Sound — Physics STD 10 — Question

The potential energy of a body is the energy by virtue of its ________ .

Complete the following sentence:
When ice melts, its volume _________

Temperature ............ When ice melts at 0°C.

Fill in the blanks by writing (i) Only soft iron, (ii) Only steel, (iii) Both soft-iron and steel for the material of core and/or magnet.
Electric bell ______.

The refractive index of glass with respect to air is 3/2. The refractive index of air with respect to glass will be ________ .

If the amplitude of a sound is halved, its loudness becomes ………………

A wire stretched between two fixed supports is placked exactly in the middle and then relesed. It executes ___________ [forced / damped / natural] vibrations.

A _________ [motor/generator/convertor] is used in a fan where electrical energy converted to mechanical kinetic rotational energy.

The _________ [systematic/ series/ parallel] wiring system in houses is preferred.

critical angle is the angle of ________ In denser medium for which the angle of ________ in rarer medium is ________