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Q. Compare the emf and the potential difference. Comparison of emf and potential difference
1. The difference of potentials among the two terminals of a cell in an open circuit is called the electromotive force (emf) of a cell. The difference in potentials among any two points in a closed circuit is called potential difference.
2. The emf is independent of exterior resistance of the circuit whereas potential difference is proportional to the resistance between any two points.
Viscosity in fluids is the analog of friction in solids. Both are methods by which the kinetic energy of moving bodies can be changed into thermal power. In the absence of friction
metre; meter; m The basic SI unit of length, explained as the length of the path traveled through light in vacuum throughout a period of 1/299 792 458 s.
The refractive index of glass is 1.54. Determine the polarizing angle when light goes from glass to air medium?
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