You wish to purchase a dental X ray machine and have the choice between 60kVp and 70kVp machines. With single change from 60kVp to 70kVp what would the approximate affects on exposure time?CHECK
A. No effect
B. Half the time
C. Double
D. Quarter
E. Triple the time
A. No effect
B. Half the time
C. Double
D. Quarter
E. Triple the time