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Moving Charges and Magnetism question

2021 · Q130
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Moving Charges and Magnetism question

2021 · Q130

NEETPhysicsMoving Charges and MagnetismMCQ+4 / −1
A thick current carrying cable of radius 'R' carries current 'I' uniformly distributed across its cross section. The variation of magnetic field B(r) due to the cable with the distance 'r' from the axis of the cable is represented by :
  1. A
    NEET 2021 Physics - Moving Charges and Magnetism Question 19 English Option 1
  2. B
    NEET 2021 Physics - Moving Charges and Magnetism Question 19 English Option 2
  3. C
    NEET 2021 Physics - Moving Charges and Magnetism Question 19 English Option 3
  4. D
    NEET 2021 Physics - Moving Charges and Magnetism Question 19 English Option 4
View written solutionFree

Correct answer: D

From Ampere's circuital law

Bin=μ0Ir2πR2{B_{in}} = {{{\mu _0}Ir} \over {2\pi {R^2}}}Bin​=2πR2μ0​Ir​

B0=μ0I2πr{B_0} = {{{\mu _0}I} \over {2\pi r}}B0​=2πrμ0​I​

NEET 2021 Physics - Moving Charges and Magnetism Question 19 English Explanation

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