A conducting ring is placed around the core of an electromagnet as shown in the figure. When key K is pressed , the ring :
Correct answer: C. Jumps out of the core
- A. Remains stationary
- B. Is attracted towards the electromagnet
- C. Jumps out of the core
- D. None of these
Explanation
According to lenz's law the ring will jump out of the core . As when key is pressed current starts to flow in an electromagnet, so ring will oppose the current and jump out of the core according to Lenz's law.
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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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