NEET Questions

A sound wave travels through air with a frequency of 500 Hz. If the air temperature increases, keeping other factors constant, the velocity of the sound wave will:

At what temperature is the speed of sound in air approximately twice its speed at 0°C?

The speed of sound in air at 0°C is 330 m/s. Approximately what will be the speed of sound at 20°C?

Ferromagnetic substances show a sharp decrease in magnetic susceptibility above a certain temperature known as:

A faulty thermometer reads the melting point of ice as $-10^\circ C$ and the boiling point of water as $110^\circ C$. What will be the temperature reading on this faulty thermometer when the actual temperature is $60^\circ C$?

Which of the following temperature scales has the smallest degree interval?

A faulty thermometer reads the melting point of ice as $-10^\circ C$ and the boiling point of water as $110^\circ C$. What will be the correct temperature if this faulty thermometer reads $50^\circ C$?

Which of the following properties of a thermometric substance is NOT essential for practical thermometry?

Two thermometers, one based on the expansion of mercury and another on the resistance of platinum, are calibrated at the ice point and steam point. Which is more likely to agree with a constant-volume gas thermometer at intermediate temperatures?

A Celsius thermometer and a Fahrenheit thermometer are placed in the same environment. If the Celsius thermometer reads $25^\circ C$, what is the approximate reading on the Fahrenheit thermometer?