Analyse the statements given — task. Physics CBSE Live product, Class 9 (2026-27).

Analyse the given statements:

1. A student hears two sounds:
\(Sound\ X\: frequency\ =\ 800\ Hz\), small amplitude
\(Sound\ Y\: frequency\ =\ 200\ Hz\), large amplitude
The student says, “Sound X must be louder because its frequency is higher, while Sound Y must be higher-pitched because its amplitude is larger.”
Which statement correctly evaluates the student's reasoning?

Pitch and loudness are determined only by the speed of sound.
X is higher-pitched because it has greater frequency, while Y is louder because it has greater amplitude.
X is louder because higher frequency always produces greater loudness, while Y is higher-pitched because it has greater amplitude.
Both statements are correct because frequency and amplitude increase together.

2. A student hears a sudden clap and immediately turns toward the source. The teacher explains that having two ears helps the brain determine the direction of the sound.
Which mechanism best explains this ability?

The brain compares the very small difference in the time at which the sound reaches the two ears.
One ear converts sound into light while the other converts it into electrical energy.
Both ears always receive the sound at exactly the same time, so the brain identifies the louder ear.
The brain increases the amplitude of the sound in the nearer ear.

Previous task

Exit to the topic

Next task

Send feedback

Did you find an error?

Send it to us!

8. Analyse the statements given

Question: