Electrons in a cathode ray tube have been emitted with a velocity of 1000 ms. The number of following statements which is/are true about the emitted radiation is:

[Given: Js, kg]

(A) The de Brogli

Question

Electrons in a cathode ray tube have been emitted with a velocity of 1000 ms. The number of following statements which is/are true about the emitted radiation is:

[Given:  Js,  kg]

(A) The de Broglie wavelength of the electron emitted is 666.67 nm
(B) The characteristics of electrons emitted depend upon the material of the electrodes of the cathode ray tube.
(C) The cathode rays start from cathode and move towards anode.
(D) The nature of the emitted electrons depends on the nature of the gas present in cathode ray tube.

Canvas Classes · Accepted Answer

Check each statement:

(A) de Broglie wavelength:

✓ True

(B) Electrons are fundamental particles — their properties do not depend on electrode material. ✗ False

(C) Cathode rays travel from cathode to anode (negative to positive). ✓ True

(D) Electrons are identical regardless of gas used — their nature does not depend on the gas. ✗ False

True statements: (A) and (C) → 2

Answer: 2

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