Questions

_________ is a natural electrical phenomenon characterized by the appearance of streamers of reddish or greenish light in the sky, especially near the northern or southern magnetic pole.

The work done by centripetal force is ______.

Calculate the frequency (in Hz) of a sound wave of wavelength 5 m travelling with a speed of 360 m/s.

Due to an acceleration of 4 m/s2 the velocity of a body increases from 10 m/s to 30 m/s in a certain period. Find the displacement (in m) of the body in that period.

Through which does light travel best?

If the resistance of a conductor is reduced to half its initial value, then the heating effect in the conductor will become ___.

In Microsoft Word, _____ is a position we set for placing and aligning text on a page.

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.

to have as belonging to one; own.