Echoes and Vibrations of Sound — Physics STD 10 — Question

If the amplitude of a wave is doubled, what will be the effect on its loudness?

Explain the statement ‘the potential difference between two points is 1 volt’.

Which material is the calorimeter commonly made of? Give one reason for using this material.

A lens always forms an image between the object and the lens.
name the lens.

Why is the colour red used as a sign of danger?

Give the range of wavelength of the electromagnetic waves visible to us.

State the condition for the following a lens has both its focal lengths equal .

How does the deviation produced by a prism depend on the refraction index of its material

What is the P.E. of a body lying on the surface of the earth?

Write an expression for the electrical energy spent in flow of current through an electrical appliance in terms of current, resistance and time.