How is the magnetomotive force per unit length denoted, and what is its symbol in equation form?  

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SSC JE Electrical 4 Dec 2023 Official Paper II
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  1. Magnetising force (H) 
  2. Magnetic permeability (μ) 
  3. Magnetic flux (Φ) 
  4. Magnetic density (B) 

Answer (Detailed Solution Below)

Option 1 : Magnetising force (H) 
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Magnetizing Force (H): The magnetizing force is the magnetic field intensity within a material. It is related to the magnetic field strength produced by a current flowing in a coil wound around a magnetic core. The SI unit for magnetizing force is amperes per meter (A/m).

In equations, magnetizing force (H) is given by: \(H = \frac{NI}{l}\)

where:
H is the magnetizing force,
N is the number of turns of the coil,
 I is the current flowing through the coil, and
 l is the length of the coil.
So, the correct answer to your question is: Magnetizing force (H)

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