JEE Main 2022 | Moving Charge And Magnetism | Gatiman Aavesh Aur Chumbakatva | Bio-Savart's Law

JEE Mains 2020 - 30 Days Revision | Moving Charge & Magnetism - Most Important Questions | Physics

Force on moving charge in magnetic field ,Ampere circuital law

JEE Mains 2020 - 30 Days Revision | Force On A Moving Charge - Most Important Questions | Physics

Which of the following gives the value of magnetic field according to, Biot-Savart’s law

[JEE (Main)-2016] 39a, The point represented by 2 + i in the Argand plane moves 1 unit eastwards, then 2 units northwards and finally from there 2/2 units in the south-westwards direction. Then its new position in the Argand plane is at the point represented by (4)-2-2i

A point charges Q is moving in a circular orbit of radius R in the x-y plane with an angular velocity omega . This can be considered as equivalent to a loop carrying a steady current (Q omega)/(2 pi) . S uniform magnetic field along the positive z-axis is now switched on, which increases at a constant rate from 0 to B in one second. Assume that the radius of hte orbit remains constant. The application of hte magnetic field induces an emf in the orbit. The induced emf is defined as the work done by an induced electric field in moving a unit positive charge around a closed loop. It si known that, for an orbiting charge, the magnetic dipole moment is proportional to the angular momentum with a porportionality constant lambda . The charge in the magnetic dipole moment associated with the orbit. at the end of the time interval of hte magnetic field charge, is

A point charges Q is moving in a circular orbit of radius R in the x-y plane with an angular velocity omega . This can be considered as equivalent to a loop carrying a steady current (Q omega)/(2 pi) . S uniform magnetic field along the positive z-axis is now switched on, which increases at a constant rate from 0 to B in one second. Assume that the radius of hte orbit remains constant. The application of hte magnetic field induces an emf in the orbit. The induced emf is defined as the work done by an induced electric field in moving a unit positive charge around a closed loop. It si known that, for an orbiting charge, the magnetic dipole moment is proportional to the angular momentum with a porportionality constant lambda . The magnitude of the induced electric field in the orbit at any instant of time during the time interval of the mangnetic field change is

Match the following : {:(" Column I"," Column II"),("(A) Steady electric field","(p) Can accelerate a stationary charge"),("(B) Steady magnetic field","(q) Can accelerate a moving charge"),("(C) Time varying magnetic field","(r) Can change the speed of a charge"),("(D) Induced electric field","(s) Forms closed loops"):} ,

When charge is at rest then it creates only electric field not the magnetic field. A moving charge generates electric as well as magnetic field around it. If charge is moving with constant velocity then electric and magnetic field do not change with time, hence, it cannot produce electromagnetic wave. When charge is accelerated then time-varying electric and magnetic fields are created and thus electromagnetic wave is produced by accelerated charge. We know that the current-carrying wire creates magnetic field around it. If alternating current is flowing through the wire then it creates variable magnetic field around it and thus starts radiating electromagnetic waves. When a charged capacitor is connected across an inductor then charge starts oscillating between the plates of the capacitor. Normally one plate of the capacitor is connected to Earth and the other plate is connected to an antenna. Antenna radiates electromagnetic wave. Hertz successfully produced electromagnetic waves using such LC oscillator. Speed of electromagnetic wave in vacuum is constant and equal to 3 xx 10^8 m/s. But inside a medium the speed changes according to electrical and magnetic properties of the medium. IF mu_r and epsi_r are the relative permeability and relative premittivity of the medium then speed of light in that medium can be written as