(chatquestion)...Paragraph for Questions 13 & 14 Consider a perfectly conducting uniform disc of mass m and radius 'a' hinged in a vertical plane from its centre and free to rotate with respect to hinge. A resistance R is connected between centre of the disc and periphery by using two sliding contacts C1 & C2. A long non conducting massless string is wrapped around the disk, whose another end is attached with a block of mass m. There exists a m C2 ma? uniform horizontal magnetic field B, whose arrangement is shown in figure. Given system is released from rest at t 0. Assume friction between string and disc is sufficient so that there is no slipping between them let at any instant t, velocity of block is v, angular velocity of the disc is o and current in resistance is i. g. Find the terminal speed of the block of mass m is (Terminal speed = constant speed attained by the block after very long time) 13. mgR (A) B'a? 2mgR (B) B'a? 3mgR (C) B'a? 4mgR (D) B'a?...(Can you please solve this)

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