A very long straight wire of radius r ca...

A very long straight wire of radius r carries current I. Intensity of magnetic field B at point lying at a perpendicular distance 'a' from the axis is `alpha` ______ . (where `altr`)

`a^(2)`

`1/a^(2)`

`1/a`

Text Solution

Verified by Experts

The correct Answer is:

`Bpropa`

Topper's Solved these Questions

MOVING CHARGES AND MAGNETISM
KUMAR PRAKASHAN|Exercise SECTION D (MULTIPLE CHOICE QUESTIONS)|108 Videos
MAGNETISM AND MATTER
KUMAR PRAKASHAN|Exercise SECTION D Multiple Choice Questions (MCQs) (MCQs asked in Competitive Exams) MCQs asked in Board Exam and GUJCET|7 Videos
RAY OPTICS AND OPTICAL INSTRUMENTS
KUMAR PRAKASHAN|Exercise SECTION-D (MULTIPLE CHOICE QUESTIONS (MCQs))(MCQs ASKED IN COMPETITIVE EXAMS)|142 Videos

Similar Questions

Explore conceptually related problems

An extremely long straight wire, with radius of cross-section a, carries current I. Then ratio of magnetic fields at distances a/2 and 2a from its axis would be ______ .

A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 20 cm from the wire?

A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 35 cm from the wire ?

Write formula of the magnetic field at r perpendicular distance for finite current carrying wire.

A long straight solid metal wire of radius R carries a current I, uniformly distributed over its circular cross-section. Find the magnetic field at a distance r from axis of wire (i) inside and (ii) outside the wire.

A small circular flexible loop of wire of radius r carries a current I. It is placed in a uniform magnetic field B. The tension in the loop will be doubled if ______ .

A current of 1 ampere is passed through a straight wire of length 2.0 meters. What value of magnetic field at a point in air at a distance of 3 meters from either end of wire and on the axis of wire ?

At a distance of 10 cm from a long straight wire carrying current, the magnetic field is 0.04 T. At the distance of 40 cm, the magnetic field will be ______ .

KUMAR PRAKASHAN-MOVING CHARGES AND MAGNETISM-SECTION D (MCQs ASKED IN COMPETITIVE EXAMS)

Ionized hydrogen atoms and alpha-particles with same momenta enters pe...
Text Solution
|
The effective length of a magnet is 31.4 cm and its pole strength is 0...
Text Solution
|
Equal currents are passing through two very long and straight parallel...
Text Solution
|
A galvanometer of resistance 50Omega is connecter to a battery of 8 V ...
Text Solution
|
Equal currents are passing through two very long and straight parallel...
Text Solution
|
An alpha particle of mass m moves on a circular path of radius r in a ...
Text Solution
|
A long straight wire in the horizontal plane carries a current of 50 A...
Text Solution
|
A proton is moving perpendicular to a uniform magnetic field of 2.5 te...
Text Solution
|
A particle of mass m and charge q is incident on xz plane with velocit...
Text Solution
|
An electron having mass 9.1xx10^(-31)kg, charge 1.6xx10^(-19)C and mov...
Text Solution
|
Two parallel very long straight wires carrying current of 5A each are ...
Text Solution
|
A very long straight wire of radius r carries current I. Intensity of ...
Text Solution
|
The dimensional formula of effective torsional constant of spring is ...
Text Solution
|
There are 50 turns per cm length in a very long solenoid. It carries a...
Text Solution
|
The gyromagnetic of an electron = specific charge of an electron.
Text Solution
|
A straight wire of mass 200g and length 1.5m carries a current of 2A. ...
Text Solution
|
Unit of Bohr magneton is …..
Text Solution
|
Current sensivity of galvanometer in inversely proportional to……
Text Solution
|
Frequency of cyclotron is independent of …….
Text Solution
|
A circular coil of a wire containing 100 turns each of radius 2cm carr...
Text Solution
|