Advertisements
Advertisements
प्रश्न
Give two differences between an ohmic and non-ohmic resistor.
Write three differences between ohmic and non-ohmic resistors.
अंतर स्पष्ट करें
Advertisements
उत्तर
| Ohmic resistor | Non-ohmic resistor | |
| 1. | `V/I` remains constant regardless of the value of V or I, as it follows Ohm's law. | `V/I` is not constant and does not remain the same for all values of V or I since it does not follow Ohm's law. |
| 2. | A straight line represents the relationship between current I and projected V. | A straight line does not appear on the graph that plots current I against potential difference. |
| 3. | The resistance remains constant and does not change with the variation in voltage or current. | The resistance changes with the variation in voltage or current (shows dynamic resistance). |
| 4. | Pure metallic conductors like copper, silver, and aluminium at a constant temperature. | Electronic devices like junction diodes, transistors, filament lamps, and LEDs. |
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
संबंधित प्रश्न
The music system draws a current of 400 mA when connected to a 12 V battery.
- What is the resistance of the music system?
- The music system if left playing for several hours and finally the battery voltage drops and the music system stops playing when the current drops to 320 mA. At what battery voltage does the music system stop playing?
What are non-ohmic reistors? Give one example and draw a graph to show its current-voltage relationship.
The following figure shows the I-V characteristic curves for two resistors. Identify the ohmic and non-ohmic resistors. Give a reason for your answer.
 |
 |
| (a) | (b) |
Write the expressions for the equivalent resistance R of three resistors R1, R2 and R3 joined in
- parallel
- series
