The cathode in the Coolidge tube is made of which of the following elements?
A. Quartz
B. Iron
C. Tungsten
D. Barium
Answer:C
The cathode in the Coolidge tube is made of which of the following elements?
A. Quartz B. Iron C. Tungsten D. Barium
Explanation: The cathode in the Coolidge tube is made of tungsten. The anode is made of copper.