Which one of the following devices can be used to accurately and conveniently measure the speed of a motor with a small slip? A. Tachometer B. Revolution counter and stop watch C. Incandescent lamp and colored disk D. Stroboscope

Which one of the following devices can be used to accurately and conveniently measure the speed of a motor with a small slip? A. Tachometer B. Revolution counter and stop watch C. Incandescent lamp and colored disk D. Stroboscope

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter12: Batteries And Other Sources Of Electricity

Section: Chapter Questions

Problem 12RQ: 12. How is the A-hr capacity of a lead-acid battery determined?

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Concept explainers

Gear Motor

A gear motor is a combination of a gearbox and an electric motor. This combination of two systems is used for efficient usage of the motor. It makes a cost-effective solution for high torque, low-speed applications. These motors are used in our household as, garage door openers, alarm clocks. In commercial areas, hospital beds, cranes.

Question

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Which one of the following devices can be used to accurately and conveniently measure the speed of a
motor with a small slip?
A. Tachometer
B. Revolution counter and stop watch
C. Incandescent lamp and colored disk
D. Stroboscope

Note: I have doubts if it is the letter A or the letter D, can you help me in this question, thanks.

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