Podcast
Questions and Answers
What is the term for the difference between the magnetic poles of the earth and the true north and south?
What is the term for the difference between the magnetic poles of the earth and the true north and south?
- Magnetic variation
- Angle of declination (correct)
- Magnetic deviation
- Polar displacement
What is the characteristic of ferromagnetic materials?
What is the characteristic of ferromagnetic materials?
- They are only magnetized when an electric current is applied
- They are easily magnetized (correct)
- They can be magnetized but only temporarily
- They cannot be magnetized at all
What is the symbol used to represent magnetic lines of force?
What is the symbol used to represent magnetic lines of force?
- ψ (psi)
- Î’ (beta)
- Φ (phi) (correct)
- λ (lambda)
What is the behavior of like poles when they interact with each other?
What is the behavior of like poles when they interact with each other?
What type of material is copper classified as?
What type of material is copper classified as?
What is the primary function of the commutator in a DC motor?
What is the primary function of the commutator in a DC motor?
What is the effect of Counter EMF on a DC motor?
What is the effect of Counter EMF on a DC motor?
What determines the amount of torque produced by a DC motor?
What determines the amount of torque produced by a DC motor?
What is the purpose of interpoles in a DC motor?
What is the purpose of interpoles in a DC motor?
What is the characteristic of a Series Motor?
What is the characteristic of a Series Motor?
What is the primary mechanism by which a DC motor produces torque?
What is the primary mechanism by which a DC motor produces torque?
What is the primary factor in determining the strength of an electromagnetic field?
What is the primary factor in determining the strength of an electromagnetic field?
What is the term for the ability of a core material to become magnetized?
What is the term for the ability of a core material to become magnetized?
When current stops flowing, what happens to the core material?
When current stops flowing, what happens to the core material?
What is the purpose of the left-hand rule in electromagnetism?
What is the purpose of the left-hand rule in electromagnetism?
What are the three systems for measuring magnetism?
What are the three systems for measuring magnetism?
What is the purpose of the Commutator in a DC generator?
What is the purpose of the Commutator in a DC generator?
What type of armature winding is used for higher voltage lower current operations?
What type of armature winding is used for higher voltage lower current operations?
What is the term for the point at which there is 0 volts present in the commutator?
What is the term for the point at which there is 0 volts present in the commutator?
What are the three main types of field windings in a DC generator?
What are the three main types of field windings in a DC generator?
What is the main principle behind the operation of a DC generator?
What is the main principle behind the operation of a DC generator?
What is the function of the Brushes in a DC generator?
What is the function of the Brushes in a DC generator?
What is the function of the shunt field relay in a DC motor?
What is the function of the shunt field relay in a DC motor?
What is the unit of power equivalent to 1 Horsepower?
What is the unit of power equivalent to 1 Horsepower?
What is the purpose of a hall effect sensor in a brushless DC motor?
What is the purpose of a hall effect sensor in a brushless DC motor?
What is the correct way to reverse the direction of rotation of a DC motor?
What is the correct way to reverse the direction of rotation of a DC motor?
What is the characteristic of a short shunt compound motor?
What is the characteristic of a short shunt compound motor?
What is the purpose of the right-hand rule in motors?
What is the purpose of the right-hand rule in motors?
