CROOK’S TUBE EXPERIMENT

by • 01/08/2013 • GeneralComments (0)428

CROOK’S TUBE EXPERIMENT

INTRODUCTION:

Discharge tube or Crook’s tube experiment was conduct by Cieislar and Later on by

Crook’s to observe the passage of electricity through gases.

 

CONSTRUCTION OF DISCHARGE TUBE:

Discharge tube is a glass tube in which two metallic plates are present as electrodes.

The plate attached with +ve end of battery is called “Anode” while the other attached with -ve end of battery is called “Cathode”. Gas is present inside the tube or electrolyte. The internal pressure of tube is controlled by vacuum pump.

 

 EXPERIMENT AND OBSERVATIONS

Discharge tube experiment is based on passage of elements through gases. Crook‘s observe that at normal conditions. Gases can not conduct electricity even due to high voltage. Therefore he takes observations at different intervals by reducing the internal presence.

 

At 1 mm of Hg:

Sparksare observed inside the tube.

 

At few mm of Hg;

Sparksdisappear and electrodes glow while rest remains dark.

At 1 mm of Hg:

The tube mostly filled with glow extending from positive electron it is called positive column.

 

At 0.001 mm of Hg:

The glow disappears and some rays are emitting from cathode and moving through Anode.

 

CONCLUSION:

The radiations emitting from cathode are consist of particles called “cathode rays” which later on known as “Electrons” due to their properties.

Was expanding writemyessay4me.org into plenteous beauty and the trivial, erring life.
Pin It

Leave a Reply