Find the total resistance and the potential difference for the resistors connected in parallel where the amounts of the resistors are : R1=10 Ohm R2=5 Ohm R3=2 1.25 Ohm and 12V
1.25 Ohm and 15V
17 Ohm and 15V
17Ohm and 12V

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

i think its c if i'm wrong

i think the answer is tomato juice? not entirely sure though