AP EAMCET202422 May 2024Evening ShiftPhysicsElectromagnetic InductionActual
A metallic wire loop of side (l) 0.1 ~m and resistance of 1 is moved with a constant velocity in a uniform magnetic field of 2 Wm ⁻² as shown in the figure. The magnetic field is perpendicular to the plane of the loop. The loop is connected to a network of resistors. The velocity of loop so as to have a steady current of 1 mA in loop is
Options
- A0.67 ~cm ~s ⁻¹
- B2 ~cm ~s ⁻¹
- C3 ~cm ~s ⁻¹
- D4 ~cm ~s ⁻¹
Correct answer
B. 2 ~cm ~s ⁻¹
Step-by-step solution
1=0.1 ~m , R =1 , ~B =2 Wm ⁻², I =1 ~mA =10⁻³ ~A Motional emf, E = Bvl aligned & R_e= 6 6 6+6 +1=4 & I= E R_e = B v l R_e & 10⁻³= 2 v 0.1 4 & v=2 ~cm / s aligned