(a) Describe different methods of resistance welding. (10) (b) A low…
Previous year question for Utilization of Electrical Energy.
Question
(a) Describe different methods of resistance welding. (10)
(b) A low frequency induction furnace operating at $10\text{ volts}$ in the secondary circuit takes $500\text{ kW}$ at $0.5\text{ p.f.}$ when the hearth is full. If the secondary voltage be maintained at $10\text{ volts}$, estimate the power observed and the power factor when the hearth is half-full. Assume the resistance of the secondary circuit to be thereby doubled and the reactance to remain the same. (10)
- Year: 2018
- Subject: Utilization of Electrical Energy