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

Ohmic devices are the devices that follow Ohm’s law. Examples: wire and resistor.

Non-Ohmic devices are devices that do not follow Ohm’s law. Examples: vacuum tubes and thermistors.


Related Questions

  1. Define: 1 volt, Potential difference
  2. What is the necessary condition for a conductor to obey Ohm's Law?
  3. A small bulb has a resistance of 2 ohms when it is cold. It draws 0.4-ampere current from a source of 4V and then starts glowing. Calculate the resistance when it is glowing
  4. What Is Effective Resistance?
  5. Why is the curve representing Ohm's law linear?
  6. Obtain the equation J = σE of Ohm's law on the basis of drift velocity
  7. State Ohms law. How can it be verified experimentally?
  8. Draw a circuit diagram to verify ohm’s law.
  9. State And Explain Joules Law Of Heating.
  10. State Ohms Law. Express It Mathematically. Define Si Unit Of Resistance.
  11. Obtain the equation of Ohm's law on the basis of drift velocity
  12. What Is The Basic Principle Of Ohm's Law?
  13. Is resistance constant in Ohm's law?
  14. Why Do We Use Ohm's Law?
  15. What are the applications of ohm's law used in daily life?

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CBSE CLASS XII Related Questions

  • 1.

    Find the ratio $\dfrac{\lambda_\alpha}{\lambda_p}$ of the de Broglie wavelength $\lambda_\alpha$ associated with an alpha particle to the de Broglie wavelength $\lambda_p$ associated with a proton if both are moving with the same velocity.


      • 2.
        A wire of length \(L\) is bent round into (i) a square coil having \(N\) turns and (ii) a circular coil having \(N\) turns. The coil in both cases is free to turn about a vertical axis coinciding with the plane of the coil, in a uniform, horizontal magnetic field and carry the same currents. Find the ratio of the maximum value of the torque acting on the square coil to that on the circular coil.


          • 3.
            Draw the plot of potential energy of a pair of nucleons as a function of their separation. Write two important conclusions that can be drawn from this plot.


              • 4.

                A magnet held vertically, with its north pole down, is dropped along the axis of a closed solenoid placed vertically on a table. If the observer looks down from the top,

                  • the induced current will flow in the anticlockwise direction.
                  • the induced current will flow in the clockwise direction.
                  • no induced current will flow in the solenoid.
                  • the magnet will fall with a constant velocity.

                • 5.

                  A parallel beam of monochromatic light falls normally on a single slit of width $a$ and a diffraction pattern is observed on a screen placed at distance $D$ from the slit. Explain:

                  (I) the formation of maxima and minima in the diffraction pattern, and

                  (II) why the maxima go on becoming weaker and weaker with its increasing number $n$.


                    • 6.
                      In a region, the electric potential varies as \(V = 10 - 50x\), where \(V\) is in volts and \(x\) is in meters. The electric field in the region is

                        • \(10\ \text{N/C}\) along \(+x\)
                        • \(10\ \text{N/C}\) along \(-x\)
                        • \(50\ \text{N/C}\) along \(+x\)
                        • \(50\ \text{N/C}\) along \(-x\)
                      CBSE CLASS XII Previous Year Papers

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