Question

Why is the cathode ray tube connected to a vacuum pump?

a) To reduce air resistance inside the tube
b) To increase the flow of electrons
c) To prevent electron emission
d) To enhance the visibility of the electron beam

Answer 1

The cathode ray tube is connected to a vacuum pump to reduce air resistance inside the tube, enhancing the visibility of the electron beam.

Step-by-step explanation:

The cathode ray tube is connected to a vacuum pump in order to reduce air resistance inside the tube.

When a cathode ray tube operates, it generates a beam of electrons that travel from the cathode to the anode. If the tube is not evacuated or has air present, the air molecules can obstruct the path of the electron beam, leading to scattering and reduced visibility.

By connecting the cathode ray tube to a vacuum pump and removing air from the tube, the electrons can travel in a straight path without any air resistance, enhancing the visibility of the electron beam.