GK
PHYSICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
These rays can ionise gases
|
|
|
These rays can penetrate through thin metal foils
|
|
|
These rays make materials cool on which they fall
|
|
|
Cathode rays are invisible and travel in a straight line
|
Detailed explanation-1: -Cathode rays do not deflect in electric field. The properties of cathode rays include producing heating effect, casting shadows, producing florescence etc.
Detailed explanation-2: -Property 1: Cathode rays travel in a straight line and can cast sharp shadows. Property 2: Cathode rays are negatively charged. Property 3: Electric field and magnetic field deflect cathode rays.
Detailed explanation-3: -Cathode rays are charged particles (charge on electrons) so, this is correct. Cathode rays can be deflected by electric and magnetic fields so, it is correct. Hence, the option that says cathode rays have the same speed as of light is incorrect.
Detailed explanation-4: -Nature of cathode rays does not depend upon the nature of the gas in discharge tube.
Detailed explanation-5: -Cathode rays are negatively charged. Cathode rays travel in a straight line and can cast sharp shadows. Cathode rays travel in a straight line and can cast sharp shadows. Cathode rays show deflection when placed in an electric field and magnetic field. More items