question_answer

Cathode rays and canal rays produced in a certain discharge tube are deflected in the same direction if [SCRA 1998]

A)            A magnetic field is applied normally

B)            An electric field is applied normally

C)            An electric field is applied tangentially

D)            A magnetic field is applied tangentially

Correct Answer: A

Solution :

                   In discharge tube cathode rays (a beam of negative particles) and canal rays (positive rays) moves opposite to each other. They will experience a magnetic force in the same direction, if a normal magnetic field is switched on