Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 39, Problem 15SQ
A synchronous motor can be used to increase the power factor of an electrical system by
- a. reducing the speed.
- b. overexciting the stator field.
- c. operating at unity power factor.
- d. applying DC to the stator field.
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Q3: Why is the DRAM cell design simpler but slower than SRAM?
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1. What does SRAM use to store data?
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。 c) Flip-flops
od) Transistors
2. Which RAM type requires refreshing?
o a) SRAM
ob) DRAM
。 c) ROM
od) Flash
3. What type of memory retains data only while power is on?
a) ROM
。 b) EEPROM
o c) DRAM
od) Flash
4. How many addresses can a 15-bit address bus handle?
o a) 32k
•
b) 64k
o c) 16k
od) lk
5. What operation occurs when data is copied out of memory without erasing?
oa) Write
ob) Read
o c) Refresh
o d) Load
6. DRAM cells store bits using:
a) Flip-flops
。 b) Capacitors
c) Diodes
od) Resistors
7. The cache located inside the CPU is:
。 a) L2 cache
o b) LI cache
°c) ROM
od) HDD
8. SDRAM is synchronized with:
o a) Cache
ob) Data Bus
c) System Clock
od) Hard Disk
9. The bus that carries commands is called:
o a) Data Bus
b) Control Bus
o
c) Address Bus
o d) Logic Bus
10. What is the main use of SRAM?
o Disk storage
o Cache
o Main memory
o Registers
11. The smallest addressable unit in…
Chapter 39 Solutions
Electric Motor Control
Ch. 39 - Prob. 1SQCh. 39 - What is the effect of the starting winding of the...Ch. 39 - What are typical applications of synchronous...Ch. 39 - Prob. 4SQCh. 39 - A loaded synchronous motor cannot operate...Ch. 39 - Why must a discharge resistor be connected in the...Ch. 39 - Depending on their power factor ratings, what is...Ch. 39 - At what power factor do incandescent lights...Ch. 39 - Prob. 9SQCh. 39 - The speed of a synchronous motor is fixed by the...
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Working of Synchronous Motor; Author: Lesics;https://www.youtube.com/watch?v=Vk2jDXxZIhs;License: Standard Youtube License