Class 11 Exam  >  Class 11 Videos  >  Internal Resistance of Cell, Electricity (Physics)

Internal Resistance of Cell, Electricity (Physics) Video Lecture - Class 11

FAQs on Internal Resistance of Cell, Electricity (Physics) Video Lecture - Class 11

1. What is internal resistance of a cell?
Ans. The internal resistance of a cell is the resistance within the cell itself, which opposes the flow of current. It is caused by the resistance of the electrolyte and the resistance of the cell components such as electrodes and terminals.
2. How does internal resistance affect the performance of a cell?
Ans. Internal resistance affects the performance of a cell by causing a voltage drop within the cell when current flows through it. This voltage drop reduces the terminal voltage of the cell, which is the voltage available to the external circuit. As a result, the cell's ability to deliver current and power to the external circuit decreases.
3. How can the internal resistance of a cell be measured?
Ans. The internal resistance of a cell can be measured by using a voltmeter and an ammeter. Firstly, the open circuit voltage (Voc) of the cell is measured using the voltmeter. Then, a known resistance (R) is connected in series with the cell and the current (I) passing through the circuit is measured using the ammeter. The internal resistance (r) of the cell can then be calculated using the formula r = (Voc - V)/I, where V is the voltage across the external resistance.
4. What factors can affect the internal resistance of a cell?
Ans. Several factors can affect the internal resistance of a cell. These include the type and concentration of the electrolyte used in the cell, the size and material of the electrodes, the temperature of the cell, and the age and condition of the cell. Higher electrolyte concentration, larger electrode size, and higher temperature generally result in lower internal resistance.
5. Can the internal resistance of a cell be reduced?
Ans. The internal resistance of a cell cannot be completely eliminated, but it can be reduced to some extent. Some ways to reduce internal resistance include using electrolytes with higher conductivity, optimizing the design and materials of the electrodes, and maintaining the cell at an optimal operating temperature. However, it is important to note that these measures may have limitations and trade-offs, and reducing internal resistance beyond a certain point may not be practically feasible.
Related Searches

Viva Questions

,

Objective type Questions

,

pdf

,

Electricity (Physics) Video Lecture - Class 11

,

Important questions

,

Summary

,

past year papers

,

study material

,

ppt

,

Internal Resistance of Cell

,

Internal Resistance of Cell

,

Extra Questions

,

mock tests for examination

,

Previous Year Questions with Solutions

,

Sample Paper

,

video lectures

,

Electricity (Physics) Video Lecture - Class 11

,

Exam

,

MCQs

,

Electricity (Physics) Video Lecture - Class 11

,

Free

,

shortcuts and tricks

,

Internal Resistance of Cell

,

practice quizzes

,

Semester Notes

;