A long wire carries a steady current . I...

A long wire carries a steady current . It is bent into a circle of one turn and the magnetic field at the centre of the coil is `B`. It is then bent into a circular loop of `n` turns. The magnetic field at the centre of the coil will be

`2n^(2) B`

`n^(2)B`

2nB

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

MAGNETIC EFFECT OF ELECTRIC CURRENT
TARGET PUBLICATION|Exercise Evaluation Test|12 Videos
MAGNETIC EFFECT OF ELECTRIC CURRENT
TARGET PUBLICATION|Exercise Critical Thinking Introduction|41 Videos
LAWS OF MOTION
TARGET PUBLICATION|Exercise EXERCISE|281 Videos
MAGNETISM
TARGET PUBLICATION|Exercise MCQs|147 Videos

Similar Questions

Explore conceptually related problems

A wire of length L carrying a current I is bent into a circle. The magnitude of the magnetic field at the centre of the circle is

The magnetic field at the centre of the current carrying coil

A wire of length l carries a steady current. It is bent first to form a circular plane loop of one turn. The magnetic field at the centre of the loop is B. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre caused by the same is

A wire of length l, carrying current i, is bent in circle of radius r, then magnetic moment at centre of loop is

When a current carrying wire is bent into a circular loop, magnetic field lines around it

The dipole moment of a circular loop carrying a current I, is m and the magnetic field at the centre of the loop is B_(1) . When the dipole moment is doubled by keeping the current constant, the magnetic field at the centre of the loop is B_(2) . The ratio (B_(1))/(B_(2)) is:

A circular loop of radius 9.7 cm carries a current 2.3A. Obtain the magnitude of the magnetic field:- centre of the loop .

A circular coil of radius 40 mm consists of 250 turns of wire in which the current is 20 mA. The magnetic field at the centre of the coil is

When a certain length of wire is turned into one circular loop, the magnetic induction at the centre of coil due to some current flowing is B_(1) If the same wire is turned into three loops to make a circular coil, the magnetic induction at the center of this coil for the same current will be

The electric current in a circular coil of two turns produced a magnetic induction of 0.2 T at its centre. The coil is unwound and then rewound into a circular coil of four turns. If same current flows in the coil, the magnetic induction at the centre of the coil now is

TARGET PUBLICATION-MAGNETIC EFFECT OF ELECTRIC CURRENT -Competitive Thinking Introduction

A current of 0.1 A circulates around a coil of 100 turns and having a ...
Text Solution
|
A circular loop of radius 'r' of conducting wire connected with a Volt...
Text Solution
|
A long wire carries a steady current . It is bent into a circle of one...
Text Solution
|
The dipole moment of a circular loop carrying a current I, is m and th...
Text Solution
|
Two concentric coils each of radius equal to 2 pi cm are placed at rig...
Text Solution
|
Magnetic field due to a ring having n turns at a distance x on its axi...
Text Solution
|
The magnetic field due to a current carrying circular loop of radius 3...
Text Solution
|
The magnetic induction at the centre of a current carrying circular co...
Text Solution
|
A circular coil of radius r carries a current I. The magnetic field at...
Text Solution
|
Magnetic fields at two points on the axis of a circular coil at a dist...
Text Solution
|
If a proton is projected in a direction perpendicular to a uniform mag...
Text Solution
|
A charged particle moving with velocity vis subjected to electric fiel...
Text Solution
|
A charged particle is moved along a magnetic field line. The magnetic ...
Text Solution
|
A particle of mass 'm' and charge 'q' is incident on XZ plane with vel...
Text Solution
|
A charged particle is released from rest in a region of steady and uni...
Text Solution
|
A positively charged particle projected towards east is deflected towa...
Text Solution
|
A loop of flexible conducting wire lies in a magnetic field of 2.0 T w...
Text Solution
|
If a particle of charge 10^(-12) coulomb moving along thehat(x)-direct...
Text Solution
|
A proton is moving perpendicular to a uniform magnetic field of 2.5 te...
Text Solution
|
A current of 5 ampere is flowing in a wire of length 1.5 metres. A for...
Text Solution
|