Question

constructions of Potentiometer​

Answer 1

Answer:

The potentiometer consists of a long resistive wire L made up of magnum or with constantan and a battery of known EMF V. This voltage is called as driver cell voltage. Connect the two ends of the resistive wire L to the battery terminals as shown below; let us assume this is a primary circuit arrangement. One terminal of another cell (whose EMF E is to be measured) is at one end of the primary circuit and another end of the cell terminal is connected to any point on the resistive wire through a galvanometer G. Now let us assume this arrangement is a secondary circuit.

Answer 2

Potentiometer and it's construction-

Explanation:

Resistors whose values ​​can be easily increased or subtracted are called potentiometers.

Resistors used for volume and tone control in radio receivers are potentiometers.

Construction -

Carbon film is placed on top of a circular bar which is about 4 times the size of a block.

An arm connected to an axle moves on this leaf in such a way that any resistance value between zero and maximum is obtained between the arm and one end of the leaf.

Potentiometers are mostly made of the carbon type, but for some special tasks (such as a control applied to the combination of E M F of a cell in a multimeter) a wire wound type potentiometer of low values ​​(eg from 1 to 100 ohms) is made in use.