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What defines a solenoid in the context of magnetic fields?
  • a)
    A coil of a few circular turns
  • b)
    A long, straight wire
  • c)
    A coil of many circular turns of insulated wire
  • d)
    A single loop of wire
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
What defines a solenoid in the context of magnetic fields?a)A coil of...
In the context of magnetic fields, a solenoid is defined as a coil of many circular turns of insulated wire. Solenoids are crucial components in electromagnets and various electrical devices due to their ability to generate strong and uniform magnetic fields.
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What defines a solenoid in the context of magnetic fields?a)A coil of...
Definition of a Solenoid
A solenoid is a specific type of electromagnetic device that generates a magnetic field when an electric current passes through it. Its structure and design play a crucial role in its functionality.
Characteristics of a Solenoid:
- Coil of Many Circular Turns: A solenoid consists of a long coil made up of many circular turns of insulated wire. This configuration enhances the magnetic field produced when current flows through the coil.
- Magnetic Field Generation: When an electric current flows through the solenoid, it creates a magnetic field that is concentrated along the axis of the coil. The strength of this magnetic field is proportional to the number of turns in the coil and the amount of current passing through it.
- Uniform Magnetic Field: Inside a long solenoid, the magnetic field is relatively uniform and parallel to the axis of the coil. This makes solenoids useful in various applications, including electromagnets, inductors, and switches.
- Comparison with Other Options:
- A coil of a few circular turns (Option A) does not produce a significant magnetic field.
- A long, straight wire (Option B) generates a magnetic field, but it is not concentrated like in a solenoid.
- A single loop of wire (Option D) creates a magnetic field, but it is weaker and less uniform than that of a solenoid.
Conclusion:
In summary, option C is correct because a solenoid, defined as a coil of many circular turns of insulated wire, is essential for creating a strong and uniform magnetic field, distinguishing it from other configurations.
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