Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

Olympiad workbook

Exam: Olympiad workbook
Subject: NSEP
Chapter: Magnetic Effects of Current

Olympiad workbook · NSEP · Magnetic Effects of Current

An infinitely long straight non-magnetic conducting wire of radius...

An infinitely long straight non-magnetic conducting wire of radius

a

carries a dc current

I

. The magnetic field

B

, at a distance

r(r < a)

from axis of the wire is

Options

A $\mu_0 I / 2 \pi a$
B $\mu_0 \operatorname{Ir} / 2 \pi a^2$
C $2 \mu_0 I r / \pi a^2$
D $\mu_0 I r^2 / 2 \pi a^3$

Correct answer

B. $\mu_0 \operatorname{Ir} / 2 \pi a^2$

Step-by-step solution

No Solution

Practice Magnetic Effects of Current on Quantrex Academy →

More from Magnetic Effects of Current

A wire in the shape of a square frame carries a current I and produces a magnetic field… Olympiad workbook A coil 2.0 cm in diameter has 300 turns. If the coil carries a current of 10 mA and lies… Olympiad workbook A neutral metal bar moves at a constant velocity v to the right through a region of… Olympiad workbook Paragraph: The following questions are concerned with experiments on the characterization… Olympiad workbook A rectangular loop carrying a current is placed in a uniform magnetic field. The net… Olympiad workbook The SI unit of permeability of free space is Olympiad workbook A tightly wound long solenoid carries a current 5 A . An electron shot perpendicular to… Olympiad workbook A fixed horizontal wire M carries 200 A current. Another wire N running parallel to M… Olympiad workbook Full Magnetic Effects of Current list All Olympiad workbook PYQs