Question
What is a discharge tube?
Solution
The discharge tube is a glass tube which is 70 cm long and having a diameter of 5 cm. Two metal electrodes are sealed at the two ends, one of which is connected to the negative terminal of a battery and the other to the positive terminal and a gas at low pressure inside the tube. A side tube is fused at the centre of the glass tube which serves to pump out air from it, using a suction pump.
