(i) They start from the cathode and move towards the anode.
(ii) They travel in a straight line in the absence of an external electrical or magnetic field.
(iii) Characteristics of cathode rays do not depend upon the material of electrodes in a cathode ray tube.
(iv) Characteristics of cathode rays depend upon the nature of gas present in the cathode ray tube.
Correct Answer: (iv) Characteristics of cathode rays depend upon the nature of gas present in the cathode ray tube
Explanation: Among the characteristics of the cathode rays, it does not depend upon the nature of the gas present in the cathode ray tube.