Dr Wadhwa has guided research and development work in such areas as Indicator, X-ray, TV and transmitting tubes. His earlier work related to design of Crossed Field Devices which helped indigenisation of production of components in such diverse fields as Delay Lines, Pulse Transformers, Transistor Circuits, Magnetron Injection Guns, Beam Plasma and Crossed Field Interaction. His work has helped in the achievement of self-reliance through development of technical competence in areas of sophisticated technology.