A long tightly wound cylindrical coil of wire is called:
Correct answer: D. Solenoid
- A. Capacitor
- B. Resistance
- C. Inductor
- D. Solenoid
Explanation
A solenoid is a long, tightly wound cylindrical coil of wire, often with a ferromagnetic core inside. When an electric current passes through the coil, it generates a magnetic field around it. Solenoids are used in a variety of applications, including electromechanical actuators (such as in valves and relays), electromagnetic locks, and magnetic field generation in scientific experiments. They can produce linear motion or create a magnetic field for other components to interact with.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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The induced current can be increased by:
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In the region surrounding a current carrying wire:
The magnetic field at the middle of the solenoid is:
The magnetic field out of the solenoid is:
Which one is suitable for circular trajectory of a charged particle: