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  4. In a wave motion y = a sin (kx-ω t), y can represent

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Q. In a wave motion $y = a\sin (kx-\omega t),$ y can represent

IIT JEEIIT JEE 1999Waves

Solution:

In case of sound wave, y can represent pressure and displacement, while in case of an electromagnetic wave it represents electric and magnetic fields.
NOTE In general,y is any general physical quantity which is made to oscillate at one place and these oscillations are propagated to other places also.