Lesson: Ohm's Law and Calculation of Resistance
In this lesson, we will learn how to use the formula V = IR (Ohm's law) to calculate the resistance in simple electronic circuits.
Sample Question Videos
Worksheet: 10 Questions • 7 Videos
A resistor is connected in series with a power supply of 35 V, producing a current in the resistor of 0.25 A. What is the resistance of the resistor?
An indicator light on a DVD player has a resistance of 300 Ω and the current in the light is 55.0 mA. How many volts are supplied to operate the light?
What is the current through the bulb of a flashlight that has a resistance of 5.0 Ω if the flashlight is powered by a battery with an emf of 4.5 V?