Question

Rank the simple pendulums pictured below according to the frequencies of oscillation, greatest first.

• A. yellow, orange, blue
• B. blue, yellow, orange
• C. blue, orange, yellow
• D. orange, yellow, blue
• E. yellow, blue, orange

Answer 1

The correct option is A yellow, orange, blue

Frequency of oscillation of simple pendulum $f=\frac{1}{2\pi }\sqrt{\frac{g}{l}}$

$⟹$ $f\propto \frac{1}{\sqrt{l}}$ and is independent of mass of bob.

From figure, $l_{blue}>l_{orange}>l_{yellow}$

$⟹$ $f_{yellow}>f_{orange}>f_{blue}$