# Ohms law

##### Intros

###### Lessons

##### Examples

###### Lessons

**Solving for Current with a Single Resistor in Series**

**Solving for Current and Voltage with Multiple Resistors in Series****Solving for Current, Resistance, and Voltage for Circuits with BOTH Series & Parallel Configurations**

###### Free to Join!

StudyPug is a learning help platform covering math and science from grade 4 all the way to second year university. Our video tutorials, unlimited practice problems, and step-by-step explanations provide you or your child with all the help you need to master concepts. On top of that, it's fun — with achievements, customizable avatars, and awards to keep you motivated.

#### Easily See Your Progress

We track the progress you've made on a topic so you know what you've done. From the course view you can easily see what topics have what and the progress you've made on them. Fill the rings to completely master that section or mouse over the icon to see more details.#### Make Use of Our Learning Aids

#### Earn Achievements as You Learn

Make the most of your time as you use StudyPug to help you achieve your goals. Earn fun little badges the more you watch, practice, and use our service.#### Create and Customize Your Avatar

Play with our fun little avatar builder to create and customize your own avatar on StudyPug. Choose your face, eye colour, hair colour and style, and background. Unlock more options the more you use StudyPug.

###### Topic Notes

In this lesson, we will learn:

- A review on the electric circuit and the main components: battery (voltage), closed wire path (current), and devices/resistors that use up electricity (resistance).
- Also, a review on the main rules/methods we used to solve for each concept individually (voltage and Kirchhoffs Loop Rule; current and Kirchhoffs Junction Rule; resistance summation formulas)
- What is the relationship between voltage, current, and resistance?
- How to solve circuit problems for voltage, current, and resistance using Ohms Law which states that:
- $V=IR$
- And also, how to rearrange Ohms Law: $V=IR$; $I= \frac{V} {R}$; $R= \frac{V} {I}$

__Notes:__- Recall that: a circuit is a closed loop that charge flows within; the three main components of a circuit are
(provided by a battery source),__voltage__(the rate of flow of charge within the circuit wires), and__current__(a property of the electronic devices using up energy).__resistance__ - Voltage is measured in the unit
which is equal to Joules/Coulomb__volts (V)__ - Current is measured in the unit
which is equal to Coulombs/Second__ampere (A)__ - Resistance is measured in the unit
($\Omega$) which is equal to Volts/Ampere__ohm__ **Ohms Law**states that the voltage is equal to the current multiplied by resistance:- $V=IR$
- For metals, resistance is constant and independent of voltage
- Voltage is directly proportional to current ($V \propto I$)
- The
equation can be rearranged to solve for any of the three main concepts (voltage, current, resistance).__Ohms Law__ - $V=IR$; $I= \frac{V} {R}$; $R= \frac{V} {I}$
- The current coming out of a battery is dependent on the resistance of the circuit its connected to
- Solving questions using Ohms Law requires a
__strong understanding__of solving for the three main concepts individually - Voltage: Kirchhoffs 2
^{nd}Rule: Loop Rule (sum of all voltages around the loop equal zero); all parallel branches are equal to the same voltage drop - Current: Kirchhoffs 1
^{st}Rule: Junction Rule (sum of all currents into a junction equal to sum of all currents out of the junction) > - Resistance: total equivalent resistance in series ( $R_{eq(series)} = \sum_{k=1}^{n} R_{k}$ ) and in parallel ($R_{eq(parallel)} =\frac{1} { \sum_{k=1}^{n} \frac{1}{R_{k}} }$ )

2

videos

remaining today

remaining today

5

practice questions

remaining today

remaining today