W, are connected between R phase-neutral and Y phase-neutral, respectively. If the neutral wire breaks-a)100 W lamp will fuse firstb)200 W lamp will fuse firstc)both the lamps will fuse togetherd)both the lamps will glowCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a 3-phase 400V, 4-wire system, two incandescent lamps, one having 230 V, 100 W specification and the other 230 V, 200 W, are connected between R phase-neutral and Y phase-neutral, respectively. If the neutral wire breaks-a)100 W lamp will fuse firstb)200 W lamp will fuse firstc)both the lamps will fuse togetherd)both the lamps will glowCorrect answer is option 'A'. Can you explain this answer?.
In a 3-phase 400V, 4-wire system, two incandescent lamps, one having 230 V, 100 W specification and the other 230 V, 200 W, are connected between R phase-neutral and Y phase-neutral, respectively. If the neutral wire breaks-a)100 W lamp will fuse firstb)200 W lamp will fuse firstc)both the lamps will fuse togetherd)both the lamps will glowCorrect answer is option 'A'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about In a 3-phase 400V, 4-wire system, two incandescent lamps, one having 230 V, 100 W specification and the other 230 V, 200 W, are connected between R phase-neutral and Y phase-neutral, respectively. If the neutral wire breaks-a)100 W lamp will fuse firstb)200 W lamp will fuse firstc)both the lamps will fuse togetherd)both the lamps will glowCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a 3-phase 400V, 4-wire system, two incandescent lamps, one having 230 V, 100 W specification and the other 230 V, 200 W, are connected between R phase-neutral and Y phase-neutral, respectively. If the neutral wire breaks-a)100 W lamp will fuse firstb)200 W lamp will fuse firstc)both the lamps will fuse togetherd)both the lamps will glowCorrect answer is option 'A'. Can you explain this answer?.
Solutions for In a 3-phase 400V, 4-wire system, two incandescent lamps, one having 230 V, 100 W specification and the other 230 V, 200 W, are connected between R phase-neutral and Y phase-neutral, respectively. If the neutral wire breaks-a)100 W lamp will fuse firstb)200 W lamp will fuse firstc)both the lamps will fuse togetherd)both the lamps will glowCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for SSC.
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ample number of questions to practice In a 3-phase 400V, 4-wire system, two incandescent lamps, one having 230 V, 100 W specification and the other 230 V, 200 W, are connected between R phase-neutral and Y phase-neutral, respectively. If the neutral wire breaks-a)100 W lamp will fuse firstb)200 W lamp will fuse firstc)both the lamps will fuse togetherd)both the lamps will glowCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice SSC tests.
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