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Formula Sheet

Torque on a Current-loop: Moving-Coil Galvanometer — Formula Sheet

ICSE · Class 12 · Physics

19 formulas from Torque on a Current-loop: Moving-Coil Galvanometer (ICSE Class 12 Physics) on one page, grouped by topic.

41 questions30 flashcards19 formulas & key relations5 concepts

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19 Entries · 5 Sections

Formulas and Key Relations

1. Torque on a Current Loop

F = I l × B

F1 = F2 = IBl

τ = IAB sinθ

τ = NIAB sinθ

τ = mB sinθ = m × B

2. Moving-Coil Galvanometer

NIAB sinθ = cφ

I = cφ/(NAB sinθ)

NIAB = cφ

I = (c/NAB)φ = Kφ

I ∝ φ

3. Galvanometer Sensitivity and Figure of Merit

φ/I = NAB/c

φ/V = NAB/(cR)

Figure of merit = I/φ

Unit of figure of merit = ampere/radian

4. Ammeter Conversion

I_g × G = (I - I_g) × S

S = (I_g/(I - I_g))G

1/R_A = 1/G + 1/S

R_A = GS/(G + S)

Key relations

Torque is maximum when the plane of the coil is parallel to the magnetic field, so θ = 90° and τ_max = NIAB.

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Frequently Asked Questions

What are the important topics in Torque on a Current-loop: Moving-Coil Galvanometer for ICSE Class 12 Physics?
Key topics in Torque on a Current-loop: Moving-Coil Galvanometer include Torque on a Current Loop in a Uniform Magnetic Field, Moving-Coil Galvanometer and Radial Magnetic Field, Conversion of Galvanometer into Ammeter and Voltmeter. Study these first, then practise questions on each for the ICSE Class 12 board exam.
How many formulas are in Torque on a Current-loop: Moving-Coil Galvanometer?
This sheet lists 19 formulas from Torque on a Current-loop: Moving-Coil Galvanometer, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Torque on a Current-loop: Moving-Coil Galvanometer for the ICSE Class 12 board exam?
Learn the core ideas first, then work through the 41 practice questions on Torque on a Current-loop: Moving-Coil Galvanometer. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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