IAS 2024 — Physics

Consider the following activities : 1. Identification of narcotics on passengers at airports or in aircraft 2. Monitoring of precipitation 3. Tracking the migration of animals In how many of the above activities can the radars be used ?

Consider the following statements : 1. Statement-I : Giant stars live much longer than dwarf stars. 2. Statement-II : Compared to dwarf stars, giant stars have a greater rate of nuclear reactions. Which one of the following is correct in respect of the above statements ?