Home
Class 12
PHYSICS
A non-ohmic resistor does not obey Ohm's...

A non-ohmic resistor does not obey Ohm's law. Can such non- ohmic resistors be of any use?

Text Solution

Verified by Experts

Actually many useful components in the electrical industry and in electronics are non-ohmic in nature. Diode, transistor, light emitting diodes (LED), thermistor are all non-ohmic resistors (conductors). With out the non-ohmic resistors (conductors) there would have been no progress in electrons.
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE (VERY ANSWER QUESTIONS) (Choose the correct alternative)|2 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise PROBLEMS (LEVEL-1)|15 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE (SHORT ANSWER QUESTIONS)|1 Videos

  • COMMUNICATION SYSTEMS

    AAKASH SERIES|Exercise PRACTICE EXERCISE (TV Antenna)|16 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE - III|73 Videos

Similar Questions

Explore conceptually related problems

Show that the semi conductor do not obey Ohm's Law.

Do all materials obey Ohm's law ?

(A): The semiconductors do not obey ohm's law. (R): In semi conductors, the resistance depends on magnitude and direction of applied electric field.

(A): Elastomers does not obey Hooke's law. (R): For elastomers, stress-strain curve is non linear.

Answer the following questions: (a) A steady current flows in a metallic conductor of non-uniform cross-section. Which of these quantities is constant along the conductor: current, current density electric field, drift speed ? (b) Is Ohm's law universally applicable for all cnducting elements ? If not, give examples of elements which do not obey Ohm's law. (c ) A low voltage suply from which one needs high currents must have very low internal resistance.Why (d) A high tension (HT) supply of say, 6kV must have a very large internal resistance, Why ?

(A): A resistor obeys ohm's law while a diode does not. (R): The expression that V = IR is a statement of Ohm's law is not true.

A 50V battery is connected across a 10 ohm resistor. The current is 4.5A is flowing through the resistor then the internal resistance of the battery is

Write two examples for ohmic and non-ohmic materials each.

When a battery connected across a resistor of 16Omega , the voltage across the resistor is 12 V. When the same battery is connected across the resistor of 10Omega voltage across it is 11 V. The internal resistance of the battery in ohm is

AAKASH SERIES-CURRENT ELECTRICITY-EXERCISE (VERY ANSWER QUESTIONS)
  1. When a conductor is heated due to the passage of current through it, t...

    Text Solution

    |

  2. V - i characteristics of dilute sulphuric acid with tungsten electrode...

    Text Solution

    |

  3. A non-ohmic resistor does not obey Ohm's law. Can such non- ohmic resi...

    Text Solution

    |

  4. A battery B of emf 1.5V and internal resistance r=5Omega is first conn...

    Text Solution

    |

  5. Out of the two Kirchhoffs laws which one explicitly shows that electro...

    Text Solution

    |

  6. With a metre bridge, you are advised to preferably obtain a balancing ...

    Text Solution

    |

  7. You are to compare two resistance that are in the ratio 1:2. The wire ...

    Text Solution

    |

  8. Define drift velocity of charge carriers in a conductor. Mention the u...

    Text Solution

    |

  9. Define mobility of charge carriers in a conductor. Mention the units o...

    Text Solution

    |

  10. A conductor has got different areas of cross sections. Are the current...

    Text Solution

    |

  11. Explain Ohm's law.

    Text Solution

    |

  12. What are ohmic and non ohmic devices? Give examples.

    Text Solution

    |

  13. Define ohm.

    Text Solution

    |

  14. What is conductance: Give its unit.

    Text Solution

    |

  15. On what factors does the resistance of a conductor depend?

    Text Solution

    |

  16. The manganin wire is used in the preparation of standard resistance. W...

    Text Solution

    |

  17. What is temperature coefficient of resistivity? What are its units?

    Text Solution

    |

  18. Is Ohm's law a fundamental law?

    Text Solution

    |

  19. What is an ideal cell?

    Text Solution

    |

  20. What is the terminal voltage of a cell ? When it will be equal to the ...

    Text Solution

    |