Board of Intermediate Education Karachi Class XII Physics – Midnight Guess Paper – Section C (Long Questions) 1. Ampere’s Law: State Ampere’s Law. Derive the expression for magnetic field inside a solenoid or a toroid. 2. Compton Effect & Photoelectric Effect: Define Compton Effect and derive the expression for Compton shift in wavelength. OR Define Photoelectric Effect, explain experimental results, OR derive Einstein’s Photoelectric Equation. 3. Moving Coil Galvanometer: Describe the construction and working of a moving coil galvanometer. Prove that deflection is proportional to current. 4. First Law of Thermodynamics: State and explain the First Law of Thermodynamics. Explain the following processes: Isobaric Isothermal Adiabatic Isochoric Prove that: CP - CV = R 5. Special Theory of Relativity & AC Generator: Explain the Special Theory of Relativity. Describe the construction and working of an AC Generator. Derive the EMF equation. 6. Faraday’s Law OR Carnot Engine: State Faraday’s Law of Electromagnetic Induction. Derive the expressions for self-induction and mutual induction. Explain construction and working of a Transformer. OR Define Carnot Engine, describe its construction and working, derive its efficiency formula, and draw the Carnot cycle graph.