The difference between soft and hard $X-$rays is due to their:

Characteristic $X$-rays:

When an $X$-ray tube operates at a tube voltage of $50 \, kV$,the anode current is $20 \, mA$. If the efficiency of the $X$-ray production is $1 \%$,what is the heat produced per second in calories?

Bragg's law for $X$-rays is

According to Moseley's law,the frequency of a spectral line in the $X$-ray spectrum varies as:

The voltage applied across an $X$-ray tube is nearly......$V$.