Answer to Question #182164 in Physics for oliver

Question

Find the voltage across a resistor if the current flowing through it is 5A. And also determine the power and energy consumed by the resistor if the current is allowed to pass through the resistor for 20 min.

Answer 1

Find the voltage across a resistor of resistance R:

$$V=IR=5R.$$

The power:

$$P=I^2R=25R.$$

Energy:

$$E=Pt=30000R.$$