A Moving Coil Galvanometer of Resistance 100 Ω Produces Full‑Scale Deflection When a Current of 20 mA Flows Through It
In this topic explanation, we discuss how a moving coil galvanometer full scale deflection occurs when a certain current flows through the instrument. This concept is important for Class 12, NEB and CTEVT Physics.
Given
Resistance of galvanometer, R = 100 Ω
Current for full‑scale deflection, I = 20 mA = 0.02 A
Explanation
A moving coil galvanometer produces full‑scale deflection when the torque due to the current in the coil balances the restoring torque of its suspension. The current that causes this maximum deflection is called the full‑scale deflection current.
In this case, the galvanometer has a resistance of 100 Ω, and full‑scale deflection occurs at 20 mA of current.
The sensitivity of the galvanometer is inversely related to its resistance and directly related to the coil and magnetic field strength.
full scale deflection in moving coil galvanometer
Keywords
moving coil galvanometer full scale deflection, galvanometer resistance 100 ohm, full scale current 20 mA, current measurement, galvanometer sensitivity, Class 12 physics, NEB physics, CTEVT physics, electromagnetism, torque in galvanometer, current instrument, exam physics notes, galvanometer explanation
Tags
moving coil galvanometer, full scale deflection, galvanometer sensitivity, current measurement, class 12 physics, NEB physics, CTEVT, electromagnetism, physics notes, exam question, galvanometer resistance, aklearningnepal, education, physics concepts,full scale deflection in moving coil galvanometer
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full scale deflection in moving coil galvanometer