Anonymous
Anonymous asked in Science & MathematicsPhysics · 8 years ago

# In a moving coil instrument, the coil is suspended in a radial magnetic field...............................!!?

In a moving coil instrument, the coil is suspended in a radial magnetic field instead of a uniform magnetic field. this is done because of?

explain me the reason!

thank you!

Relevance

In a radial magnetic field, the angle between the conductor and the field will be always 90 degree.

Hence the angle through which the coil turns will be proportional to the current in the coil

In a uniform magnetic field the torque in the coil is not a constant even though the current remains the same. The angle through which the coil turns will be proportional to the product of the current and sin of the angle that the conductor makes with the field

• In a radial magnetic field, the angle between the conductor and the field will be always 90 degree.

Hence the angle through which the coil turns will be proportional to the current in the coil

In a uniform magnetic field the torque in the coil is not a constant even though the current remains the same. The angle through which the coil turns will be proportional to the product of the current and sin of the angle that the conductor makes with the field.

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• A coil experiences an induced current when the magnetic field passing through it varies. (a) When the magnet moves toward the coil the current is in one direction. (b) No current is induced while the magnet is held still. (c) When the magnet is pulled away from the coil the current is in the other direction. There is only an induced EMF if there is a changing flux change through the coil. Therefore, if it is always parallel to the field there would no induced emf.

• To maximise the flux through the coil.