Suppose that an x-ray tube, operating for 25 ms at 125 kvp has generated 2.5 × 1014 photons off the anode and through the filter. during this time, what was the magnitude of the tube current?

given that tube is operated for t = 25 ms

which means the time for which it is used is t = 0.025 s

now the photons generated is given as

each photon will produce 1 electron as we can assume it to be 100% efficient

so number of electrons per second will be same as number of photons per second

now in order to find the current we can say

current = rate of flow of charge

so the current in the tube for given time will be 1.6 mA

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)