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Note for Applied Physics - Phy By Ahmad Nabeel Mirza

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Applied Physics Short notes on Physics. Written by Ahmed Nabeel 0315-4602360 12/13/2018

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APPLIED PHYSICS Contents Table of equation: ......................................................................................................................................... 2 1. Electric Charge: ..................................................................................................................................... 3 2. Properties of Electric Charge: ............................................................................................................... 3 3. Electrification: ....................................................................................................................................... 3 4. Electric Force:........................................................................................................................................ 3 5. Coulomb`s Law: ..................................................................................................................................... 4 6. Coulomb force between two charges: .................................................................................................. 4 7. Torsional Balance: ................................................................................................................................. 5 8. Field: ...................................................................................................................................................... 5 9. Electric field:.......................................................................................................................................... 6 10. Electric field strength / intensity:...................................................................................................... 6 11. Electric Potential: .............................................................................................................................. 7 12. Absolute Potential: ........................................................................................................................... 8 13. Absolute Potential at a point due to point charge: .......................................................................... 8 14. Capacitors: ...................................................................................................................................... 10 15. Relation of Capacitance of Parallel plate Capacitor:....................................................................... 11 16. Series combination of capacitor: .................................................................................................... 12 17. Parallel Combination of Capacitors:................................................................................................ 13 18. Charging & discharging of a capacitor: ........................................................................................... 15 19. Magnet: ........................................................................................................................................... 16 20. Experiment of prof. Hans Christine Arrested:................................................................................. 17 List of fig.: Fig. 1 Torsional balance................................................................................................................................. 4 Fig. 2 Torsional balance................................................................................................................................. 5 Fig. 3 Elec. Field lines b/w two similar charges ............................................................................................. 7 Fig. 4 Elec. Field lines b/w two unlike charges .............................................................................................. 7 Fig. 5 elec. Field b/w parallel plates of capacitor.......................................................................................... 7 Fig. 6 Motion of test charge against elec. field ............................................................................................. 7 Fig. 7 A point charge ..................................................................................................................................... 8 Fig. 8 Parallel Plate Capacitor...................................................................................................................... 11 Fig. 9 parallel Plate Capacitor with v meter attached................................................................................. 12 Fig. 10 Series Combination to Capacitors ................................................................................................... 12 Fig. 11 Parallel combination of Capacitors.................................................................................................. 13 Fig. 12 Charging of Capacitor ..................................................................................................................... 15 Fig. 13 Discharging of Capacitor.................................................................................................................. 16 Only Written By: Ahmed Nabeel Meerza Khan December 13, 2018 1

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APPLIED PHYSICS Fig. 14 magnetic field lines and direction ................................................................................................... 17 List of equation: Equation 1 .................................................................................................................................................... 4 Equation 2 .................................................................................................................................................... 4 Equation 3 .................................................................................................................................................... 4 Equation 4 .................................................................................................................................................... 4 Equation 5 .................................................................................................................................................... 5 Equation 6 .................................................................................................................................................... 5 Equation 7 .................................................................................................................................................... 6 Equation 8 .................................................................................................................................................... 8 Equation 9 .................................................................................................................................................... 8 Equation 10 .................................................................................................................................................. 8 Equation 11 .................................................................................................................................................. 8 Equation 12 .................................................................................................................................................. 8 Equation 13 .................................................................................................................................................. 9 Equation 14 .................................................................................................................................................. 9 Equation 15 .................................................................................................................................................. 9 Equation 16 .................................................................................................................................................. 9 Equation 17 ................................................................................................................................................ 10 Equation 18 ................................................................................................................................................ 10 Equation 19 ................................................................................................................................................ 11 Equation 20 ................................................................................................................................................ 11 Equation 21 ................................................................................................................................................ 11 Equation 22 ................................................................................................................................................ 11 Equation 23 ................................................................................................................................................ 11 Equation 24 ................................................................................................................................................ 11 Equation 25 ................................................................................................................................................ 12 Equation 26 ................................................................................................................................................ 12 Equation 27 ................................................................................................................................................ 12 Equation 28 ................................................................................................................................................ 12 Equation 29 ................................................................................................................................................ 12 Equation 30 ................................................................................................................................................ 13 Equation 31 ................................................................................................................................................ 13 Equation 32 ................................................................................................................................................ 13 Equation 33 ................................................................................................................................................. 14 Equation 34 ................................................................................................................................................ 18 Only Written By: Ahmed Nabeel Meerza Khan December 13, 2018 2

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APPLIED PHYSICS 1. Electric Charge: History: In 1600 BC Gilbert Studied Electric charge latter Benjamin Franklin (1706-1790) explained it and worked on it. Old Definition: Two bodies are said to be electrically charged bodies when forces of attraction or repulsion generates between them. Modern Definition: The deficiency or the excess of electrons in an element makes a body electrically charged. 2. Properties of Electric Charge: i. ii. iii. iv. There are two types of charged bodies i.e. :( Positive & negative Charged bodies). Similar charges always repeal each other. Unlike charges always attract each other. The smallest charge on any of the charged body is 1.60 x 10-19C or always the multiple of it. 3. Electrification: The phenomenon which makes a body electrically charged is called electrification. There are the three methods of it: i. Induction (Without the physical contact). ii. Conduction (with the physical contact) iii. Friction. 4. Electric Force: The force that holds the positive & negative charges together to makeup atoms & molecules is known as electric force. Only Written By: Ahmed Nabeel Meerza Khan December 13, 2018 3

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