SaitechAI Worksheet
Important Formulae – Electromagnetic Induction
Q1. State Faraday’s law of electromagnetic induction and write its formula.
ε = dφ/dt, where ε = induced emf. (Faraday’s Law)
Q2. Derive the expression for motional emf in a conductor.
ε = – B l v (Motional emf)
Q3. Find the emf developed between the ends of a rod rotating in a magnetic field.
V = ½ B ω l²
Q4. State the relation between magnetic flux and inductance.
φ = L I
Q5. Write the expression for self-induced emf in a coil.
ε = – L dI/dt
Q6. Define mutual inductance and give its formula.
ε₁ = – M₁₂ dI₂/dt
Q7. Derive the expression for self-inductance of a solenoid.
L = μr μ0 n² A l
Q8. State the emf equation of an AC generator.
e = nBAω sin ωt (ω = 2πv)
Q9. Write the expression for energy stored in an inductor.
U = ½ L I²
Total Marks: 0/20