Question

In heat wave diathermy, the maximum power given out is 500 W and the maximum voltage possible is 4000V. Thus, what is the highest resistance that heat wave diathermy machine can deal with?

(a) 3.2 K ohm

(b) 32 K ohm

(c) 320 K ohm

(d) 3200 K ohm

I had been asked this question in unit test.

I'd like to ask this question from Diathermy, Measurement of Radiation, Dose and its Calculations in chapter Radiation Therapy of Clinical Science

Answer 1

Right option is (b) 32 K ohm

For explanation: The simple formula for power, voltage and resistance is used. P = V2/R

           R = V2/P

           R = 40002/500

           R = 32 K ohm.