JIPMER2004PhysicsMagnetic Effects of Current
20 ampere current is flowing in a long straight wire. The intensity of magnetic field at a distance 10 cm from the wire will be
Options
- A2 10⁻⁵ ~Wb / m ^2
- B9 10⁻⁵ ~W / m ^2
- C4 10⁻⁵ ~Wb / m ^2
- D6 10⁻⁵ ~Wb / m ^2
Correct answer
C. 4 10⁻⁵ ~Wb / m ^2
Step-by-step solution
Here: i=20 ~A , r=10 ~cm =0.1 ~m Intensity of magnetic field produced due to straight current carrying wire is B= ₀ 4 2 i r aligned & =10⁻⁷ 2 20 0.1 & =4 10⁻⁵ ~Wb / m ^2 aligned