Worksheetsplacement online test 4
Total questions: 5
Worksheet time: 3mins
1. What is the effect of increasing the cross-sectional area of a magnetic core, assuming other parameters are constant?
A) Increases reluctance
B) Decreases reluctance
C) Increases magnetic flux leakage
D) Has no effect
2. The magnetic field intensity (H) is defined as:
A) Magneto-motive force per unit length
B) Magnetic flux per unit area
C) Permeability times flux density
D) Magnetic flux times reluctance
3. Which of the following is NOT a unit of magnetic field strength (H)?
A) A/m
B) Ampere per meter
C) N/Wb
D) Tesla
4. What is the purpose of using laminated cores in electrical machines?
A) To reduce magnetic flux
B) To increase reluctance
C) To reduce eddy current losses
D) To increase inductance
5. In which material is magnetic hysteresis loss lowest?
A) Hard steel
B) Cast iron
C) Soft iron
D) Copper
