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Q. What are non-polar molecules? Give an example.
i) A non-polar molecule is one in that the centre of gravity of the positive charges coincides with the centre of gravity of the negative charges.
ii) Instance O2, N2, H2.
iii) The non-polar molecules don't have a permanent dipole moment.
Difference among sound and light waves: (i) For propagation of sound rays material phase is required but no material medium is needed for light waves. (ii)Sound rays are long
Which phrase would be incorrect to use: (1)A molecular of a compound (2)A molecule of an element (3)An atom of an element (4)None of these Ans: (2)A molecule of a
Explain about the number of modes in the optical fibres. Mode in the optical fibres: A mode is a path occupied by a ray of light through an optical fibre. This is a mathemat
why does our image in the mirror not appear upside down
What are the applications of laser transitions? Applications of laser transitions: a. High coherence of light is helpful for measuring length precisely by interferometry or
readings of deflection magnetometer
explain the refractive index of the transparent liquid using prism spectrometer?
.Define like and unlike parallel forces
Q. What is microwave oven? How it works? Microwave oven It is utilized to cook the food in a short time. When the oven is manage the microwaves are generated which in turn
A machine performs 8 Joules of work in 2 seconds. How much power is delivered by this machine? Ans: The power is delivered by this machine is 4 watts.
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