Why Do We Use Ohm's Law?

Ohm’s law is an important law in electric circuits which represents the relationship between voltage, current, and resistance.

  • Ohm’s law can be used to control the amount of current that flows through a circuit by adding resistors in order to reduce the current flow or by removing the resistors to increase the flow of current.
  • Ohm’s law is useful in the analysis of the circuits, especially when it was combined with Kirchhoff’s Laws.

Related Questions

  1. What is the necessary condition for a conductor to obey Ohm's Law?
  2. Why is the curve representing Ohm's law linear?
  3. State Ohms law. How can it be verified experimentally?
  4. How do you find the resistance to Ohm's law?
  5. What are the 3 forms of Ohm's law
  6. What Is Ohm's Law Graph?
  7. What are the limitations of Ohm's Law?
  8. What are the applications of ohm's law used in daily life?
  9. State Ohms Law. Express It Mathematically. Define Si Unit Of Resistance.
  10. Is resistance constant in Ohm's law?
  11. Draw a circuit diagram to verify ohm’s law.

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CBSE CLASS XII Related Questions

  • 1.
    Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.


      • 2.
        Write any two features of nuclear forces.


          • 3.
            A light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.


              • 4.
                Four independent waves are expressed as \[ (i)\; y_1=A_1\sin\omega t, \] \[ (ii)\; y_2=A_2\sin 2\omega t, \] \[ (iii)\; y_3=A_3\cos\omega t, \] \[ (iv)\; y_4=A_4\sin\left(\omega t+\frac{\pi}{3}\right) \] The interference between two of these waves is possible in

                  • (i) and (iii) only
                  • (iii) and (iv) only
                  • (i), (iii) and (iv) only
                  • All of them

                • 5.
                  If Bohr’s quantization postulate (angular momentum \( = \frac{nh}{2\pi} \)) is a basic law of nature, it should be equally valid for the case of planetary motion also. Why, then, do we never speak of quantization of orbits of planets around the Sun? Explain.


                    • 6.
                      Two heaters rated as \((P_1,V)\) and \((P_2,V)\) are connected in series across a dc source of \(V/2\) volt. The power consumed by the combination will be –

                        • \((P_1+P_2)\)
                        • \(\dfrac{P_1+P_2}{2}\)
                        • \(\dfrac{P_1P_2}{2(P_1+P_2)}\)
                        • \(\dfrac{P_1P_2}{4(P_1+P_2)}\)
                      CBSE CLASS XII Previous Year Papers

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