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 36 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
:D TYSM

lcapri7

  • Member
  • Posts: 350
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Wasp ocelli (simple eyes) and dorsal part of the compound eyes; also showing fine, unbranched hairs Wasp ocelli (simple eyes) and dorsal part of the compound eyes; also showing fine, unbranched hairs
Ivanpah Solar Electric Generating System Ivanpah Solar Electric Generating System
Free energy diagrams for the simple reaction A ----> B Free energy diagrams for the simple reaction A ----> B
A simple harmonic oscillator has an amplitude of 3.50 cm and a maximum speed of A simple harmonic oscillator has an amplitude of 3.50 cm and a maximum speed of
Calculating the area of a circular ring Calculating the area of a circular ring
Descartes's model of simple reflexes Descartes's model of simple reflexes
Video: Conjunctivitis

For a complete list of videos, visit our video library