Physics Practicals Class 12
Figure of Merit of Galvanometer
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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.
Simulation Details
Description
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
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