(convex mirror, principal focus) A spherical mirror which is polished from hollow side, such that the reflecting surface is towards the outer side is called _____________.

(convex mirror, principal focus) A spherical mirror which is poli…

Loudness of a sound $.........$ with increase in the distance between the listener and the source.

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(rubbing, excess)
An uncharged insulator can be charged by _______________ with another suitable body.

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(sonar, amplitude)
The device used to measure the depth of sea is called _____________.

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(diverge, induction)
When a negatively charged body is placed in contact with the negatively charged disc of G.L.E. its leaves _______________.

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Drum produces sound due to vibration of its $.........$

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(attract, bound)
The electrons revolving close to the nucleus of an atom are called _______________ electrons.

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(potential, increasing)
The kinetic energy possessed by a body increases by _____________ its speed.

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The phenomenon of splitting of white light into its seven constituent colours after passing through a prism is called $.........$

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(electric, kinetic)
In hydroelectric dams the _____________ energy of flowing water is transformed into electric energy.

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(source, sink)
Battery is a small _______________ of electricity.

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