2. Electricity Chapter Notes – Prepared by Sarthak Patil


šŸ”‹ Key Concepts:


Electric Current (I): Flow of electric charge.

šŸ‘‰ Unit: Ampere (A)


Voltage (V): Electric potential difference.

šŸ‘‰ Unit: Volt (V)


Resistance (R): Opposition to the flow of current.

šŸ‘‰ Unit: Ohm (Ī©)

---


šŸ”Œ Important Formulas:


1. Ohm’s Law:

šŸ”ø V = I × R


2. Power (P):

šŸ”ø P = V × I

šŸ”ø P = I² × R

šŸ”ø P = V² ÷ R


3. Electrical Energy:

šŸ”ø E = P × t (in Joules)

šŸ”ø E = P × t ÷ 1000 (in kWh)

---


šŸ§® Resistor Combinations:


Series:

šŸ”ø R_total = R₁ + R₂ + R₃ + ...


Parallel:

šŸ”ø 1/R_total = 1/R₁ + 1/R₂ + ...

---


šŸ§  Tips to Remember:


In Series:

šŸ”ø Current is same

šŸ”ø Voltage divides


In Parallel:

šŸ”ø Voltage is same

šŸ”ø Current divides


Power increases with square of current!

---


šŸ“Œ Posted by: Sarthak Prakash Patil

šŸ“– Sarthak’s Education Corner





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