Review
An electric current passing through a conductor produces a magnetic field around it. This effect of electric current is called magnetic effect.
When a cell is not connected to a load, the potential difference between the poles of the cell is called its electro motive force (emf).
When a cell is not connected to a load, the potential difference between the poles of the cell is called its electro motive force (emf).
The S,I. unit of potential difference and ‘electro motive’ force is ‘volt’ and the device used to measure them is ‘voltmeter’.
 |
| Dry Cell |
 | |
| Voltmeter |
No comments:
Post a Comment