Per NCERT, key observation from cathode-ray experiments was that the characteristics of cathode rays did NOT depend on which of the following?
AThe applied voltage
BThe temperature of the cathode
CThe material of the electrodes OR the nature of the gas in the tube
DWhether a magnetic field is applied
Answer & Solution
Correct answer: C. The material of the electrodes OR the nature of the gas in the tube
Per NCERT §2.1.1(v), cathode-ray behaviour is independent of electrode material + gas type — proving electrons are a universal constituent of all atoms.
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