## Questions and Answers

What is the name of the part marked as 'X' in a DC generator?

What is the name of the rule used to find the direction of induced emf in a DC generator?

Which formula is used to calculate the generated emf 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?

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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 = (Φ
*N*P*B*A*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 = (P
*Φ*N)/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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## Description

Test your knowledge on DC generators with this quiz focused on the 3rd semester of the Electrician trade under NSQF. Challenge yourself with questions on identifying generator parts, finding induced EMF direction, and calculating generated EMF and back EMF.