Q23Short answer
What is the difference between a direct current and an alternating current? How many times does AC used in India change direction in one second? 100 E XEMPLAR P ROBLEMS – SCIENCE
Show answer
Direct current always flows in one direction but the alternating current reverses its direction periodically. The frequency of AC in India is 50 Hz and in each cycle it alters direction twice. Therefore AC changes direction 2 × 50 = 100 times in one second.