Posted by **Leo** on Sunday, June 17, 2012 at 11:10pm.

A car has a 12 volt battery. The engine has a resistance of 0.22 ohms. How many amps will be drawn from the battery when the key is turned?

- Physics -
**David E**, Sunday, June 17, 2012 at 11:27pm
V=IR

V= 12v

R= 0.22 ohms

I = V/R

= 12/0.22

=54.5 amps

- math -
**Nancy**, Sunday, June 17, 2012 at 11:28pm
E= I x R is the formula

the answer is .5454

I=amperes

R=ohms

E=volts

12volts/22

- math -
**Nancy**, Sunday, June 17, 2012 at 11:29pm
actually David is right. I forgot the decimal place from the 22 so it is 54.5 amps

- math -
**Leo**, Sunday, June 17, 2012 at 11:40pm
thank you

- math -
**Ushango**, Tuesday, February 23, 2016 at 10:13am
Three cells are connected. The external resistance of each cell is 2 ohms. The voltage of each cell is 1.5 volts. The resistance of the external circuit is 2.3 ohms. What is the circuit current to the nearest tenth ampere?

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