Question
Physics Question on Electric charges and fields
The intensity ratio of two waves is 1:9. The ratio of their amplitudes, is
A
(A) 3:1
B
(B) 1:3
C
(C) 1:9
D
(D) 9:1
Answer
(B) 1:3
Explanation
Solution
Explanation:
Intensity ∝ (amplitude) 2 ∴I1I2=a12a22⇒19=a12a22⇒a1a2=13⇒a1:a2=1:3Hence, the correct option is (B).