JIPMER2015PhysicsMagnetic Effects of Current
Two long straight wires, each carrying an electric current of 5 A, are kept parallel to each other at a separation of 2.5 cm. Find the magnitude of the magnetic force experiment by 10 cm of a wire.
Options
- A4.0 10⁻⁴ ~N
- B3.5 10⁻⁶ ~N
- C2.0 10⁻⁵ ~N
- D2.0 10⁻⁹ ~N
Correct answer
C. 2.0 10⁻⁵ ~N
Step-by-step solution
The field at the site of one wire due to the other is aligned B & = ₀ i 2 d = 2 10^7 5.0 2.5 10⁻² & =4.0 10⁻⁵ ~T aligned The force experienced by 10 cm of this wire due to other is aligned F & =i l B & =(5.0) (10 10⁻² ) (4.0 10⁻⁵ ) & =2 10⁻⁵ ~N aligned