From 88d12f31e4828aa26f38d71a200cf87d6deb4ca4 Mon Sep 17 00:00:00 2001 From: James Su Date: Wed, 5 Jun 2019 02:15:03 +0000 Subject: [PATCH] Update Unit_4_Physics_Study_Sheet.md --- .../SNC1DZ/Unit_4_Physics_Study_Sheet.md | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/Grade 9/Science/SNC1DZ/Unit_4_Physics_Study_Sheet.md b/Grade 9/Science/SNC1DZ/Unit_4_Physics_Study_Sheet.md index aa75615..953783a 100644 --- a/Grade 9/Science/SNC1DZ/Unit_4_Physics_Study_Sheet.md +++ b/Grade 9/Science/SNC1DZ/Unit_4_Physics_Study_Sheet.md @@ -266,7 +266,7 @@ - The electric currnet is measured by an `ammeter`. - It is connected `in series` to the item you wnat to measure, which means you put the ammeter `infront or behind` the item you want to measure. -### 3. Potential Difference / Voltageg +### 3. Potential Difference / Voltage - the `difference` in electrical potential `energy` when a charge moved between `2 points` in an electric circuit. - **Symbol** for **Voltage**: `V`. - **Unit** for **Voltage**: `Volt[V]` @@ -288,5 +288,21 @@ - `Everything` has resistance. Conductor has low resistnace. Insulator has high resistance. - Example: wire has an resistnace so low that it is ignored in many calculations. +## Product Efficiencies +- Simply take the output / input x 100 and you get the percentage of the efficiency of your product. +## Ohm's Law +- Ohm's law states that $`V = IR`$, which means the volatage is equal to the current multiplied by the resistance. +- When given a circuit, with one unknown value such as `I`, simply use Ohm's law to find the missing value. +## Series Circuits +- In a series circuit, there are a set of rules where the current, voltage, and resistance follow. +- $`I_T = I_1 = I_2 = I_3 \cdots = I_N`$ +- $`V_T = V_1 + V_2 + V_3 \cdots + V_N`$ +- $`R_T = R_1 + R_2 + R_3 \cdots + R_N`$ + +## Parallel Circuits +- In a parallel circuit, there are also a set of rules where the current, voltage, and resistance follow. The current and voltage rules are swapped in this case. +- $`I_T = I_1 + I_2 + I_3 \cdots + I_N`$ +- $`V_T = V_1 = V_2 = V_3 \cdots = V_N`$ +- $`R_T = (R_1 + R_2 + R_3 \cdots + R_N)^{-1}`$ (I think). \ No newline at end of file