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Q. Give any three properties of electric lines of force.
Properties of lines of forces: (i) Lines of force begin from positive charge and terminate at negative charge. (ii) Lines of force certainly not intersect. (iii) The departure to a line of force at any point gives the direction of the electric field (E) at that point.
Q. What are polar molecules? Give an example. i) A polar molecule is one in that the centre of gravity of the positive charges is separated from the centre of gravity of the ne
A guitar string produces 4 beats/second when sounded with a250Hz tuning fork and 9 beats/second when sounded with a 255 Hz tuning fork. What is the vibration frequency?
Explain the Transmission of Heat Transmission of heat (movement of heat from the hotter item to the colder item) can be brought about three ways: by conduction, convection, and
Using a lever Determine that the longer end of a lever travels farther and faster than the shorter end when the fulcrum is not in the centre. A baseball or cricket bat makes us
With a neat and clean diagram illustrate in brief the TIR. Describe critical angle and mention the two conditions for TIR.
for assignment
The line density of charge in a wire is 0.20 Cm-1. If this wire is symmetrically enclosed along its length by a cylindrical surface of radius 1.0 m and length 1.5 m, calculate
What is electricity
a) Here temperature difference of junction is used to produce thermo e.m.f. and vice-versa. b) This effect produced when junctions of a thermocouple are kept at dissimilar tempe
Poisson equation (S.D. Poisson) It is the differential form of Gauss' law, such as, div E = rho,
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