Chapter-4|Moving Charges and Magnetism| NCERT 12th Physics: Magnetic Dipole Moment of a Revolving Electron (For Hydrogen Like Atom): Let an electron(e⁻) is revolving in a loop(atom), mass m, velocity v and radius r. When electron (e⁻) revolve around nucleus, it constitute a current. Since,  q= It, therefore I= q/t = e⁻/t.       This […]

Chapter-4|Moving Charges and Magnetism| NCERT 12th Physics: Circular Current Loop as a Magnetic Dipole: Main Topic: A current loop behaves as a magnetic dipole Magnetic field lines are always from South(S) to North(N). If we look at the upper face, current is showing  clockwise, so it has South polarity. If we look at lower face

Chapter-4|Moving Charges and Magnetism| NCERT 12th Physics: Force Between Two Parallel Current Carrying Conductors: Let we consider two parallel infinite long straight conductors.     Note: Two linear parallel conductors carrying current in the same direction attract each other, while carrying in opposite direction they repel to each other.     Definition of Ampere:  

Chapter-4|Moving Charges and Magnetism| NCERT 12th Physics: Magnetic Force on a Current Carrying Conductor (In a Uniform Magnetic Field): We know that a moving charge particle experiences a magnetic force in a magnetic field and the value of force is F= q(V×B). A current carrying wire has a chargers moving inside it opposite direction of

Chapter-4|Moving Charges and Magnetism| NCERT 12th Physics: Cyclotron: It is device used to accelerate charged particle like proton and alpha-particle etc. to very high energies. It was invented by E.O. Lawrence and M.S Livingston in 1934. Principle: A charged particle can be accelerated to very high energy by making it pass through a moderate electric

Chapter-4|Moving Charges and Magnetism| NCERT 12th Physics: Force on a Moving Charge in a Uniform Magnetic and Electric Field (Lorentz Force):   When we combine these two forces then we find Lorentz Force, If we adjust the value of E and B such that magnitude of two forces are equal and opposite in direction then

Chapter-4|Moving Charges and Magnetism| NCERT 12th Physics: Motion(Path) of Charged Particle in Magnetic Field: We know that in circular motion moving object motion will be balance by centripetal force. Some Important Concept:

Chapter-4|Moving Charges and Magnetism| NCERT 12th Physics: Force on a Moving Charge in a Uniform Magnetic Field:   There is no Force Act on Charged Particle:   Direction of Magnetic Force: By following method we can find the direction of magnetic force.   Note: (I) Firstly put your thumb, fore finger and middle finger perpendicular