1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dedylja [7]
3 years ago
7

Tech A says that a relay is a one-way electrical check valve used in alternators to change AC into DC. Tech B says that a relay

uses electromagnetism to open or close a switch. Who is correct?
Physics
1 answer:
Setler [38]3 years ago
7 0

Answer:

The correct answer is from Tech B.

Explanation:

The relay is an electromagnetic device, which is stimulated by a very weak electrical current to open or close a circuit.  It functions as a switch controlled by an electrical circuit in which, by means of a coil and an electromagnet, a sequence of one or several contactors is activated that allow to open or close other electrical circuits independent of the one that controls it.

Have a nice day!

You might be interested in
Olivia wants to find out whether a substance will fluoresce. She says she should put it in a microwave oven. Do you agree with h
andreyandreev [35.5K]
Disagree.
Fluoresce objects will only glow when put under actual Ultraviolet light. This is due to the molecules becoming excited by the ultraviolet radiation.


Microwaves give micro-waves that are present in another spectrum of wave length and will not be able to fluoresce the molecules. If it’s not “ultra violet “.... it’s not going to glow.
4 0
3 years ago
Read 2 more answers
It is necessary to determine the specific heat of an unknown object. The mass of the object is 201.0 g. It is determined experim
navik [9.2K]
Mass = 0.201kg
Energy = 15J
temperature change = 10C

Energy(E) = mass(m) × specific heat capacity(c) × temperature change(θ)

we can rearrange this to make specific heat capacity the subject

c =\frac{E}{m\theta}

c =\frac{15}{2.01}
c =7.46268657

6 0
3 years ago
Read 2 more answers
Sphere is fired downwards into a medium with an initial speed of 27 m/s. If it experiences a
anygoal [31]

Answer:

33 m/s

first i do 27+6=33 +s2=

8 0
3 years ago
Which is an important step in how an electric motor uses magnetic force to produce motion?
Fiesta28 [93]

Answer:B.As the north pole of the electromagnet nears the south pole of the permanent magnet, the current reverses and the poles of the magnets then repel.

Explanation:

3 0
3 years ago
Read 2 more answers
What is the velocity of the 100 kg cart at point b?
Gre4nikov [31]
I believe the answer is c
8 0
3 years ago
Other questions:
  • Can you help me??????????????????????????)?
    7·1 answer
  • If a molecule has four hybrid sp3 orbitals, it can be concluded that the molecule has a
    9·2 answers
  • Two red and two overlapping balls in the center are surrounded by a green, fuzzy, circular cloud with a white line running throu
    8·2 answers
  • During a storm, a tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between
    7·2 answers
  • The roller coaster from problem #1 then tops a second hill at 15.0 m/s, how high is the second hill?
    10·1 answer
  • What is less dense water or oil steel or water helium or air or oil or water
    12·2 answers
  • What is true about the inertia of two cars , car A of mass 1,500 kilograms and car B of mass 2,000 kilograms?
    15·1 answer
  • M = 15 kg, a = 2 m/s2, F =
    11·1 answer
  • What is a electric curcit
    5·2 answers
  • A bullet is at rest. It travels a distance of 0.34m in a time of 0.0095 seconds. Calculate its acceleration
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!