| ⇦ | 
| ⇨ |
The periodic waves of intensities I₁ and I₂ pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is:
Options
(a) I₁ + I₂
(b) (√I₁ + √I₂)²
(c) (√I₁ – √I₂)²
(d) 2 (I₁ + I₂)
Correct Answer:
2 (I₁ + I₂)
Explanation:
The resultant intensity of two periodic waves at a point is given by
I = I₁ + I₂ + 2 √I₁I₂ . cos ?.
Resultant intensity is max. if cos ? = -1
i.e Iₘₐₓ = I₁ + I₂ + 2 √I₁I₂
Resultant intensity is min. if cos ? = +1
i.e, Iₘᵢₙ = I₁ + I₂ – 2 √I₁I₂
Therefore, the sum of the max. and min. intensities is Iₘₐₓ + Iₘᵢₙ
= I₁ + I₂ + 2 √I₁I₂ + I₁ + I₂ – 2 √I₁I₂
= 2 (I₁ + I₂)
Related Questions: - The energy band gap is maximum in
- If fundamental frequency of closed pipe is 50 Hz then frequency of 2nd overtone
- In common base circuit of a transistor, current amplification factor is 0.95.
- Equal charge q each are placed at the vertices AQ and B of an equilateral triangle
- The ratio of volumes of nuclei (assumed to be in spherical shape) with respective
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The energy band gap is maximum in
- If fundamental frequency of closed pipe is 50 Hz then frequency of 2nd overtone
- In common base circuit of a transistor, current amplification factor is 0.95.
- Equal charge q each are placed at the vertices AQ and B of an equilateral triangle
- The ratio of volumes of nuclei (assumed to be in spherical shape) with respective
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply