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12th Physics || CH 4 - गतिमान आवेश और चुंबकत्व Moving Charge & Magnetism || L1 By Gopal Sir ?

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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)

Which one of the following modifications may increase the senstivity of moving coil galvanometer? 1^(st) Way : By using spring of smaller torsion constant. 2^(nd) Way : By using a smaller coil 3^(rd) Way : By using a stronger magnet 4^(th) Way: By using a coil having fewer number of turns.

A charge of 4.0 muC is moving with a velocity of 4.0 times 10^6ms^(–1) along the positive y-axis under a magnetic field vec B of strength (2 hat k) T. The force acting on the charge is x hat i N . The value of x is __.

A conducting rod PQ of length L = 1.0 m is moving with a uniform speed v = 2.0 m s^(-1) in a uniform magnetic field B = 4.0 T directed into the plane of the paper. A capacitor of capacity C = 10muF is connected as shown in , then