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An electric pole 5 m high is fixed into the foundation. It carries a wire at the top and is free to move sideways. The effective length of the pole is
- a)3.25 m
- b)4,0m
- c)5.0 m
- d)10.0 m
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
An electric pole 5 m high is fixed into the foundation. It carries a w...
It is equivalent to a compression member whose one end is fixed against rotation and position and the other and neither restrained against rotation nor fixed in position in the direction perpendicular to wire. So effective length = 2L = 10 m.
In the direction of wire, the pole is hinged at wire end so effective length = 0.8L = 4.0 m.
In the direction of wire, the pole is hinged at wire end so effective length = 0.8L = 4.0 m.
Most Upvoted Answer
An electric pole 5 m high is fixed into the foundation. It carries a w...
Given: Height of electric pole = 5 m
To find: Effective length of the pole
Explanation:
The effective length of the pole is the length that takes into account the sideways movement of the pole due to wind or other external forces. When a force is applied to the top of the pole, it causes the pole to bend sideways. This bending causes the effective length of the pole to be shorter than its actual length.
The effective length of the pole can be calculated using the formula:
Le = K * L
Where Le is the effective length, L is the actual length of the pole and K is the effective length factor. The effective length factor depends on the type of support at the bottom of the pole and the type of fixing at the top of the pole.
For a free-standing pole with a wire at the top, the effective length factor is approximately 0.8. Therefore, the effective length of the pole is:
Le = 0.8 * 5 = 4.0 m
Hence, the correct answer is option (B) 4.0 m.
To find: Effective length of the pole
Explanation:
The effective length of the pole is the length that takes into account the sideways movement of the pole due to wind or other external forces. When a force is applied to the top of the pole, it causes the pole to bend sideways. This bending causes the effective length of the pole to be shorter than its actual length.
The effective length of the pole can be calculated using the formula:
Le = K * L
Where Le is the effective length, L is the actual length of the pole and K is the effective length factor. The effective length factor depends on the type of support at the bottom of the pole and the type of fixing at the top of the pole.
For a free-standing pole with a wire at the top, the effective length factor is approximately 0.8. Therefore, the effective length of the pole is:
Le = 0.8 * 5 = 4.0 m
Hence, the correct answer is option (B) 4.0 m.
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An electric pole 5 m high is fixed into the foundation. It carries a wire at the top and is free to move sideways. The effective length of the pole isa)3.25 mb)4,0mc)5.0 md)10.0 mCorrect answer is option 'B'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about An electric pole 5 m high is fixed into the foundation. It carries a wire at the top and is free to move sideways. The effective length of the pole isa)3.25 mb)4,0mc)5.0 md)10.0 mCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An electric pole 5 m high is fixed into the foundation. It carries a wire at the top and is free to move sideways. The effective length of the pole isa)3.25 mb)4,0mc)5.0 md)10.0 mCorrect answer is option 'B'. Can you explain this answer?.
An electric pole 5 m high is fixed into the foundation. It carries a wire at the top and is free to move sideways. The effective length of the pole isa)3.25 mb)4,0mc)5.0 md)10.0 mCorrect answer is option 'B'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about An electric pole 5 m high is fixed into the foundation. It carries a wire at the top and is free to move sideways. The effective length of the pole isa)3.25 mb)4,0mc)5.0 md)10.0 mCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An electric pole 5 m high is fixed into the foundation. It carries a wire at the top and is free to move sideways. The effective length of the pole isa)3.25 mb)4,0mc)5.0 md)10.0 mCorrect answer is option 'B'. Can you explain this answer?.
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