If current passing through a solenoid is increased, which of the following must increase
Correct answer: C. Magnetic field
- A. Length of solenoid
- B. Number of turns
- C. Magnetic field
- D. All of these
Explanation
The magnetic field inside a solenoid is directly proportional to the current flowing through it. This is because the magnetic field is created by the current flowing in the loops of wire that make up the solenoid. The formula for the magnetic field inside a solenoid is:B = μ₀nIWhere:B is the magnetic field strengthμ₀ is the permeability of free spacen is the number of turns per unit lengthI is the current flowing through the solenoidTherefore, if the current passing through a solenoid is increased, the magnetic field strength will also increase.
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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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