Safe level of noise depends on factors:

SI unit of electric potential is:

If we double the distance between two charges, then force becomes

The technique or method used to absorb undesirable sounds by soft and porous surface is called:

Coulomb’s law is mathematically stated as:

NOT gate is also called:

The critical angle for a beam of light passing from water into air is 48.8 degrees. This mean that all light rays with an angle of incidence greater than this angle will be:

Which instrument measures the potential difference:

The S.I unit of electric current is:

Half of radius of curvature is called:

What happens to the intensity of the brightness of the lamps connected in series as more and more lamps are added?

That period in which voltage repeats its value in equal intervals is called: