NEST2011PhysicsMagnetic Effects of Current
The inner wire of a straight coaxial cable has radius a while the outer wire has radii 3 a and 5 a . The cable carries equal and opposite currents of magnitude i (distributed uniformly across the cross-section) on the inner and outer wires (see figure). The magnitude of the magnetic field at point P inside the cable at a distance 4 a from the axis is
Options
- A9 ₀ i 128 a
- B7 ₀ i 128 a
- C23 ₀ i 128 a
- D₀ i 32 a
Correct answer
A. 9 ₀ i 128 a
Step-by-step solution
No solution available.