Match the physical instruments in List I with their corresponding operating principles in List II and select the correct code: List I (Instruments) 1. Transformer 2. Cyclotron 3. Photoelectric Cell 4. Bolometer List II (Principles) 1. Mutual Induction 2. Lorentz Magnetic Force on Charged Particles 3. Quantum Emission of Electrons by Photon Impact 4. Temperature-dependent Electrical Resistance Change

💡 Solution & Explanation

A transformer operates on mutual induction between primary and secondary coils to alter alternating voltages. A cyclotron accelerates charged particles using high-frequency alternating electric fields combined with a perpendicular uniform magnetic field based on Lorentz force. A photoelectric cell works on the emission of electrons when photons strike a photosensitive cathode. A bolometer measures radiant thermal energy by detecting tiny changes in electrical resistance due to temperature variations.