The electric current in an X-ray tube (from the target to the filament) operating at `40 kV `is `10 mA`. Assume that on an average, 1% of the total kinetic energy of the electrons hitting the target are converted into X-rays (a) what is the total power emitted as X-rays and (b) how much heat is produced in the target every second?

Answer

A, B, C, D

Explanation

(a) P = Vi = (40xx10^3)(10xx10^(-3))
-400 W
1% of 400 W is 4 W. (b) Heat generated = 400 W - 4 W
=396 W = 396 J//s.