Suppose electrical power P is given by , where E is voltage and R is resistance. Approximate the maximum percent error in calculating the power if 140 volts are applied to a 3000-ohm resistor and the possible percent errors in measuring E and R are 5% and 8%, respectively.
A) 24%
B) 42%
C) 38%
D) 43%
E) 18%

Question

Suppose electrical power P is given by  , where E is voltage and R is resistance. Approximate the maximum percent error in calculating the power if 140 volts are applied to a 3000-ohm resistor and the possible percent errors in measuring E and R are 5% and 8%, respectively.
A) 24% 
B) 42% 
C) 38% 
D) 43% 
E) 18%

Quizplus · Accepted Answer

The Answer is E

Suppose Electrical Power P Is Given by , Where