Answer to Question #146225 in Field Theory for sunny

Question

You measured that your flashlight experiences a current of 0. 40 A when you insert a brand new 3.0 V Energizer battery. We can take it that the internal resistance of a new battery is almost zero.

Answer 1

$$R=\frac{U}{I}\\R=\frac{3}{0.4}=7.5\Omega$$