MHT CET20225 Aug 2022Morning ShiftPhysicsElectromagnetic InductionActual
Two coils P and S have a mutual inductance of 3 10⁻³ H . If the current in the coil, P is I=20 (50 t) A , then the maximum value of the e.m.f. induced in coil S is
Options
- A15.70 ~V
- B9.42 ~V
- C3.14 ~V
- D6.25 ~V
Correct answer
B. 9.42 ~V
Step-by-step solution
The correct option is (B). Concept: Flux associated among the coils is = MI and the induced emf is given by E =- d dt . Therefore, E =- M di dt . Given, I =20 (50 t ) and M =3 10⁻³ H , Therefore, E =- M di dt . Given, I =20 (50 t ) and M =3 10⁻³ H , therefore E =- M di dt . Given, I =20 (50 t ) and M =3 10⁻³ H , therefore E= (-3 10⁻³ H 50 20 ) (50 t ) A The maximum emf is given by |E₀ |=3 10⁻³ 50 20 ~V =9.42 ~V