Why Do We Prefer A Potentiometer With A Longer Bridge Wire?

A potentiometer with a longer bridge wire is preferred because such a potentiometer has small potential gradient that makes it more sensitive.


Related Questions

  1. What are the types of potentiometers?
  2. What is balance point in potentiometer?
  3. Copper is not used as potentiometer wire because?
  4. State the Working Principle of a Potentiometer.
  5. How is potential gradient measured?
  6. What are the advantages of a potentiometer?
  7. What is a null point in a potentiometer?
  8. Which Metal Is Used In Potentiometer?
  9. What is a DC Potentiometer?
  10. How does a potentiometer measure EMF?
  11. Sensitivity of potentiometer can be increased by__________.
  12. Why High Resistance Is Used In Potentiometer?

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CBSE CLASS XII Related Questions

  • 1.

    An electron is revolving around a proton in a circular orbit of radius $r$. Using classical physics, prove that the ratio of value of the angular momentum and the value of magnetic moment of electron revolving in the orbit is a constant.


      • 2.
        A current of \(4.0\,\text{A}\) flows through a wire of length \(1\,\text{m}\) and cross-sectional area \(1.0\,\text{mm}^2\), when a potential difference of \(2\,\text{V}\) is applied across its ends. Calculate the resistivity of the material of the wire.


          • 3.
            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.


              • 4.
                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.


                  • 5.

                    (I) The real image of an object placed between $f$ and $2f$ from a convex lens can be seen on a screen placed at the image location. If the screen is removed, is the image still there? Explain.

                    (II) Plane and convex mirrors produce virtual images of objects. Can they produce real images under some circumstances? Explain.


                      • 6.

                        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 $n$.

                          CBSE CLASS XII Previous Year Papers

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