Question

Figure 4 shows the features of an x-rays tube.

1. Name the parts labelled A and B.
2. Explain how a change in potential across PQ changes the intensity of the x-rays produced in the tube.
3. During the operation of the tube, the target becomes very hot. Explain how this heat is caused.

Answer 1

1. Name the parts labelled A and B.
   • A – Cathode 
   • B – Anode/ copper anode
2. Explain how a change in potential across PQ changes the intensity of the x-rays produced in the tube. 
   • Change in pd across PQ cause change in filament current or temperature of cathode increases thus changes the number of electrons released by the cathode hence intensity of x-rays increases.
3. During the operation of the tube, the target becomes very hot. Explain how this heat is caused. 
   • Most kinetic energy is converted to heat.