Question

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1. What is the EMF of a cell?? How is it denoted ??

2. What is Terminal potential difference?? How is it denoted??

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Answer 1

The e. m. f or the electromotive force of a cell is defined as the energy spent of the work done per unit charge in taking a positive test charge around the complete circuit of the cell i.e in the circuit outside the cell as well as in the electrolyte inside the cell.

•SI unit: volt(V)

The terminal voltage{ the terminal potential difference or terminal electric potential}[V] of a cell is defined as the work done per unit charge in carrying a positive test charge around the circuit connected across the terminals of the cell...

•SI unit: volt(V)

Answer 2

Your answer :

1) Electromotive Force (EMF) The electromotive force (EMF) is the maximum potential difference between two electrodes of a galvanic or voltaic cell. This quantity is related to the tendency for an element, a compound or an ion to acquire (i.e. gain) or release (lose) electrons.

2) Terminal voltage is the voltage output of a device is measured across its terminals. Terminal voltage is calculated by V = emf - Ir. ... This is Potential difference between two points and now when we insert any plug in this of mobile charger or any other appliance, the current flows due to potential difference.

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