Two parallel vertical metallic rails {AB} and {CD} are separated by 1 {m}. They are connected at the two ends by resistances {R}_{1} and {R}_{2} as shown in the figure. A horizontal metallic bar {PQ} of mass 0.2 {kg} sides with out friction, vertically down the rails under the action of gravity. There is uniform horizontal magnetic field of 0.6 {T}, which is perpendicular to plane of the rails. It is observed that when the terminal velocity attained, the power dissipated in resistance {R}_{1} and {R}_{2} are 0.76 {W} and 1.2 {W}, respectively. Find the terminal velocity ( in m \/ s) of the bar. (Take g=9.8 {m} \/ {s}^{2})

Question

Two parallel vertical metallic rails  {AB} and  {CD} are separated by 1  {m}. They are connected at the two ends by resistances  {R}_{1} and  {R}_{2} as shown in the figure. A horizontal metallic bar  {PQ} of mass 0.2  {kg} sides with out friction, vertically down the rails under the action of gravity. There is uniform horizontal magnetic field of 0.6  {T}, which is perpendicular to plane of the rails. It is observed that when the terminal velocity attained, the power dissipated in resistance  {R}_{1} and  {R}_{2} are 0.76  {W} and 1.2  {W}, respectively. Find the terminal velocity ( in m \/ s) of the bar. (Take g=9.8  {m} \/  {s}^{2})

Examsnet · Accepted Answer

Correct Answer is :      00001.00

JEE Advanced 2020 Full Test 7 Paper 1