MHT CET20228 Aug 2022Morning ShiftPhysicsElectromagnetic InductionActual
When a current I flows through a coil, it stores the energy E₁ in it. Now the current is reduced to l 2 , the energy stored in the coil becomes E₂ . The change in the energy is
Options
- AE₁ 4
- B3 E₁ 4
- C4 E₁ 3
- DE₁ 2
Correct answer
B. 3 E₁ 4
Step-by-step solution
Energy stored in the coil E I^2 E₁ I^2 and E₂ ( I 2 )^2 On taking the ratio: E₁=4 E₂ The change in energy is E₁-E₂=E₁- E₁ 4 = 3 E₁ 4