GravitationHard
Question
A long straight wire of radius a carries a steady current i. the current is uniformly distributed across its cross section .The ratio of the magnetic field at a/2 and 2a is
Options
A.1/2
B.1/4
C.4
D.1
Solution
Here, current is uniformly distributed across the cros-section of the wire, therforecurrent enclosed in the amperean path
formed at a distance r1
× 1, where I total current∴ Magnetic field at
P1(B1) =
Now, magnatic field at point P2,
(B2) =
∴ Required Ratio =
Create a free account to view solution
View Solution FreeMore Gravitation Questions
The unbalanced chemical reactions given in List-I show missing reagent or condition (?) which are provided in List-II. M...Two bodies of masses m and 4 m are placed at a distance r. The gravitational potential at a point on the line joining th...Two particles of mass m1 and m2 are initially at rest and infinitely separated from each other. Due to mutual interactio...An object weighs 10 N at the north pole of the Earth. In a geostationary satellite distance 7R from the centre of the Ea...A satellite is moving with a constant speed ′V′ in a circular orbit about the earth. An object of mass ̸...