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Results tagged with homework-and-exercises
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user 268590
Applies to questions of primarily educational value - not only questions that arise from actual homework assignments, but any question where it is preferable to guide the asker to the answer rather than giving it away outright. Please READ THE GUIDANCE IN META before asking homework-like questions.
1
vote
1
answer
1k
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Finding the radius of curvature and length of catenary [closed]
A uniform massive string of mass $m$ and length $l$ is fixed between two rigid supports. Angles made by the tangents on the string at points of suspension are shown in the figure. The point C is the …
- 362
1
vote
2
answers
339
views
How to find magnetic field as a function of $r$ from axis of solenoid?
I was solving this problem:
Whose answer is given as:
I understand the part for calculating the field outside the cylinder, but for inside, I don't get it. If we apply Ampère's circuital law by tak …
- 362
2
votes
1
answer
905
views
Why should there be an induced electric field if magnetic field is constant? [closed]
Problem statement:
The curved surface of a very long hollow non conducting cylinder of radius $R$ is uniformly charged with surface charge density $\sigma$. A non conducting small circular ring of ra …
- 362