Question 30: Waves

Question

The displacement of a wave is given by
$$y = 20\cos (\omega t + 4z)$$
The amplitude of the given wave is

Accepted Answer

Given, $$y = 20\cos (\omega t + 4z)$$
On comparing if with general equation,
$$y = A\cos (kx+\omega t)$$
we get, $$A=20$$
Therefore, amplitude of the wave is 20.

Answer

$$10$$

Answer

$$20$$

Answer

$$20\sqrt2$$

Answer

$$10\sqrt2$$

Waves

The displacement of a wave is given by $y = 20\cos (\omega t + 4z)$ The amplitude of the given wave is

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