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Recent questions tagged telegram-168

(chatquestion)...done in rotating the cos by op the needle in the displaced postion (3) 2 (2) J3w (4) W A current i, is flowing through an L-R circuit of time constant t The source of current is switched off at time t= 0. Let r be the value of (-di/dt) at time t=0, Assuming this rate to be constant, the current wll reduce to zerO in a time interval of Q.75 [1] to [2] et, [4] Q.76 A conducting rod AB of length /= 1 m is moving at a velocity v = 4 m/s making an angle 30 vth tn kannn uniform magnetic field B = 2T exists in a direction perpendiuclar to the plane of motion. Then C-C X X X X X [4] V-V=4V [3] Ve-VA= 8V [2] VA- Vg = 4 V [1]V- Ve = 8V In the circuit shown in fig. The jockey J is being pulled towards right so that the resistance in the circitis increasing. Its value at some instant is 5 Q. The current in the circuit at this instant will be 77 lellll [2] less than 4 A [114 A [4] may be less than or more than 4 A depending on the value of L ntont volocihuyout of a uniform [3] more than 4 A

asked Jan 20, 2020 by balaji.thirumalai

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