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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A metal bar AB can slide on two parallel thick metallic rails separated by a distance l. A resistance R and an inductance L are connected to the rails as shown in the figure. A long straight wire carrying a constant current I0 is placed in the plane of the rails and perpendicular to them as shown. The bar AB is held at rest at a distance x0 from the long wire. At t=0, it is made to slide on the rails away from wire. Answer the following questions. (a) Find a relation among i,didtanddϕdt, where i is the current in the circuit and ϕ is the flux of the megnetic field due to the long wire through the circuit. (b) It is observed that at time t=T, the metal bar AB si at a distance of 2×0 from the long wire and the resistance R carries a current (i1). Obtain an expression for the net charge that has flown through riesistance R form t=0 to t=T. (c) THe bar is suddenly stopped at time T. THe current through resistance R is found to be i14 at time 2T. Find the value of LR in terms of hte other given quantities.

A metal bar AB can slide on two parallel thick metallic rails separated by a distance l. A resistance R and an inductance L are connected to the rails as shown in the figure. A long straight wire carrying a constant current I0 is placed in the plane of the rails and perpendicular to them as shown. The bar AB is held at rest at a distance x0 from the long wire. At t=0, it is made to slide on the rails away from wire. Answer the following questions. (a) Find a relation among i,didtanddϕdt, where i is the current in the circuit and ϕ is the flux of the megnetic field due to the long wire through the circuit. (b) It is observed that at time t=T, the metal bar AB si at a distance of 2×0 from the long wire and the resistance R carries a current (i1). Obtain an expression for the net charge that has flown through riesistance R form t=0 to t=T. (c) THe bar is suddenly stopped at time T. THe current through resistance R is found to be i14 at time 2T. Find the value of LR in terms of hte other given quantities.

a or b c or d E = 120 V In the circuit shown in fig In the circuit shown in Figure Initially the 900μF capacitor is charged to 100 V and the 100μF capacitor is uncharged in Fig. Then switch S2 is closed for time t1 is at higher potential? (c) What is the potential difference Vcd across the inductor L? (d) Which point is at steady state. if R1 = R2= R3 =R and the current through each resistor is i. Find the currents through the resistors immediately after the switch S is opened. R1 = 30.0 Ω R2 =50.0Ω and L = 0.200 H. Switch S is closed at t=0. Just after the switch is closed.(a) What is the potential difference Vab across the inductor R1? (b) Which point