ELECTRICITY AND
ELECTROMAGNETISM
II B.SC PHYSICS
, ELECTRICITY AND ELECTROMAGNETISM
(For students admitted from June 2006)
UNIT 1: THE ELECTRIC FORCE AND ELECTRIC FIELD
Electric charge – Coulomb’s law – Electric field strength – Lines of force – Flux of the electric field – Gauss’s theorem
Applications of Gauss’s theorem – Field due to a point charge – Derivation of Coulomb’s law – Field along an infinite cylindr
charge – Field due to a uniform distribution of charge over a hollow spherical surface.
UNIT 2: ELECTRIC POTENTIAL AND ELECTRIC CAPACITANCE
Definition of electric potential – Zero potential – Equipotential surfaces – Potential due to a point charge – A group of point charg
a long charged wire, charged circular ring, a uniformly charged disc, a charged non-conducting sphere – The electron volt.
Capacitance: Units of capacitance – Calculation of capacitance of spherical, cylindrical and parallel plate capacitors – Energy o
charged capacitor – Energy associated with an electric field.
UNIT 3: STEADY CURRENTS
Current and current density – Equation of continuity – Ohm’s law – Electrical conductivity - Kirchoff’s laws and application
Current through a galvanometer in Wheatstone’s bridge for slight imbalance.
Chemical effects of electric current – Faraday’s laws of electrolysis – Calculation and experimental.
Magnetic Effects of Steady Currents:
Magnetic induction and definition of B – Biot-Savart experiments – Laplace’s law – Surface and line integrals of magnetic induct
– Ampere’s circuital theorem – Field at any point in between two infinite wires.
, ELECTRIC CHARGE , ELECTRIC FIELD
• Faraday in 19th century - field concept – mutual interaction between two charged bodies
• William Gilbert derived the concepts of electric charges and coined the word ‘electron’ m
‘Amber’ in Greek.
• Du Fay showed that there are two kinds of charges – experiments on ebonite, glass and fu
• Two kinds of charges exist
• Like charges repel each other
• Unlike charges attract each other
• Later Maxwell developed the concept.
• A charged body affects the space surrounding it.
• This fiel
• d affects the second charged body
• https://youtu.be/Pd9HY8iLiCA
https://www.youtube.com/watch?v=arvwTlem0h8
, • Some effects of friction in daily life :
• Effect of a comb on dry hair.
• Take of nylon dress
• People using woolen rugs or carpets when they pass through metals observe
shock.
• Cars and trucks charging when it experiences friction with air.
• To avoid this a chain is usually hung, nowadays the tires are with carbon
compound which helps to leak away charges
ELECTROMAGNETISM
II B.SC PHYSICS
, ELECTRICITY AND ELECTROMAGNETISM
(For students admitted from June 2006)
UNIT 1: THE ELECTRIC FORCE AND ELECTRIC FIELD
Electric charge – Coulomb’s law – Electric field strength – Lines of force – Flux of the electric field – Gauss’s theorem
Applications of Gauss’s theorem – Field due to a point charge – Derivation of Coulomb’s law – Field along an infinite cylindr
charge – Field due to a uniform distribution of charge over a hollow spherical surface.
UNIT 2: ELECTRIC POTENTIAL AND ELECTRIC CAPACITANCE
Definition of electric potential – Zero potential – Equipotential surfaces – Potential due to a point charge – A group of point charg
a long charged wire, charged circular ring, a uniformly charged disc, a charged non-conducting sphere – The electron volt.
Capacitance: Units of capacitance – Calculation of capacitance of spherical, cylindrical and parallel plate capacitors – Energy o
charged capacitor – Energy associated with an electric field.
UNIT 3: STEADY CURRENTS
Current and current density – Equation of continuity – Ohm’s law – Electrical conductivity - Kirchoff’s laws and application
Current through a galvanometer in Wheatstone’s bridge for slight imbalance.
Chemical effects of electric current – Faraday’s laws of electrolysis – Calculation and experimental.
Magnetic Effects of Steady Currents:
Magnetic induction and definition of B – Biot-Savart experiments – Laplace’s law – Surface and line integrals of magnetic induct
– Ampere’s circuital theorem – Field at any point in between two infinite wires.
, ELECTRIC CHARGE , ELECTRIC FIELD
• Faraday in 19th century - field concept – mutual interaction between two charged bodies
• William Gilbert derived the concepts of electric charges and coined the word ‘electron’ m
‘Amber’ in Greek.
• Du Fay showed that there are two kinds of charges – experiments on ebonite, glass and fu
• Two kinds of charges exist
• Like charges repel each other
• Unlike charges attract each other
• Later Maxwell developed the concept.
• A charged body affects the space surrounding it.
• This fiel
• d affects the second charged body
• https://youtu.be/Pd9HY8iLiCA
https://www.youtube.com/watch?v=arvwTlem0h8
, • Some effects of friction in daily life :
• Effect of a comb on dry hair.
• Take of nylon dress
• People using woolen rugs or carpets when they pass through metals observe
shock.
• Cars and trucks charging when it experiences friction with air.
• To avoid this a chain is usually hung, nowadays the tires are with carbon
compound which helps to leak away charges
