Dec 13 2010

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Difference between emf and pd

ananthesh asked:

“can you please explain about emf and PD of a cell?”


EMF stands for electromotive force.

EMF of a cell is equal to the potential difference between the two terminals of a cell when no current is drawn from it.

Pd (potential difference) between any two points on a circuit is defined as the work done per unit charge in carrying a positive test charge from one point to the other. With reference to a cell, the potential difference between the terminals of a cell when a current is drawn from it is called terminal voltage.

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  1. kiran says:

    can you explain the function of resistor in LCR and RC circuit. why time constant is taken only at o.36q in decay and 0.64 in growth of charge