2. Electricity Chapter Notes – Prepared by Sarthak Patil


๐Ÿ”‹ Key Concepts:


Electric Current (I): Flow of electric charge.

๐Ÿ‘‰ Unit: Ampere (A)


Voltage (V): Electric potential difference.

๐Ÿ‘‰ Unit: Volt (V)


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

๐Ÿ‘‰ Unit: Ohm (ฮฉ)

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๐Ÿ”Œ Important Formulas:


1. Ohm’s Law:

๐Ÿ”ธ V = I × R


2. Power (P):

๐Ÿ”ธ P = V × I

๐Ÿ”ธ P = I² × R

๐Ÿ”ธ P = V² ÷ R


3. Electrical Energy:

๐Ÿ”ธ E = P × t (in Joules)

๐Ÿ”ธ E = P × t ÷ 1000 (in kWh)

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๐Ÿงฎ Resistor Combinations:


Series:

๐Ÿ”ธ R_total = R₁ + R₂ + R₃ + ...


Parallel:

๐Ÿ”ธ 1/R_total = 1/R₁ + 1/R₂ + ...

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๐Ÿง  Tips to Remember:


In Series:

๐Ÿ”ธ Current is same

๐Ÿ”ธ Voltage divides


In Parallel:

๐Ÿ”ธ Voltage is same

๐Ÿ”ธ Current divides


Power increases with square of current!

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๐Ÿ“Œ Posted by: Sarthak Prakash Patil

๐Ÿ“– Sarthak’s Education Corner





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