Q4 of 22 Page 113

Identify the wrong statement regarding the properties of cathode rays and correct it.

1. Cathode rays are made up of large particles with mass and kinetic energy.


2. Cathode rays are deflected by the magnetic field.


3. Cathode rays depend on the nature of the gas inside the tube.

(3)

Reason- Cathode rays do not depend on the nature of the gas inside the tube as demonstrated by J.J. Thompson in his experiment.


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2

Fill in the blanks:

1. ______is a negatively charged particle. (Electron/Proton)


2. Proton is deflected towards the___ charged plate. (positively, negatively)

 3

Match the entries of column I with the appropriate entries of column II and column III: (Double matching)

 5

Why does a light paddle wheel placed in the path of cathode rays begin to rotate, when cathode rays fall on it?

 5

a) What happens in the discharge tube if a high voltage is applied at a gas pressure of 760 mm mercury?

b) What will happen if the pressure is reduced to 0.01mm of mercury?