Indicate which of the following statements refer to LCD displays and which refer to LED displays: a. Emit light b. Reflect ambient light c. Are best for low-power applications d. Require an AC voltage e. Use a 7-segment arrangement to produce digits f. Require current-limiting resistors

Indicate which of the following statements refer to LCD displays and which refer to LED displays: a. Emit light b. Reflect ambient light c. Are best for low-power applications d. Require an AC voltage e. Use a 7-segment arrangement to produce digits f. Require current-limiting resistors

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter59: Motor Startup And Troubleshooting Basics

Section: Chapter Questions

Problem 12SQ: How is a solid-state diode tested? Explain.

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Concept explainers

Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.

Question

Indicate which of the following statements refer to LCD displays and which refer to LED displays:
   a. Emit light
   b. Reflect ambient light
   c. Are best for low-power applications
   d. Require an AC voltage
   e. Use a 7-segment arrangement to produce digits
   f. Require current-limiting resistors

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