MHT CET20243 May 2024Evening ShiftPhysicsElectromagnetic InductionActual
Two coils are kept near each other. When no current passess through first coil and current in the 2^ nd coil increases at the rate 10 ~A / s , the e.m.f. in the 1^ x coil is 20 mV . When no current passes through 2^ nd coil and 3.6 A current passes through 1^8 coil the flux linkage in coil 2 is
Options
- A1.2 10⁻³ ~Wb
- B1.8 10⁻³ ~Wb
- C3.6 10⁻³ ~Wb
- D7.2 10⁻³ ~Wb
Correct answer
D. 7.2 10⁻³ ~Wb
Step-by-step solution
The e.m.f. induced in first coil, aligned e ₁ & = M dI dt M & = e dt dI ₂ ...(i) aligned Flux linkage of coil, = MI aligned & = ( e dt dI ) I ₁ & = 20 10⁻³ 10 3.6 & =7.2 10⁻³ ~Wb aligned . . [From(i)]