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What material is used to make brushes in a DC Machine?
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What type of material is used to make the armature core?

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State at least one function and the material used for the following parts of a DC motor.

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How is the DC machine connected to work as a Generator?

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Which material is used to reduce eddy current loss?

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What is the function of commutator in a DC machine?

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Explain what are inter-poles and why they are required in a dc machine.

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Explain the process of commutation in a dc machine.

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Explain the process of commutation in a dc machine. Explain what are inter-poles and why they are required in a dc machine.

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What is hysteresis loss in a DC machine?
Answer : Hysteresis loss in a DC machine refers to the energy loss that occurs due to the magnetic properties of the core material used in the machine, such as the armature core. In a DC machine, the core ... with eddy current loss) in a DC machine and contributes to the total energy loss in the system....

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What does hysteresis loss in a DC machine least depend on?

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What is the function of field winding in a DC Machine?

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What is the difference between a motor and a generator in DC machine?

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How is the eddy current loss minimized in DC machine?

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Make use of load factor and maximum demand tariff to minimize electrical consumption of electrical installation.

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State any two applications of gaseous insulating material used in switchgears.

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List any four applications of insulating material used in electrical fields.

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Is a transformer AC or DC machine?
Answer : A transformer is an **AC (Alternating Current) machine**. This is because transformers work on the principle of **electromagnetic induction**, which only happens with alternating current. ... coil after the initial moment of current flow. Therefore, transformers only function properly with AC....

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State functions of the following parts of d.c motor: (i) Pole shoe (ii) Commutator (iii) Brushes (iv) Yoke.

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What is the main purpose of the commutator and brushes?

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How to reduce eddy current loss in the core of magnetic material?

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State the material used for making (1) Magnetic Core (2) Fuse element.

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Name the material used and the sensitivity of the following thermocouple type: (i) J (ii) K (iii) R (iv) S.

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Draw the symbol and characteristic of LDR. Give the material used for it.

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State any four properties of conductor material used for overhead conductor.

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