The main electrode of high pressure mercury vapour lamp is made up of? A. Quartz B. Hard glass C. Tungsten D. Bronze Right Answer: C. Tungsten Share : January 16, 2018 Hassan Ali Electrical Engineering Total 0 Votes: 0 0 Tell us how can we improve this Mcqs? Captcha: + = Verify Human or Spambot ? Related Mcqs Check Below -Which material has a lower dielectric strength at 50 Hz?What type of earthing is used by transmission lines?The resistance of an electric arc can be increased by?