A neutral point is obtained at the centre of a vertical circular current carrying coil. The angle between the plane of the coil and the magnetic meridian is

0^{\circ}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

45^{\circ}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

60^{\circ}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

90^{\circ}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D $90^{\circ}$
The magnetic meridian is along $N - S$ plane, and the earth's magnetic field ${\to B}_{H}$ lies along it.

To obtain neutral point at the centre of coil, magnetic field due to current in the coil $\to B$ and ${\to B}_{H}$ must cancel each other.

Hence, plane of the coil and magnetic meridian must be perpendicular to each other as shown below.

Hence option $(D)$ is the correct answer.

Suggest Corrections

Similar questions

Q. A neutral point is obtained at the centre of a vertical circular coil carrying current. The angle between the plane of the coil and the magnetic meridian is

Q. A vertical circular coil of radius

0.1 m

and having

10

turns carries a steady current. When the plane of the coil is normal to the magnetic meridian, a neutral point is observed at the centre of the coil. If

B_{H} = 0.314 \times 10^{- 4} T

, the current in the coil is :

Q. A compass needle is free to turn in a horizontal plane is placed at the centre of a circular coil of

30

turns and radius

12 cm

. The coil is in a vertical plane, making an angle of

45^{\circ}

with the magnetic meridian. When the current in the coil is

0.35 A

, the needle points west to east. Find the horizontal component of the earth's magnetic field at the location.

Q. A circular coil of radius

2 R

is carrying current

i

.The ratio of magnetic fields at the centre of the coil and at a point at a distance

6 R

from the centre of the coil on the axis of the coil is :

A compass needle free to turn in a horizontal plane is placed at the centre of circular coil of 30 turns and radius 12 cm. The coil is in a vertical plane making an angle of 45º with the magnetic meridian. When the current in the coil is 0.35 A, the needle points west to east.

(a) Determine the horizontal component of the earth’s magnetic field at the location.

(b) The current in the coil is reversed, and the coil is rotated about its vertical axis by an angle of 90º in the anticlockwise sense looking from above. Predict the direction of the needle. Take the magnetic declination at the places to be zero.

Join BYJU'S Learning Program