What Is The Formula Of Ammeter?

Ammeter is a device that is used to measure current. The two leads of an ammeter need to be connected in series in an electrical circuit. When current flows through the ammeter, it measures the current. The relationship between current and the resistance in an electric circuit is given by Ohm’s law.

I = V/R

  • Where, I is the current through the circuit
  • V is the voltage
  • R is the resistance

Related Questions

  1. An electric lamp of 100 Ohms, a toaster of resistance 50 Ohms, and a water filter of resistance 500 Ohms are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances, and what is the current through it?
  2. What is the necessary condition for a conductor to obey Ohm's Law?
  3. Obtain the equation J = σE of Ohm's law on the basis of drift velocity
  4. Define: 1 volt, Potential difference
  5. What Is Effective Resistance?
  6. State And Explain Joules Law Of Heating.
  7. State Ohms law. How can it be verified experimentally?
  8. Why is the curve representing Ohm's law linear?
  9. Draw a circuit diagram to verify ohm’s law.
  10. State Ohms Law. Express It Mathematically. Define Si Unit Of Resistance.
  11. What Is The Basic Principle Of Ohm's Law?
  12. Obtain the equation of Ohm's law on the basis of drift velocity
  13. Is resistance constant in Ohm's law?
  14. What are the applications of ohm's law used in daily life?
  15. Why Do We Use Ohm's Law?

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CBSE CLASS XII Related Questions

  • 1.
    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.


      • 2.

        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.


          • 3.

            The number of free electrons per unit volume ($\text{m}^3$) in a wire made of copper (resistivity $1.72 \times 10^{-8}\,\Omega\,\text{m}$) is $8.5 \times 10^{28}$. Calculate the average number of collisions made by an electron in one second when an electric field is maintained in the wire.


              • 4.

                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.


                  • 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.

                        A rectangular loop of size 5 cm $\times$ 8 cm is lying in the $x$-$y$ plane in a uniform magnetic field $\vec{B} = (2.0\ \text{T})\hat{k}$. The total magnetic flux linked with the loop is:

                          • 80 Wb
                          • 16 Wb
                          • \(8 \times 10^{-2}\) Wb
                          • \(8 \times 10^{-3}\) Wb
                        CBSE CLASS XII Previous Year Papers

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