each mounted so that they A hemisphere of radius a and a piston of radius a are ta vibrating with the same on of radius a radiate on one of an infinite They are maximum speed amplitude U。 and at the same frequency so that ka < 1. (a) For a distance such that r > a, what is the ratio of the axial intensity of the piston to that of the hemisphere? (b) What is the ratio of the total power radiated by the hemisphere to that radiated by the piston?

each mounted so that they A hemisphere of radius a and a piston of radius a are ta vibrating with the same on of radius a radiate on one of an infinite They are maximum speed amplitude U。 and at the same frequency so that ka < 1. (a) For a distance such that r > a, what is the ratio of the axial intensity of the piston to that of the hemisphere? (b) What is the ratio of the total power radiated by the hemisphere to that radiated by the piston?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Free undamped vibrations

Whenever an object/system displaces in either side of its equilibrium position with the help of an external/internal means, then the object/system moves regularly or randomly on both sides of its equilibrium position. This motion is called vibration. Generally, there are three types of vibration: longitudinal vibration, transverse vibration, and torsional vibration.

Question

a and a piston of radius a are each mo
of radius a are each mounted so that they
They are vibrating with the same
A hemisphere of radius a and a
one side o
radiate on one
of an
maximum speed amplitude U。 and at the same frequency so that ka < 1. (a) For a
distance such that r > a, what is the ratio of the axial intensity of the piston to that of
the hemisphere? (b) What is the ratio of the total power radiated by the hemisphere
to that radiated by the piston?

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