Physics · Cathode Ray Oscilloscope
In a Cathode Ray Tube (CRT), the source of emission of electrons is a cathode coated with which of the following materials?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Copper and nickel oxide
- 2Tungsten carbide
- 3Barium and strontium oxide✓
- 4Thorium oxide
Correct answer
Barium and strontium oxide
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