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In a coaxial, 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 conductor
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
In a coaxial, straight cable, the central conductor and the outer cond...
Construct an Ampere’s loop in the concerned regions to see the value of ip.
At a pont outside the co-axial tube at a diatance R from the central axis consider a circular path.
Then from Amperes Law closed integral of B.dl=μ0I(net)
the net current is zero as the current in the two cables flow in opposite directions.
Then from Amperes Law closed integral of B.dl=μ0I(net)
the net current is zero as the current in the two cables flow in opposite directions.
therefore Magnetic field is zero outside
Most Upvoted Answer
In a coaxial, straight cable, the central conductor and the outer cond...
To understand why the magnetic field is zero outside the cable, let's break down the scenario step by step:
**Magnetic Field Outside the Cable (Option A):**
- When equal currents flow in opposite directions in the central and outer conductors of a coaxial cable, they create magnetic fields that cancel each other out in the region outside the cable.
- The magnetic fields produced by the currents in the central conductor and the outer conductor have opposite directions due to the opposite directions of the currents.
- According to the right-hand rule for magnetic fields, the magnetic fields produced by the currents in the central and outer conductors will have opposite directions and will cancel each other out outside the cable.
- As a result, the net magnetic field outside the cable is zero.
In conclusion, the magnetic field outside the coaxial cable is zero because the magnetic fields produced by the equal currents flowing in opposite directions in the central and outer conductors cancel each other out. This phenomenon highlights the importance of understanding the principles of electromagnetism in the context of coaxial cables, which are commonly used in various applications such as telecommunications and electronics.
**Magnetic Field Outside the Cable (Option A):**
- When equal currents flow in opposite directions in the central and outer conductors of a coaxial cable, they create magnetic fields that cancel each other out in the region outside the cable.
- The magnetic fields produced by the currents in the central conductor and the outer conductor have opposite directions due to the opposite directions of the currents.
- According to the right-hand rule for magnetic fields, the magnetic fields produced by the currents in the central and outer conductors will have opposite directions and will cancel each other out outside the cable.
- As a result, the net magnetic field outside the cable is zero.
In conclusion, the magnetic field outside the coaxial cable is zero because the magnetic fields produced by the equal currents flowing in opposite directions in the central and outer conductors cancel each other out. This phenomenon highlights the importance of understanding the principles of electromagnetism in the context of coaxial cables, which are commonly used in various applications such as telecommunications and electronics.
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In a coaxial, straight cable, the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zeroa)outside the cable b)inside the inner conductorc)inside the outer conductord)in between the two conductorCorrect answer is option 'A'. Can you explain this answer?
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