KCET2022PhysicsElectromagnetic Induction
A magnetic field of flux denisty 1.0 ~Wb ~m ⁻² acts normal to a 80 turn coil of 0.01 ~m ^2 area. If this coil is removed from the field in 0.2 ~s , then the emf induced in it is
Options
- A8 ~V
- B0.8 ~V
- C5 ~V
- D4 ~V
Correct answer
D. 4 ~V
Step-by-step solution
Given, magnetic flux density, B=1 ~Wb / m ^2 Number of turns, N=80 Area of coil, A=0.01 ~m ^2 t=0.2 ~s According to Faraday's law of electromagnetic induction, induced emf aligned |e| & = N t =N B A t [ =B A] & = 80 1 0.01 0.2 =4 ~V aligned