Question

The magnetic induction in air at a point
5 cm from a long straight wire carrying a
current of 15 A is
(1) 7.5x10-5 Tesla
(2) 6x10-5 Tesla
(3) 6x 10-4 Tesla
(4) 9x10-5 Tesla​

Answer 1

USE THE FORMULA

B=

$\frac{ \mu \: i}{2\pi \: a}$

where I is current

a= distance

The value of mu(not) is

10^-4×4π

soln refers to the attachment

Answer 2

Answer:

Option number( 2)6x10-5 Tesla is the correct answer.

Explanation:

Given

d = 5 cm = 5 × 10^-2 m

i = 15 ampere

To find

B = ?

By applying formula of magnetic induction

We have,

For solution prefers to the attachment.

Here,

d is distance

i is the current flowing in the wire.

B is the magnetic induction.

MAGNETIC INDUCTION

• It is a vector quantity.
• Space around a source of magnetic materials where magnetic effects are experienced by another source of magnet or magnetic material.
• Magnetic induction is also known as magnetic field , magnetic flux density.
• Si unit of magnetic induction is Tesla (T).
• Other unit of magnetic induction is Gauss (G).