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Formula Sheet

Torque on a Current-loop: Moving-Coil Galvanometer

ICSE · Class 12 · Physics

All formulas from Torque on a Current-loop: Moving-Coil Galvanometer in ICSE Class 12 Physics. Key equations, constants, and identities for board exam preparation.

41 questions30 flashcards5 concepts

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18 Formulas · 4 Sections

Formulas

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)

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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 Chapter Overview: Torque on Current-loop and Moving-Coil Galvanometer, Chapter Content Overview - Torque on Current Loop and Galvanometer, Torque on Current-Loop and Galvanometer - Concept Overview. These are the concepts ICSE Class 12 examiners draw on most — study them first, then practise related questions.
How to score full marks in Torque on a Current-loop: Moving-Coil Galvanometer — ICSE Class 12 Physics?
Understand the core concepts first, then work through the 41 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

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