Which of the following gases are filled in electric bulbs?
A. Helium and Neon
B. Neon and Argon
C. Argon and Hydrogen
D. Argon and Nitrogen
Answer:D
Which of the following gases are filled in electric bulbs?
A. Helium and Neon B. Neon and Argon C. Argon and Hydrogen D. Argon and Nitrogen