Question

the current through a device is 0.30 A, and the resistance in the device is 40 ohms. How many 1.5 V batteries are required to run the device?

2, 4 , 6 , or 8 ? :/

Answer 1

the needed voltage drop is:
40*0.3=...volts

Answer 2

we get 12?

Answer 3

so the request number of batterie is:
12/1.5=...?

Answer 4

batteries*

Answer 5

8! ohh okay so that is our solution?

Answer 6

yes!

Answer 7

yay thanks!:D

Answer 8

:)