What happens to the magnetic field of the coil on its axis at a point very very far away from its centre, if the radius of the coil is doubled keeping the current flowing through it unchanged?
Asked by Topperlearning User
| 18th May, 2015,
03:37: PM
Expert Answer:
The magnetic field at a point on the axis of the coil is given by
If the point lies very very far away , then x>>a
Therefore, ………………………..1
From Eq.1 if we double the radius (a) of the coil, the field becomes four times.
Answered by
| 18th May, 2015,
05:37: PM
Concept Videos
- why the flux of magnetic field over a closed surface always zero?
- derivation and expression for the magnetic induction at point dou to strith current carring condoctor
- An electron and a proton having equal momenta enter a uniform magnetic field at right angles to the field lines. What will be the ratio of the radii of curvature of their trajectories?
- State Biot Savart's law for the magnetic field produced at a point due to current element.
- How will you find the direction of the magnetic field produced due to the current element of conductor?
- Find the magnetic field produced by a long straight conductor of length L carrying current I of negligible area of cross section at a point on the conductor itself?
- When will be the magnetic field produced at a point due to current element maximum and minimum?
- Find the magnetic field induction at a point on the axis of a circular coil carrying current.
- Find the magnetic field produced if the point lies at the centre of circular coil carrying current?
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Sign Up
Verify mobile number
Enter the OTP sent to your number
Change