BITSAT2013PhysicsElectromagnetic InductionActual
Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross-sectional area A =10 ~cm ² and length =20 ~cm . If one of the solenoid has 300 turns and the other 400 turns, their mutual inductance is ( ₀=4 10⁻⁷ TmA ⁻¹ )
Options
- A2.4 10⁻⁵ H
- B4.8 10⁻⁴ H
- C4.8 10⁻⁵ H
- D2.4 10⁻⁴ H
Correct answer
D. 2.4 10⁻⁴ H
Step-by-step solution
aligned M &= ₀ ~N ₁ ~N ₂ ~A &= 4 10⁻⁷ 300 400 100 10⁻⁴ 0.2 &=2.4 10⁻⁴ H aligned #