गतिमान आवेश तथा चुंबकत्व (Moving Charge & Magnetism)| UP Board Exam 2022 | Physics | भौकाल Batch

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

Class 12 Physics | Chapter 4 Moving Charges and Magnetism | Important Questions & Quick Revision | Part 1

Class 12 Physics | Chapter 4 Moving Charges and Magnetism | Important Questions & Quick Revision | Part 2

Class 12 Physics | Chapter 4 Moving Charges and Magnetism | Important Questions & Quick Revision | Part 3

Using method of dimensions, establish relation among given physical quantities : (a) Heat H produced in a wire depends on current i flowing through it, its resistance R and time t . (b) The magentic field F_(m) acting on a moving charged particle in magnetic field depends on charge on particle q , its speed v and magnetic field B Dimensional formulae : R : ML^(2) T^(-3) A^(-2), B : MT^(-2) A^(-1)

Class 12 Physics (Hindi)| Chapter 1 वैद्युत आवेश तथा क्षेत्र | Important Questions | UP Boards

(a) Magnetic field lines show the directions (at every point) which a small magnetised needle takes up (at that point). Do the magnetic field lines also represent the lines of force of a moving charged particle at every point? (b) Magnetic field lines can be entirely confined within the core of a toroid, but not within a straight solenoid. Why? (c) If magnetic monopoles existed, how would Gauss's law of magnetism be modified? (d) Does a bar magnet exert a torque on itself due to its own field? Does one element of a current carrying wire exert a force on another element of the same wire? (e) Magnetic field arises due to charges in motion. Can a system have magnetic moment even though its net charge is zero? (f) Magnetic force is always normal to the velocity of a charge and therefore does no work. An iron nail held near a magnet, when released, increases its kinetic energy as it moves to cling to the magnet. What agency is responsible for this increase in kinetic energy if not the magnetic field?