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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.
Q. What is meant by doping? The process of addition of extremely small amount of impurity into an intrinsic semiconductor is called doping.
DRAW A GRAPH OF DISTANCE VERSUS TAN
A quantity that can be calculated by instrument, clearly defined and has proper units is known as physical value. Physical quantities are described as fundamental and derived quant
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