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
Bond [772]
3 years ago
15

An electromagnet is a device in which moving electric charges (current) in a coil of wire create a magnet. What’s one advantage

of using electromagnets in devices?
A. Electromagnets have a strong, constant magnetic field.
B.Electromagnets are more powerful than permanent magnets.
C.Electromagnets don’t need a source of electricity to work.
D.Electromagnets can easily be turned on and off.
Biology
2 answers:
denis23 [38]3 years ago
7 0
D they are easily contained charges so on and off is no problemo
Ivenika [448]3 years ago
4 0

Answer:

D.Electromagnets can easily be turned on and off.

Explanation:

An electromagnet is a device which moving electric charges(current) in a coil of wire create a magnet. Electromagnets can easily be turned off and on because it is a electromagnet. When current flows through a wire, a magnetic field is produced around a wire and create an electromagnet. The coils are always made of copper wire because copper is a good conductor of electricity.

Advantage of using electromagnetic devices:

Electromagnet over a permanent magnet: It is the magnetic field can be sudden changed by the controlling the amount of electric current in winding. It needs no power, an electromagnet needs continuous supply of current to maintain the magnetic field.

You might be interested in
Boilogy ;factors that affect enzymetic activites​
Yuri [45]
Several factors affect the rate at which enzymatic concentration, substrate concentration, and the presence of any inhibitors or activators
3 0
3 years ago
Describe how each of these 4 processes can affect salinity. Are they increasing or decreasing the salinity?
Charra [1.4K]

Iceberg: The formation of icebergs increases salinity because it is taking liquid water out of the ocean without taking the salt.

Sea Ice: Same as icebergs, this increases salinity because it removes liquid water.

Runoff: This decreases salinity because it is introducing fresh water into the ocean, reducing the salt to water ratio.

Evaporation: This would increase salinity because it is removing liquid water from the ocean, increasing the salt to water ratio.

Hope this helps!

4 0
3 years ago
When a volcano erupts, particles of rock and ash are released into the atmosphere. After this, water droplets form around the ro
Viktor [21]

Answer:

When a volcano erupts particles of rock and ash are released into the atmosphere after this water droplets form around?

When a volcano erupts, particles of rock and ash are released into the atmosphere. After this, water droplets form around the rock and ash particles and fall to Earth as rain. The rainwater helps plants grow. Which scenario describes an interaction between two of Earth's spheres?

Explanation:

6 0
3 years ago
What is better for a beginners pet leopard gecko or crested gecko
Sedbober [7]

Answer:

leopard gecko

Explanation:

7 0
3 years ago
Read 2 more answers
Read the following statement: "It is thought that the dinosaurs were killed
Rom4ik [11]

Answer:

A

Explanation:

8 0
2 years ago
Read 2 more answers
Other questions:
  • After the first day or so of fasting, most of the body's stores of __________ are depleted.
    9·2 answers
  • What can people do to lessen the effect of energy production on the pH of freshwater sources? Check all that apply.
    8·2 answers
  • Why is it important to classify the millions of species on earth?
    15·1 answer
  • How can DNA be used in forensics to solve crimes?
    8·2 answers
  • A cell biologist measures the volume of a bacteria cell. the volume is . what is the volume in picoliters?
    7·1 answer
  • AWNSER ASAP PLEASE!!!
    12·1 answer
  • How are the virus and bacterium similar
    11·1 answer
  • Which viral reproduction is active and takes over the process of protein synthesis to produce new viruses?
    6·1 answer
  • If the first trophic level in an energy pyramid receives 1,000 units of energy from the Sun, how much energy is available for th
    8·1 answer
  • 2. What has happened to the level of carbon dioxide in the atmosphere in the past several
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!