This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A simple electric doorbell probably uses ________ to ring the bell. A) an electromagnet B) ... (Read 31 times)

AEWBW

  • Hero Member
  • *****
  • Posts: 579
on: Jul 28, 2018
A simple electric doorbell probably uses ________ to ring the bell.
 
  A) an electromagnet B) transistor
  C) a DPDT switch D) a permanent magnet

Question 2

A relay is a device that ________.
 
  A) isolates the actuating signal from the control signal
  B) uses an electromagnet to open and close contacts
  C) has a coil to actuate some contacts that control other circuits
  D) all of these


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ergserg

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

D


AEWBW

  • Member
  • Posts: 579
Reply 2 on: Jul 28, 2018
Wow, this really help

robbielu01

  • Member
  • Posts: 336
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Simple food web of an Arctic island. NOTE: The indication of detritivores and pathogens was not part Simple food web of an Arctic island. NOTE: The indication of detritivores and pathogens was not part
tree-ring data tree-ring data
simple squamous simple squamous
An electric sphygmomanometer. An electric sphygmomanometer.
How to calculate simple interest (Part 3) How to calculate simple interest (Part 3)
In a Millikan experiment, a 6.89E-14 kg charged oil droplet is suspended in the electric field ... In a Millikan experiment, a 6.89E-14 kg charged oil droplet is suspended in the electric field ...
Video: Structures that affect circulation - venous return

For a complete list of videos, visit our video library