If the amplitude of a wave is doubled, then its intensity is:
Correct answer: C. Quadrupled
- A. Doubled
- B. Halved
- C. Quadrupled
- D. One fourth
Explanation
(a) If the amplitude of a wave is doubled, its intensity is not doubled. The correct answer is not (a). (b) If the amplitude of a wave is halved, its intensity is not halved either. The correct answer is not (b). (c) If the amplitude of a wave is doubled, its intensity is quadrupled. This means that the intensity increases by a factor of four. So, option (c) is the correct one. (d) If the amplitude of a wave is one-fourth of its original value, the intensity is not one-fourth. The correct answer is not (d). Intensity (I) is given by the formula: I = (A^2) * P Where: - I is the intensity of the wave - A is the amplitude of the wave - P is the power of the wave This formula shows that intensity is directly proportional to the square of the amplitude. So, if the amplitude is doubled, the intensity will be quadrupled.
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