Related InterviewSolutions

• In the previous problem, what will be force with which system moves? `(Use (sqrt2) =1.4)`A. `3.05N`B. `4.0 N`C. `0.5 N`D. `1.0 N`
• Suppose the `19 Omega` resistor of the previous problem is disconnected. Find the current through `P_2 Q_2` in the two situations (a) and (b) of that problem.A. zeroB. 3 mAC. 1 mAD. None of these
• In a cylindrical region of radius a, magnetic field exists along its axis but the direction of magnetic field is opposite in the four quadrants of the region as shown in Fig. A or AB rotates with its end A at the centre of magnetic field and other end B slides on a smooth wire at the periphery of the region of magnetic field. At t = 0 the rod was situated along the +X direction. Find and plot the time dependence of the current in the resistance R when rotates with a constant angular acceleration `(alpha)`A. B. C. D.
• In a cylindrical region of radius a, magnetic field exists along its axis but the direction of magnetic field is opposite in the four quadrants of the region as shown in Fig. A or AB rotates with its end A at the centre of magnetic field and other end B slides on a smooth wire at the periphery of the region of magnetic field. At `t = 0` the rod was situated along the +X direction. Find and plot the time dependence of the current in the resistance R when rod rotates with a constant angular velocity `(omega)`.A. B. C. D.
• A rectangular wire frame of dimensions `(0.25 xx 2.0 m)` and mass 0.5 kg falls from a height 5m above a region occupied by uniform magnetic field of magnetic induction 1 T. The resistance of the wire frame is `1/8 (Omega)`. Find time taken to completely enter into the field isA. 0.2sB. 1sC. 2.2sD. `sqrt((1)/(5))s`
• A uniform conducting ring of mass `pi` kg and radius 1 m is kept on smooth horizontal table. A uniform but time varying magnetic field `B = (hat (i) + t^(2) hat (j))T` is present in the region, where t is time in seconds. Resistance of ring is `2 (Omega)`. Then Net magnetic field (in Newton) on conducting ring as function of time isA. `2 pi^(2)t`B. `2 pi^(2)t^(2)`C. `2 pi^(2)t^(3)`D. zero
• A uniform conducting ring of mass `pi` kg and radius 1 m is kept on smooth horizontal table. A uniform but time varying magnetic field `B = (hat (i) + t^(2) hat (j))T` is present in the region, where t is time in seconds. Resistance of ring is `2 (Omega)`. Then Heat generated (in kJ) through the ring till the instant when ring start toppling isA. `(1)/(3 pi)`B. `(2)/(pi)`C. `(2)/(3 pi)`D. `(1)/(pi)`
• A uniform conducting ring of mass `pi` kg and radius 1 m is kept on smooth horizontal table. A uniform but time varying magnetic field `B = (hat (i) + t^(2) hat (j))T` is present in the region, where t is time in seconds. Resistance of ring is `2 (Omega)`. Then Time (in second) at which ring start toppling isA. `(10)/(pi)`B. `(20)/(pi)`C. `(5)/(pi)`D. `(25)/(pi)`
• Consider the situation shown in . The wire PQ has a negligible resistance and is made to slide on the three rails with a constant speed of `5 cm s^(-1)` . Find the current in the `10 Omega` resistor when the switch S is thrown to (a) the middle rail (b) the bottom rail. A. zeroB. 2 mAC. 1 mAD. None of these
• A stationary circular loop of radius a is located in a magnetic field which varies with time from `t = 0 to t = T` according to law `B = B_(0) t(T - t)`. If plane of loop is normal to the direction of field and resistance of the loop is R, calculate amount of heat generated in the loop during this interval.A. `(pi^(2)a^(4)B_(0)^(2)T^(3))/(3R)`B. `(pi^(2)a^(4)B_(0)^(2)T^(3))/(R)`C. `(3pi^(2)a^(4)B_(0)^(2)T^(3))/(R)`D. None of these