The magnetic field lines inside a long current-carrying solenoid are near-

a)
Straight

b)
Circular

c)
Elliptical

d)
Parabolic

Correct answer is option 'A'. Can you explain this answer?

Question

The magnetic field lines inside a long current-carrying solenoid are near-a)Straightb)Circularc)Ellipticald)ParabolicCorrect answer is option 'A'. Can you explain this answer?

Answer

The magnetic field inside a long straight current-carrying solenoid is uniform which is represented by parallel lines. Hence it is same at all points.

This property is utilised to magnetise a piece of magnetic material like soft iron when placed inside the coil.

Answer

Answer

D is correct only if the length of solenoid is greater than its radius

Answer

This is because the magnetic field in a solenoid works like that of a bar magnet.
It is same at all points inside, but outside it will change depending on factors like distance, etc.

Answer

Magnetic Field Lines Inside a Long Current-Carrying Solenoid

Introduction:
A solenoid is a long coil of wire that is tightly wound in the form of a cylinder. When an electric current flows through the solenoid, it creates a magnetic field around it. The behavior of magnetic field lines inside the solenoid is determined by the structure and arrangement of the wire turns.

Explanation:
The magnetic field lines inside a long current-carrying solenoid are near straight. This can be understood by considering the following points:

1. Uniform Magnetic Field: Inside a solenoid, the magnetic field is strong and uniform along its axis. This is because the magnetic field created by each individual turn of the wire adds up to form a net magnetic field along the axis. The magnetic field lines are parallel to each other, indicating a uniform magnetic field.

2. Conservation of Field Lines: Magnetic field lines are continuous and closed loops. They always form closed paths. Since there is no magnetic monopole, the field lines must form closed loops. Thus, the field lines inside the solenoid must be continuous and closed.

3. Field Lines Outside the Solenoid: Outside the solenoid, the magnetic field lines diverge and spread out. This is because the magnetic field created by each turn of the wire cancels out the magnetic field of neighboring turns, resulting in a weaker and less uniform magnetic field outside the solenoid.

4. Uniform Field Strength: The magnetic field strength inside the solenoid is approximately constant. This is because the magnetic field lines are straight and parallel, indicating a uniform field strength throughout the solenoid.

5. Practical Considerations: In an ideal scenario, the magnetic field lines inside a solenoid would be perfectly straight. However, in real-world situations, there may be slight deviations due to imperfections in the solenoid's structure or external factors. Nonetheless, the overall behavior of the magnetic field lines inside a solenoid is still predominantly straight and parallel.

Conclusion:
In conclusion, the magnetic field lines inside a long current-carrying solenoid are near straight. This is due to the uniform magnetic field created by the arrangement of wire turns and the absence of magnetic monopoles. Understanding the behavior of magnetic field lines inside a solenoid is essential in various applications, such as electromagnets and inductors.

Answer

Why prove that plz

Answer

Zero

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