A thin ring of radius R metre has charge q column uniformly spread on it. The ring rotates about its axis with a constant frequency of f revolution/s. The value of magnetic induction in Wb m^-2 at the centre of the ring is

μ_oq f/ 2π R

μ_oq / f 2π R

μ_oq / 2 f R

μ_oq f / 2 R

Solution

μ_oq f / 2 R

The magentic field at the centre of the circle
= $fraction numerator straight mu subscript straight o over denominator 4 straight pi end fraction space straight x space fraction numerator 2 πi over denominator straight R end fraction space equals space straight mu subscript straight o over 2 fraction numerator left parenthesis straight q right parenthesis over denominator Rt end fraction$

Some More Questions From Magnetism and Matter Chapter

Answer the following question:
The earth may have even reversed the direction of its field several times during its history of 4 to 5 billion years. How can geologists know about the earth's field in such distant past?

Answer the following question:
The earth’s field departs from its dipole shape substantially at large distances (greater than about 30,000 km). What agencies may be responsible for this distortion?

A bar magnet of magnetic moment 1.5 JT^–1 lies aligned with the direction of a uniform magnetic field of 0.22 T.
(a) What is the amount of work required by an external torque to turn the magnet so as to align its magnetic moment: (i) normal to the field direction, (ii) opposite to the field direction?
(b) What is the torque on the magnet in cases (i) and (ii)?

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Magnetism And Matter

A thin ring of radius R metre has charge q column uniformly spread on it. The ring rotates about its axis with a constant frequency of f revolution/s. The value of magnetic induction in Wb m^-2 at the centre of the ring is

μ_oq f/ 2π R

μ_oq / f 2π R

μ_oq / 2 f R

μ_oq f / 2 R

Some More Questions From Magnetism and Matter Chapter

Answer the following question:
The earth may have even reversed the direction of its field several times during its history of 4 to 5 billion years. How can geologists know about the earth's field in such distant past?

Answer the following question:
The earth’s field departs from its dipole shape substantially at large distances (greater than about 30,000 km). What agencies may be responsible for this distortion?

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Magnetism And Matter

A thin ring of radius R metre has charge q column uniformly spread on it. The ring rotates about its axis with a constant frequency of f revolution/s. The value of magnetic induction in Wb m-2 at the centre of the ring is μoq f/ 2π R μoq / f 2π R μoq / 2 f R μoq f / 2 R

Some More Questions From Magnetism and Matter Chapter

Answer the following question:The earth may have even reversed the direction of its field several times during its history of 4 to 5 billion years. How can geologists know about the earth's field in such distant past?

Answer the following question:The earth’s field departs from its dipole shape substantially at large distances (greater than about 30,000 km). What agencies may be responsible for this distortion?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

A thin ring of radius R metre has charge q column uniformly spread on it. The ring rotates about its axis with a constant frequency of f revolution/s. The value of magnetic induction in Wb m^-2 at the centre of the ring is

μ_oq f/ 2π R

μ_oq / f 2π R

μ_oq / 2 f R

μ_oq f / 2 R

Answer the following question:
The earth may have even reversed the direction of its field several times during its history of 4 to 5 billion years. How can geologists know about the earth's field in such distant past?

Answer the following question:
The earth’s field departs from its dipole shape substantially at large distances (greater than about 30,000 km). What agencies may be responsible for this distortion?