Home
Class 11
PHYSICS
The magnetic induction at apoint P which...

The magnetic induction at apoint P which is at the distance 4 cm from a long current carrying wire is `10^(-3) T`. The field of induction at a distance 12 cm from the current will be

A

`3.33xx10^(-4)T`

B

`1.11xx10^(-4)T`

C

`3xx10^(-3)T`

D

`9xx10^(-3) T`

Text Solution

Verified by Experts

B due to a carrying straight conductor at a distance r from it is given by
`B= ((mu_(0))/(4pi))((2I)/(r))" "therefore B prop 1/r` for the same current
`therefore (B_(2))/(B_(1))=(r_(1))/(r_(2))=(4)/(12) =1/3`
`therefore B_(2) =(B_(1))/(3) =(10^(-3))/(3) =(10)/(3) xx10^(-4)`
`therefore B_(2) =3.33 xx10^(-4) T`
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    MARVEL PUBLICATION|Exercise MCQ (GRAPHICAL MCQS)|2 Videos

  • FRICTIONAL IN SOLIDS AND LIQUIDS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP|10 Videos

  • MAGNETISM

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP|10 Videos

Similar Questions

Explore conceptually related problems

The magnetic induction at a point P which is at a distance of 4 cm from a long current carrying wire is 10^(-8) T. The induction at a distance 12 cm from same current carrying wire is

Magnetic field at a distance 'a' from long current carrying wire is proportional to -

The magnetic field at a distance r from a long wire carryimg current I is 0.4 T. The magnetic field at a distance 2r is

The magnetic induction at any point due to a long straight wire carrying a current is

What is the magnetic induction at a distance of 5 cm from a straight wire carrying a current of 5 mA ?

If the ratio of magnetic fields at two point in a definite direction due to a long current carrying wire is 3/4, then the ratio of the distances of these points from the wire will be :

The magnetic field at a perpendicular distance of 2cm from an infinite straight current carrying conductor is 2xx10^-6T . The current in the wire is