AP EAMCET · PHYSICS · Magnetic Effects of Current
In a co-axial, straight cable, the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero
- A outside the cable
- B inside the inner conductor
- C inside the outer conductor
- D in between the two conductors
Answer & Solution
Correct Answer
(A) outside the cable
Step-by-step Solution
Detailed explanation
Since the current carried by the outer and inner are equal and in opposite direction, magnetic field produced by the cylinders at a point P(distance r from central axis) is ⇒B→outer=μo4πidl→×r→r3…
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