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How Does One Understand this Motional Emf by Invoking the Lorentz Force Acting on the Free Charge Carriers of the Conductor? - Physics

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प्रश्न

How does one understand this motional emf by invoking the Lorentz force acting on the free charge carriers of the conductor? Explain.

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उत्तर

The magnetic force `(qvecvxxvecB)`component of the Lorentz force is responsible for motional electromotive force. When a conductor is moved through a magnetic field, the magnetic force tries to push the free electrons through the wire, and this creates the motional EMF.

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संबंधित प्रश्‍न

Derive the expression for force per unit length between two long straight parallel current carrying conductors. Hence define one ampere.


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(c) the magnitudes of the magnetic fields are equal
(d) the field at one point is opposite to that at the other point.


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Which of the following is true?

Five long wires A, B, C, D and E, each carrying current I are arranged to form edges of a pentagonal prism as shown in figure. Each carries current out of the plane of paper.

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Two long straight parallel conductors carrying currents I1 and I2 are separated by a distance d. If the currents are flowing in the same direction, show how the magnetic field produced by one exerts an attractive force on the other. Obtain the expression for this force and hence define 1 ampere.


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