Question

If you have a 45.0 V battery connected to a 10.0 ohms resistor and a 50.0 ohms resistor in series, what will be the total power in the circuit?

A. 50.0 W
B. 33.8 W
C. 203 W
D. 405 W

Answer 1

current is:
I=V(R_1+R_2)= 45/(50+10)=...?
since resistors #1 and #2 are connected in series

Answer 2

45/60 = 0.75?

Answer 3

ok!

Answer 4

now, the requested power is:
P=45*0.75=...watts

Answer 5

namely:
power P= V*I

Answer 6

33.75! so our solution is choice B? 33.8 W ?

Answer 7

correct!

Answer 8

yay! thanks!!:)

Answer 9

:)