Mutual Inductance — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Mutual Inductance.

Calculation of induced EMF with varying current functions

high

NEET often tests the application of calculus in physics. Questions involving current varying as $I(t) = I_0 sin(\omega t)$ or $I(t) = at^2 + bt + c$ are common for self-inductance and can easily be extended to mutual inductance. Aspirants need to be proficient in differentiating these functions to find $\frac{dI}{dt}$ and then calculating the induced EMF. This tests both mathematical skills and conceptual understanding of Faraday's law.

Conceptual questions on factors affecting mutual inductance and Lenz's Law

high

Understanding the dependencies of M (number of turns, geometry, orientation, core material) is fundamental. Questions might present scenarios where one of these factors is changed and ask about the effect on M or the induced EMF. Additionally, questions applying Lenz's Law to determine the direction of induced current or EMF in the secondary coil when the primary current changes (increasing/decreasing) are perennial favorites, testing qualitative understanding.

Comparison with Self-Inductance and Coefficient of Coupling

medium

Distinguishing between self and mutual inductance is a key learning objective. Questions might directly ask for differences or present a scenario where both concepts are at play. The relationship $M = k \sqrt{L_1 L_2}$ is a direct formula often tested, either to find M, k, or one of the L values. This combines knowledge of both types of inductance and a specific formula.