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(a) Draw a labelled diagram of an ac generator. Obtain the expression for the emf induced in the rotating coil of N turns each of cross-sectional area A, in the presence of magnetic field → B . (b) A horizontal conducting rod 10 m long extending from east to west is falling with a speed 5.0 m s − 1 at right angles to the horizontal component of the Earth's magnetic field, 0.3 × 10 − 4 W ...
(a) State the principle of an ac generator and explain its working with the help of a labelled diagram. Obtain the expression for the emf induced in a coil having N turns each of cross-sectional area A, rotating with a constant angular speed ' ω ' in a magnetic field → B, directed perpendicular to the axis of rotation. (b) An aeroplane is flying horizontally from west to east with a ...
State the principle of an ac generator and explain its working with the help of a labelled diagram. Obtain the expression for the emf induced in a coil. having N turns each of cross-sectional area A, rotating with a constant angular speed 'ω' in a magnetic field `vecB` directed perpendicular to the axis of rotation.
16 de may. de 2024 · Hint :Moving coil galvanometer is known as a device that can be used basically to measure or detect small electric current..Here, we discuss the principle and construction of the moving coil galvanometer. A radial magnetic field that is produced by cylindrical poles of permanent magnet of galvanometer is always parallel to the plane of the coil.
Moving coil galvanometers are of two types. (a) Suspended coll. (b) Pivoted coil type or tangent galvanometer, Its working is based on the fact that when a current carrying coil is placed in a magnetic field, it experiences a torque. This torque tends to rotate the coil about its axis of suspension in such a way that the magnetic flux passing ...
5 de oct. de 2018 · It works on the principle of electromagnetic induction, i.e. when a coil continuously rotates in a magnetic field, the magnetic flux associated with it keeps on changing; thus an emf is induced in it. (ii) When the coil rotates in a magnetic field, its effective area, i.e. A cos θ, (i.e. area normal to the magnetic field) keeps on changing.
The angle through which the coil is deflected due to the effect of the magnetic torque is proportional to the magnitude of current in the coil. Moving Coil Galvanometer Construction and Diagram The moving coil galvanometer is made up of a rectangular coil that has many turns, and it is usually made of thinly insulated or fine copper wire that is wounded on a metallic frame.
