Question

In electro-mechanical conversion devices (e.g. motors and generators), a small air gap is left between the rotor and stator in
order to ...,
complete the magnetic path
(B) decrease the reluctance of magnetic path
permit mechanical clearance
(D) increase flux density in air gap
None of the above​

Answer 1

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$\Large\bold{\underline{\purple{Question}}}$

In electromechanical energy conversion devices(e.g. generators and motors),a small air gap is left between the stator and the rotor ignored to

a) reduce the reluctance of the magnetic path.

b) increase fiux density in the air gap.

c) permit mechanical clearance.

d) avoid saturation of field.

$\Large\bold{\underline{\purple{Answer} }}$ $\small\bold\blue{(c) permit\:mechanical\:clearance.}$

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Answer 2

Answer:

In electro-mechanical conversion devices (e.g. motors and generators), a small air gap is left between the rotor and stator in order to permit mechanical clearance.

Explanation:

A device that converts electrical energy into mechanical energy or mechanical energy into electrical energy is known as an electromechanical energy conversion device. The electromechanical energy conversion takes place through the medium of a magnetic field.

The magnetic field is used as a coupling medium between electrical and mechanical systems. It is because the energy storing capacity of a magnetic field is very high. Therefore, an electromechanical energy converter has three main parts −

• Mechanical system

• Coupling medium

• Electrical system

The electromechanical energy converters are of two types −

• Gross-motion devices − Such as electrical motors or generators.

• Incremental motion devices − Such as microphones, loudspeakers, electromagnetic relays and electrical measuring instruments, etc.

SPJ2