Understand the construction of a ballistic galvanometer with diagram, components, working principle, advantages, applications, and differences from an ordinary galvanometer. 

Learn how speed control by Ward Leonard method works, including its principle, construction, advantages, disadvantages, and industrial applications. 

Learn why two wattmeters are used in 3-phase power measurement, how Blondel’s Theorem works, and how total power and power factor are calculated in 3-wire systems.

Discover advanced digital IC trainer kits and lab equipment by Nvis Technologies, designed for hands-on learning in digital electronics and engineering education.