Practice question

Given: A coil of 150 turns and area 0.05 m² is in a field that increases from 0 to 0.06 T in 0.3 s. What is the induced emf? These values define the system as per NCERT data. Formula: Δ Phi = B A = 0.06 × 0.05 = 0.003 Wb. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: varepsilon = N Δ Phi/Δ t = 150 × 0.003/0.3 = 150 × 0.01 = 1.5 V . Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.