Internal resistance of a cell, combination of cells
Draw the V–I graph of a cell with internal resistance (slope −r), find maximum power at R = r, and compare cells in series, parallel and mixed grouping.
About this experiment
| Subject | Physics |
|---|---|
| Class | 12 |
| Chapter | 3. Current Electricity |
| NCERT section | 3.9, 3.10 |
| Level | NCERT level |
| Time | about 12 minutes |
| Access | Included in a PractiSci plan |
What you do in the lab
Change the controls and watch the physics behave in real time in 3D. Live readouts and graphs show the numbers behind it, and the Learn tab has the theory, procedure, observations and viva questions. Works on a phone or a laptop, in English and Hindi.
Topics: internal resistance · terminal voltage · cells in series · cells in parallel · maximum power transfer
More from this chapter
- Drift velocity of electrons in a conductor
- Galvanometer: resistance and figure of merit (half-deflection)
- Kirchhoff's laws on circuits
- Metre bridge and Wheatstone bridge
- Ohm's law: V–I characteristics
- Potentiometer: emf comparison, internal resistance
- Resistivity and temperature dependence of a wire
- Resistor colour code and series/parallel combinations