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Questions and Answers
What is the name of the part marked as 'X' in a DC generator?
What is the name of the part marked as 'X' in a DC generator?
- Brush
- Armature core
- Commutator raiser (correct)
- Differential long shunt compound
What is the name of the rule used to find the direction of induced emf in a DC generator?
What is the name of the rule used to find the direction of induced emf in a DC generator?
- Right hand palm rule
- Cork screw rule
- Fleming’s left hand rule
- Fleming’s right hand rule (correct)
Which formula is used to calculate the generated emf in a DC generator?
Which formula is used to calculate the generated emf in a DC generator?
- Generated emf = \phi ZN P x Volt
- Generated emf = \phi ZN x A Volt
- Generated emf = \phiZN P Volt (correct)
- Generated emf = \phi ZN x P Volt
What is the name of the part marked 'X' in a DC generator?
What is the name of the part marked 'X' in a DC generator?
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What is the formula to calculate back emf of a DC motor?
What is the formula to calculate back emf of a DC motor?
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Study Notes
DC Generator Components
- The part marked 'X' in a DC generator is the brush.
DC Generator Rules and Formulas
- The rule used to find the direction of induced emf in a DC generator is Fleming's Right-Hand Rule.
- The formula used to calculate the generated emf in a DC generator is ε = (ΦNPBA*f)/60, where ε is the generated emf, Φ is the flux, N is the speed, P is the number of poles, B is the flux density, A is the area, and f is the frequency.
DC Motor Formula
- The formula to calculate back emf of a DC motor is Eb = (PΦN)/60, where Eb is the back emf, P is the number of poles, Φ is the flux, and N is the speed.
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