Which of the following options explains the process of ‘sputtering’ that occurs in Hollow Cathode Lamp?
A. Positive ions collide with cathode surface and metal atoms from cathode are ejected
B. Negative ions collide with cathode surface and metal atoms from anode are ejected
C. Positive ions collide with negative ions and metal atoms from anode are ejected
D. Positive ions collide with negative ions and photons are ejected
Answer:A
Which of the following options explains the process of ‘sputtering’ that occurs in Hollow Cathode Lamp?
A. Positive ions collide with cathode surface and metal atoms from cathode are ejected B. Negative ions collide with cathode surface and metal atoms from anode are ejected C. Positive ions collide with negative ions and metal atoms from anode are ejected D. Positive ions collide with negative ions and photons are ejected
Explanation: When potential is applied across the electrode, the gas filled in tube ionises and flow of current occurs. Positive ions collide with negatively charged cathode surface and metal atoms from cathode are ejected.