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Is it probable for the electric field to be non-zero at a point in space where the electric potential is zero? Ans: Regard as for instance the case of an electric potential
Explain Centripetal force?? Sir Isaac Newton suggested that motion in a straight line is most natural, and that deviations from this type of motion are caused by a force pullin
Physical interpretation of wave function : Einstein proposed a historic relationship between energy and mass using postulates of STR. The variation of mass with velocity has modif
Beats: The periodic vibrations in intensity or loudness of sound because of superposition of two sound waves of similar amplitude and slightly different frequencies are known a
Malus' law (E.L. Malus): The light intensity I of a ray along initial intensity I0 travelling by a polarizer at an angle theta among the polarization of the light ray & the po
A zinc plate is attached to the knob of a negatively charged electroscope. What will occur to the leaves of the electroscope when ultraviolet light is shown on the zinc plate
Q. The block of mass M descend with acceleration a and mass of string is m. find tension in string? Ans: The tension in the string will not be same at all points as the string h
A boy throws a ball of mass 20 kg vertically upwards.It raises to a maximum height of 100 m.At what height will the kinetic energy be reduced to 70%?
A bicycle is supported so that it is stopped from falling sideways but can move forwards or backwards; its pedals are in their highest and lowest positions. A student crouches
A boy goes to market with a average speed of 29 km/h.He returns back half the way he went with a average speed of 40 km/h.Find average speed for whole journey.
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