Step 1: Understanding the Concept: The frequency of alternating current (AC) is standardized differently in different countries: India: 50 Hz USA and some other countries: 60 Hz Step 2: Detailed Explanation: In India, power stations produce alternating current with a frequency of 50 cycles per second (50 Hz). This ensures synchronization of appliances and grids across the country. Step 3: Final Answer: The AC frequency in India is 50 Hz.