Скачать или смотреть Conceptual Questions| Chapter 12 | Electromagnetism | Physics 11th | National Book Foundation 2025

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A horizontal power line carries a current of 600A from south to north. Earth’s magnetic field 5×〖10〗^(-5) T is directed toward the north and inclined downward at 70° to the horizontal. Find the magnitude and direction of the magnetic force on 100m of the line due to Earth’s magnetic field.
A proton is accelerated in a cyclotron in which the magnetic induction is 0.75Wb/m^2. Find the cyclotron frequency.
A velocity selector consists of electric and magnetic fields described by the expression E ⃗=Ek ̂ and B ⃗=Bj ̂. With B=18.0mT. Find the value of E such that electron of energy 850eV moving in the negative x direction is undeflected.
Two long straight parallel wires are 0.6m apart and carry current 4A and 8A. Find the point lying between two wires at perpendicular distance where resultant magnetic field will be zero (neutral point).
A coil of wire has 100 loops. Each loop has an area of 2.0×〖10〗^(-3) m^2. A magnetic field is perpendicular to the surface of each loop at all times. If the magnetic field is changed from 0.2T to 0.6T in 0.1s, find the average emf induced in the coil during this time.
A 2m long wire carrying a current of 15A is placed in a uniform magnetic field of 0.50T. If the wire makes an angle of 60° with the direction of magnetic field, find the magnitude of the magnetic force acting on the wire.
Data:
L=2m
A particle carrying a charge of 1μC and moving with velocity of 2×〖10〗^6 m/s enter in a magnetic field of 0.5T at angle of 60° with the field. Calculate the magnitude of magnetic force acting on it.
A single circular loop has radius 2cm. The plane of the loop lies at 40° to a uniform magnetic field of 0.2T. Find the magnitude of the magnetic flux through the loop.
Find the magnetic force acting on a charged particle of charge 2μC in a magnetic field of 2T acting in y-direction when particle velocity is (2i ̂+3j ̂)×〖10〗^6 ms^(-1).