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SI unit of luminous intensity is ____.
One astronomical unit is the average distance between:
Gamma rays are ______.
A ‘rectifier’ is an electronic device used to convert ______.
Radio waves, microwaves, infra-red spectrum, ultraviolet rays, X-rays and gamma rays are classified as____.
What kind of energy is stored in a dry cell?
Which of the following physical quantities have the same dimensions?
In a transistor, the base is _____.
The technique used by bats to find their way or to locate food is _______.
What frequency range of E.M waves are used for commercial FM radio?
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