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A metallic rod of length l is tied to a string of length 2l and made to rotate with angular speed ω on horizontal table with one end of the string fixed. If the induced emf across the ends of the rod is e, then the vertical magnetic field in the region is.
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A metallic rod of length l is tied to a string of length 2l and made t...
Given, the length of the rod = L, length of the string = 2L, induced emf across the ends of the rod = e 
Then L1 = 2L, L2 = 2L + L = 3L
Let the vertical magnetic field in the region is B, then from equation 1, 

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A metallic rod of length l is tied to a string of length 2l and made to rotate with angular speed ω on horizontal table with one end of the string fixed. If the induced emf across the ends of the rod is e, then the vertical magnetic field in the region is.a)b)c)d)Correct answer is option 'A'. Can you explain this answer?
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