Question

what is electromotive force ?
what is the unit? ​

Answer 1

Despite its name, electromotive force is not actually a force. It is commonly measured in units of volts, equivalent in the metre–kilogram–second system to one joule per coulomb of electric charge.

Answer 2

$\huge \mathfrak{Answer:-}$

Electrochemical cells are of two types: 'electrolytic cell' and 'galvanic cell'. The electrical energy is absorbed producing thereby chemical reactions. This process can also be reversed in the chemical energy is converted to electrical energy. Any device which accomplishes is called a galvanic cell or voltaic cell.

Electrolytic cell electrons are fed into the cell from the external circuit. The cathode receive the electron and become the negative electrons and the anode becomes the positive electrons. A galvanic cell, oxidation occur at the anode; the electron so released by the anode are send to the external circuit. The anode is regarded as the negative electrode and the cathode, where reduction occurs, thus becomes the positive electrode.

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