NEET Solved Paper 2019 Question 26

Question: A cylindrical conductor of radius R is carrying a constant current. The plot of the magnitude of the magnetic field, B with the distance, d, from the centre of the conductor, is correctly represented by the figure: [NEET 5-5-2019]

Options:

A)

B)

C)

D)

Show Answer

Answer:

Correct Answer: A

Solution:

  • $ B _{inside}=\frac{{\mu_0}id}{2\pi R^{2}} $ $ B _{in}\propto d $ $ B _{out}=\frac{{\mu_0}i}{2\pi d} $ $ B _{out}\propto \frac{1}{d} $