Q.

Which of the following is not a composition of Nernst glower or Nernst filament?

A. oxides of zirconium
B. oxides of barium
C. oxides of yitrium
D. oxides of thorium
Answer» B. oxides of barium
Explanation: oxides of barium is not present in nernst glower. they are constructed by fusing oxides of zirconium, yitrium and thorium.
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