A paper capacitor is usually available in the form of:
When you rub a plastic rod against your hair several times
and put it near some bits of paper, the pieces of papers are attracted towards
it. What does this observation indicate:
An object is 14 cm in front of a convex mirror. The image is
5.8 cm behind the mirror. What is the focal length of the mirror:
If a ray of light in glass is incident on an air surface at
an angle greater than the critical angle, the ray will: