Physics Practicals Class 12

Figure of Merit of Galvanometer

  • Perform science experiments at your fingertips
  • Learn anytime and from anywhere
  • 3D gamified way of advanced learning
  • Boost your academic score
  • Accessible through Mobile, Laptop, Desktop, and Tablet
  • Gain a competitive edge in IIT and NEET exams

About Simulation

  • In this simulation, you will be able to understand the half-deflection method to determine the resistance of a galvanometer.
  • You will also learn about the figure of merit of galvanometer.
  • All the galvanometer experiment steps and procedures like connecting wires, noting down the readings, varying galvanometer deflections, etc., are highly interactive and have been simulated in a very similar manner as you do in a physics lab.
  • This interaction provides a very immersive virtual environment and gives you a real-lab-like experience while conducting or performing experiments.
  • It is one of the important class 12 physics practicals that you can learn in our virtual lab.

Figure of Merit of Galvanometer

Simulation Details

Duration – 30 Minutes
Easily Accessible
Language – English
Platforms – Android & Windows


A galvanometer is a sensitive device that is used to detect very low currents. The working of a galvanometer is based on the principle that a coil placed in a uniform magnetic field experiences a torque when an electric current is set up in it. The deflection of the coil is determined by a pointer attached to it, moving on the scale. When a coil carrying current 𝐼 is placed in a radial magnetic field, the coil experiences a deflection 𝜃 which is related to 𝐼 as $$I=k \theta$$

where, 𝑘 is a constant of proportionality and is termed as a figure of merit of the galvanometer. The resistance of the galvanometer found by the half-deflection method is $$G=\frac{R S}{R-S}$$

Where, 𝑅 is the resistance connected in series with the galvanometer and 𝑆 is the shunt resistance.

The figure of merit of galvanometer is given by $$k=\frac{E}{(R+G) \theta}$$

Where, 𝐸 is the emf of the cell and 𝜃 is the deflection produced with resistance 𝑅.

Requirements for this Science Experiment

Galvanometer Battery Eliminator Resistance Box Plug Key Connecting wires

Why Choose SimuLab for Science Practicals?

Image Gallery

Try SimuLab

A 3D virtual science lab (physics lab, chemistry lab, and biology lab) that helps students learn science experiments easily.

Unlock Your Free Science Experiments

    Download Cadaviz Brochure

      Download SimuLab Admin Manual

        Download SimuLab Brochure

          Download SimuLab Student Manual

            Download Student Windows App Form

              Select User Type

              Select Country