NEET Physics Question - Modern Physics

Assertion (A): Anode of Coolidge tube gets heated up at time of emission of X-rays.

Reason (R): The anode of Coolidge tube is made of a material of high melting point.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

When high-energy electrons strike the anode in an X-ray tube, most of their kinetic energy (around 99%) is converted into heat, causing the anode to get very hot. So (A) is true. Because of this extreme heating, the anode is made from materials with a high melting point, like Tungsten, to withstand the temperature. So (R) is true. However, (R) describes a design choice made due to the heating, not the explanation for why heating occurs. Hence, (R) is not the correct explanation for (A).

Rankers Physics

Coolidge Tube Anode Heating

Solution:

Leave a Reply Cancel reply