Some examples from this set of practice questions
1.
What is the relationship between magnetic field strength (H) and magnetic flux density (B)?
Answer: B = μ0 * μr * H
2.
True or False: The magnetic force between currents of the same polarity is attractive.
Answer: True or False: The magnetic force between currents of the same polarity is attractive.
3.
According to Ampere\'s Law, what is the relationship between the integral of the magnetic field (H) around a closed path and the current enclosed?
Answer: ∮H⋅dl = Ienc
4.
What is the formula for calculating the magnetic field strength (H) in terms of current (I)?
Answer: H = I / 2πr (A/m)
5.
What is the formula for finding the magnetic flux (Φ) out of a surface?
Answer: Φ = B * A * cos(θ) (Wb)
6.
Which quadrant of the PH curve do magnets with a large B-H loop operate in?
Answer: Which quadrant of the PH curve do magnets with a large B-H loop operate in?
7.
In magnetic materials, what does the hysteresis loss depend on?
Answer: Rate of Cycling
8.
In a magnetic circuit, what is the equation for MMF (Magnetomotive Force)?
Answer: F = NI
9.
True or False: Hysteresis loss in magnetic materials is proportional to the area enclosed by the B-H curve multiplied by the rate of cycling.
Answer: True
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