Question

How do the currents produced by a 1.5 V flashlight battery and a 12 V car battery compare if the resistance is the same?

Answer 1

Answer: Current offered by the car battery is 8 times the current offered by the batteries in the flash lights.

I' = 8 × I

Step-by-step explanation:

Voltage used in flash lights ,V = 1.5 Volts

Current offered by the V = I

`V=IR`...(1)

Voltage used in car battery,V' = 12 Volts

Current offered by the V' = I'

`V'=I'R'`..(2)

Dividing (2) and (1)

`(V')/(V)=(I'R')/(IR)=(I'R)/(IR)=(I')/(I)`

(Given that resistance offered by both is same,R'=R)

`(12 volts)/(1.5 volts)=(I')/(I)`

I' = 8 × I

Current offered by the car battery is 8 times the current offered by the batteries in the flash lights.