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What Is The Working Principle Of Voltmeter?

A voltmeter works on the principle of Ohm’s law. It is used to measure the potential difference between two points of a circuit.

Related Questions

  1. What Is The Formula Of Ammeter?
  2. State And Explain Joules Law Of Heating.
  3. What are ohmic and non-ohmic devices? Give examples.
  4. What is the necessary condition for a conductor to obey Ohm's Law?
  5. The resistance R= V/I, where V=100 ± 5.0V and I = 10 ± 0.2A. What is the total error in R?
  6. Draw a circuit diagram to verify ohm’s law.
  7. Is resistance constant in Ohm's law?
  8. What are the applications of ohm's law used in daily life?
  9. Why is the series arrangement not used for domestic circuits?
  10. Why is the curve representing Ohm's law linear?
  11. Obtain the equation J = σE of Ohm's law on the basis of drift velocity
  12. Find the current through a resistance of 2 ohms if the voltage across the resistance is 6 V.
  13. A battery of 9 V is connected in series with resistors of 0.2 Ohms, 0.3 Ohms, 0.4 Ohms, 0.5Ohms, and 12 Ohms respectively. How much current would flow through the 12-ohm resistors?
  14. A small bulb has a resistance of 2 ohms when it is cold. It draws 0.4-ampere current from a source of4V and then starts glowing. Calculate the resistance when it is glowing
  15. Why Do We Use Ohm's Law?

Read More:

Ohm’s Law – Important Topics
Carbon Resistor Electromotive Force Cells, emf, Internal Resistance
Combination of Resistors Electrical Formula Difference Between Primary Cell and Secondary Cell
Types of Current Power transformers Difference between AC and DC
Derivation of Drift Velocity Wheatstone Bridge Resistivity Temperature Dependence
Permittivity And Permeability Resistor Colour Codes Differences Between Acceleration and Velocity
Circuit Diagram Resistance Formula Difference between RTD and thermocouple
Power Of Alternating Current Kirchhoff’s Rules Relation between power and resistance
Static Electricity Ampere Relation between kva and kw
Uses of Resistor Current Density Difference between air conditioning and refrigeration
Types of Resistors Unit of Current Unit of Specific Resistance
Voltage divider formula Meter Bridge Difference between earth and neutral
Internal resistance formula Potentiometer Difference between kva and kw
Current Electricity Drift Velocity Relation between resistance and length
Cells in Series and in Parallel Electric Dipole Difference between emf and voltage
Current density formula Resistivity formula NCERT Solutions Current Electricity

CBSE CLASS XII Related Questions

  • 1.
    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
      View Solution

    • 2.
      The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:

        • \( \frac{q}{4 \pi \epsilon_0 l^2} \) pointing along MA
        • \( \frac{q}{\pi \epsilon_0 l^2} \) pointing along AM
        • \( \frac{q}{2 \pi \epsilon_0 l^2} \) pointing along AM
        • Zero
        View Solution

      • 3.
        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.

            View Solution

          • 4.
            Photoemission of electrons occurs from a metal (\( \phi_0 = 1.96 \, \text{eV} \)) when light of frequency \( 6.4 \times 10^{14} \, \text{Hz} \) is incident on it. Calculate: Energy of a photon in the incident light, The maximum kinetic energy of the emitted electrons, and The stopping potential.

                View Solution

              • 5.
                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 –

                  • \((P_1+P_2)\)
                  • \(\dfrac{P_1+P_2}{2}\)
                  • \(\dfrac{P_1P_2}{2(P_1+P_2)}\)
                  • \(\dfrac{P_1P_2}{4(P_1+P_2)}\)
                  View Solution

                • 6.
                  Assertion (A) : The mass of a nucleus is less than the sum of the masses of the constituent nucleons. Reason (R) : Energy is absorbed when the nucleons are bound together to form a nucleus.

                    • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
                    • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
                    • Assertion (A) is true, but Reason (R) is false.
                    • Both Assertion (A) and Reason (R) are false.
                    View Solution
                  View All

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