Question

Four pendulums A, B, C and D are suspended from the
same
elastic support as shown in figure. A and C are of the same
length, while B is smaller than A and D is larger than A. If A
is given a transverse displacement,
(a) D will vibrate with maximum amplitude
(b) C will vibrate with maximum amplitude
(c) B will vibrate with maximum amplitude
(d) All the four will oscillate with equal amplitude

Answer 1

Answer:

Since length of pendulum A and C is same and

$t = 2\pi \sqrt{ \frac{l}{g} }$

, hence their time period is same and they will have same frequency of vibration. Due to it, a resonance will take place and the pendulum C will vibrate with maximum amplitude.

❤️

Answer 2

Explanation:

Four pendulums A, B, C and D are suspended from the

same

elastic support as shown in figure. A and C are of the same

length, while B is smaller than A and D is larger than A. If A

is given a transverse displacement,

(a) D will vibrate with maximum amplitude

(b) C will vibrate with maximum amplitude

(c) B will vibrate with maximum amplitude

(d) All the four will oscillate with equal amplitude

Option C