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Two point changes q1 and q2 are placed at a distance r from one another then electrostatic potential energy of two phase charge system will be kq1q2/r . We take P.E. of two charge system to be zero when they are placed at infinity.
Ohm's law (G. Ohm; 1827): The ratio of the potential difference among the ends of a conductor to the current passing through it is constant; the constant of proportionality is
Two waves of equal frequency have amplitudes 2 units and 3 units respectively. When they superpose coherently the intensity of the resultant wave is I 1 . The intens
how Michelson interferometer can be used to measure the wavelength of sodium light.
Moment of Inertia of Rigid Bodies : For a continuous mass distribution like found in a hard object, we remove the summation of Eq. (ii) by an integral. If the object is separated i
The temperature of a body is measured indirectly by making use of the fact that certain physical property of a substance changes linearly with the temperature If the value of th
Q. The half life period of 84Po218 is 3 minutes. What percentage of the sample has decayed in 15 minutes? 1 HLP = 3 minutes In 15 minutes, there are 3 HLPs The remaining
Light with a wavelength of 454.5 nm passes by two slits that are 95.2 cm from a screen. The distance among the centers of the central band and the first-order band is 15.2 mm.
What are eddy currents? State how their effect is decreased in transformers. (b) Verify the ef?ciency of a 15 kVA transformer for the following conditions: (i) full load, un
Distinguish between absolute permeability and relative permeability of a medium Absolute Permeability: 1. Absolute permeability is the ability of the medium to allow th
is the potential in the cavity of a charged conductor zero
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