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प्रश्न
State Biot-Savart’s law.
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उत्तर
The magnitude of magnetic field d`vec"B"` at a point P at a distance r from the small elemental length taken on a conductor carrying current varies-
- directly as the strength of the current I
- directly as the magnitude of the length element `vec"dl"`
- directly as the sine of the angle (say,θ) between `vec"dl"` and `hat"r"`.
- inversely as the square of the distance between the point P and length element `vec"dl"`. This is expressed as `"dB" prop ("Id"l)/"r"^2` sin θ
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संबंधित प्रश्न
How is a galvanometer converted into
- an ammeter and
- a voltmeter?
Obtain a relation for the magnetic induction at a point along the axis of a circular coil carrying current.
What is tangent law? Discuss in detail.
Discuss the conversion of galvanometer into an ammeter and also a voltmeter.
A tightly wound 100 turns coil of radius 10 cm carries a current of 7 A. The magnitude of the magnetic field at the centre of the coil is ______.
(Take permeability of free space as 4π × 10−7 SI unit).
To apply the Biot–Savart law to a wire XY carrying current I, the wire is broken into extremely small pieces called:
Which set of proportionalities correctly describes how the magnitude dB of the magnetic field contribution depends on the current I, the element length dl, the angle θ, and the distance r?
In the comparison between Coulomb's law (electric field) and the Biot–Savart law (magnetic field), the source of the field is:
Which distance dependence do the electric field (Coulomb's law) and the magnetic field (Biot–Savart law) share?
Which relationship correctly links the permeability of free space, the permittivity of free space, and the speed of light?
