How do you find the internal resistance of a cell using potentiometer?

Below is the Circuit Diagram for the Potentiometer:

1. Where the internal resistance of the cell can be determined by the following formula:
2. r = (L1 – L2)/(L2) * R.
3. Here,
4. L1 = a balancing length without a shunt resistance.
5. L2 = a balancing length with a shunt resistance.

How you will determine the internal resistance of a cell by using a potentiometer derive the necessary formula?

∴R=VE−V​R.

E=(VAB​/L)l.

Now, r=VE−V​R.

∴r=R(l1​l​)

How do you find the internal resistance of a cell?

The relationship between internal resistance (r) and emf (e) of cell s given by. Where, e = EMF i.e. electromotive force (Volts), I = current (A), R = Load resistance, and r is the internal resistance of cell measured in ohms….Internal Resistance Formula.

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How do you find the resistance of a potentiometer?

The best way to determine the type, or law of a particular potentiometer is to set the pots shaft to the center of its travel, that is about half way, and then measure the resistance across each half from wiper to end terminal. If each half has more or less equal resistance, then it’s a Linear Potentiometer.

How do you find the internal resistance of a cell using potentiometer Class 12?

Take maximum current from battery , making rheostat resistance small. Insert the plug key k , and adjust the rheostat so that a null point is obtained on the fourth wire of the potentiometer . Insert the 2000 ohm plug in its position in resistance box and obtain a null point by slightly adjusting the jockey .

On what factors does the internal resistance of a cell depends?

Thus, the internal resistance of a cell depends on the factors like distance between the electrodes, the temperature, the effective area of the electrodes and the concentration of the solution.

How can emf of two cells be compared using potentiometer?

Using a potentiometer, we can determine the emf of a cell by obtaining the balancing length l. Here, the fall of potential along the length l of the potentiometer wire is equal to the emf of the cell, as no current is being drawn from the cell. Then, or, ; where k is the potential gradient along the wire.

What does the internal resistance of a cell mean answer?

Internal Resistance: The resistance offered by the electrolyte inside the cell to the flow of electric current through it is called the internal resistance of the cell.

Does internal resistance of cell depends on the current drawn from the cell Brainly?

Internal resistance of a cell doesnt depend on the current drawn from it. No. Internal resistance of a cell doesnt depend on the current drawn from it.

How does the internal resistance change if we increase the area of electrodes?

The internal resistance of the cell is inversionally proportional to the area of the electrodes, i.e. if area is increased, internal resistance will decrease.

How to measure the internal resistance of a given primary cell?

To measure the internal resistance of a given primary cell using potentiometer. Potentiometer is a device used to measure the internal resistance of a cell, to compare the e.m.f. of two cells and potential difference across a resistor. It consists of a long wire of uniform cross sectional area and of 10 m in length.

What is the aim of a potentiometer?

Aim : To determine the internal resistance of a given primary cell using cell using potentiometer .

What is the internal resistance of an electrolyte?

When current is drawn from a cell, there is a movement (flow) of ions in the electrolyte between the electrodes of the cell. Resistance offered by the electrolyte to the flow of ions in it is called the internal resistance of the cell and is denoted by r.

What is the relation between potential difference EMF and internal resistance?

The relation between potential difference, emf, and internal resistance of a cell is given by This indicates the value of V is less than E by an amount equal to the fall of potential inside the cell due to its internal resistance. Where l1 and l2 are balancing lengths without shunt or with the shunt.