A calculator is rated at 0.37 W when con-
nected to 2.60 V battery.
What is the resistance of this device?

Respuesta :

Answer:

18.6 Ω

Explanation:

Resistance = [tex]\frac{Voltage}{Current}[/tex]

But first we have to find the current.

Current = [tex]\frac{Power}{Voltage}[/tex]

Power = 0.37W

Voltage = 2.60V

∴ Current = [tex]\frac{0.37}{2.60}[/tex]

= 0.14 ( 3 significant figures)

Now we can find the resistance.

Resistance = [tex]\frac{2.60}{0.14}[/tex]

= 18.6 Ω ( 3 significant figures)