Revison Notes Physics Class 10 Chapter Eletricity

Topics: Electric charge, Electric current, Electricity Pages: 2 (294 words) Published: January 10, 2011
Grade 10 Electricity
I Q t

I = current Q = net charge flowing t = time
1A 1C 1s

Unit: Q = Coulomb (C) I = Ampere (A) t = Second (s) Potential difference

 Work done to move a unit charge from one point to another V W Q

Unit  Volt 1 Volt
1 joule 1 coulomb 1V 1J C

Ohm’s law Current potential difference V I V = IR (R = resistance) Unit (R)  1 1V 1A


Factors on which resistance depends 1. 2. R R l, when A and material constant l = length A, when l and material constant A = perpendicular cross-section


l A l A


= resistivity)

Unit ( )  m Resistance in a series connection R = R1 + R2 + R3 + … + Rn Resistance in parallel 1 R 1 R1 1 R2 ... 1 Rn

Heating Effect of current Electric energy = VIt
Heat, H VIt I 2 Rt

Application Electric iron, toaster, fused wire Fused wire: a low-melting point wire connected in series with electric devices for safety. Electric power P VI I R

V2 R

Unit – 1 kWh = 3.6 × 106 J 1 W = 1V × 1A Definitions Potential difference: The potential difference between two separate points is defined as the work done to move a unit positive charge from one point to another.

Resistivity: Resistivity of a substance is equal to the resistance of a unit square of that substance. Law Ohm’ law: Under constant physical conditions (i.e., constant temperature, pressure etc.), the current flowing through a conductor is directly proportional to the potential difference across the conductor.

Contribute to this Revision Note: If you find anything of importance missing from this note, email it to us at, and we’ll add it to this note under your name!

Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • Physics Ib Chapter 4 Notes Essay
  • Chapter 10 Class Notes Essay
  • Essay about Physics 2 Lab chapter 21
  • Physics Notes Essay
  • Physics Test Notes Essay
  • Year 10 physics summary Essay
  • Essay on Chapter 10 Notes
  • Notes Chapter 10 Christianity Essay

Become a StudyMode Member

Sign Up - It's Free