Manipal MET2016PhysicsMagnetic Effects of Current
A solenoid of 2.5 m length and 2.0 cm diameter possesses 10 turns per cm. A current of 0.5 A is flowing through it. The magnetic induction at axis inside the solenoid is
Options
- A2 10⁻⁴ ~T
- B2 10⁻⁵ ~T
- C2 10⁻⁶ ~T
- D2 10⁻⁷ ~T
Correct answer
A. 2 10⁻⁴ ~T
Step-by-step solution
The magnetic induction along the axis of solenoid B= ₀ n I where, n= number of turns per unit length and I= current ₀ 4 =10⁻⁷ ~T / A array ll & ₀=4 10⁻⁷ ~T / A Given, & n=10 ~cm ⁻¹=1000 ~m ⁻¹ array I=0.5 ~A B=4 10⁻⁷ 1000 0.5=2 10⁻⁴ ~T