A long straight wire of radius a carries...

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 magnetis field at `(a)//(2) and (2a)` is

`1//4`

`1//2`

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

MAGNETISM
MOTION|Exercise EXERCISE-4 (LEVEL-II)|40 Videos
MAGNETISM
MOTION|Exercise EXERCISE-3 (Level-II)|23 Videos
LOGIC GATES
MOTION|Exercise EXERCISE - 2|10 Videos
MAGNETISM -1
MOTION|Exercise Exercise - 3 SECTION -A|56 Videos

Similar Questions

Explore conceptually related problems

A long staright wire of radius a carries a steady current I . The curent is unifromly distributed over its cross-section. The ratio of the magnetic fields B and B' , at radial distances (a)/(2) and 2a respectively from the axis of the wire is:

Figure shows a long straight wire of circular crosssection (radius a) carrying steady current I. The current I is uniformly distributed across this crosssection. Calculate the magnetic field in the region r lt a and r gt a .

A long straight wire of radius R carries a steady current which is uniformly distributed through the cross-section of the wire. The magnitudes of the magnetic field at distance r_(1) and r_(2) from the centre of the wire are B_(1) and B_(2) respectively. Then

Figure shows a long straight wire of a circular cross-section (radius a) carrying steady current l. The current l is uniformly distributed across this cross-section. Calculate the magnetic field in the region r lt a and r gt a

A long straight wire of a circular cross-section of radius a carries a steady current I. The current is uniformly distributed across the cross-section. Apply Amperes circuital law to calculate the magnetic field at a point at distance r in the region for (i) rlta and (ii) rgta .

A long cylindrical wire carries a steady current which is uniformly distributed across its cross section. Which of the following is true?

MOTION-MAGNETISM -EXERCISE-4 (LEVEL-I)

A current I flows along the lenght of an infinetely long, straight, th...
Text Solution
|
A charged particle with charge q enters a region of constant, uniform ...
Text Solution
|
A long straight wire of radius a carries a steady current i. The curre...
Text Solution
|
Two identical conducting wires AOB and COD are placed at right angles ...
Text Solution
|
A horizontal overheadpowerline is at height of 4 m from the ground and...
Text Solution
|
Relative permittivity and permeability of a material are epsilon(r) ...
Text Solution
|
The magnitude of the magnetic field (B) due to loop ABCD at the origin...
Text Solution
|
Due to the presence of the current I1 at the origin in the figure.
Text Solution
|
Two long parallel wires are at a distance 2d apart. They carry stead...
Text Solution
|
A rectangular loop has a sliding connector PQ of length l and resistan...
Text Solution
|
A current I flows an infinitely long wire with cross section in the fo...
Text Solution
|
A boat is moving due east in a region where the earth's magnetic field...
Text Solution
|
A thin circular disk of radius R is uniformly charged with density sig...
Text Solution
|
A charge Q is uniformly distributed over the surface of non - conducti...
Text Solution
|
Proton , deuton and alpha particle of same kinetic energy are moving i...
Text Solution
|
The coercitivity of a small magnet where the ferromagnet gets demagnet...
Text Solution
|
A rectangular loop of sides 10 cm and 5 cm carrying a current I of 12 ...
Text Solution
|
Two coaxial solenoids of different radius carry current I in the same ...
Text Solution
|
Two long current carrying thin wires , both with current I, are held b...
Text Solution
|
Two identical wires A and B , each of length 'l', carry the same curre...
Text Solution
|