« previous next »

Author Question: What is the cause of a magnetic field about a permanent magnet and about a current-carrying wire? ... (Read 23 times)

Kthamas

  • Hero Member
  • *****
  • Posts: 546
on: Jul 29, 2018
What is the cause of a magnetic field about a permanent magnet and about a current-carrying wire?
 
  What will be an ideal response?

Question 2

What correction do you suggest to a friend who states that a step-up transformer boosts energy, while a step-down transformer reduces energy in a circuit?
 
  What will be an ideal response?


meganmoser117

  • Sr. Member
  • ****
  • Posts: 303
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: All magnetic fields have their origin in the motion of electric charges. About a permanent magnet the moving charges are electron motions, including possibly spin motions, in the atoms that compose the magnetmost commonly iron atoms. About a current-carrying wire, the drifting electrons produce the magnetic field.

Answer to Question 2

Answer: Mainly, remind your friend of the conservation of energy. Although a transformer can step up or step down voltages and currents, in no way can it do the same with energy. Energy can neither be created nor destroyed.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Magnetic resonance imaging (MRI) image demonstrating a back herniated disk. Magnetic resonance imaging (MRI) image demonstrating a back herniated disk.
ending is impeded by the magnetic attraction between stick and stickase ending is impeded by the magnetic attraction between stick and stickase
Current FDA Pregnancy Category Ratings with Examples Current FDA Pregnancy Category Ratings with Examples
Connecting a handheld digital storage oscilloscope to an oxygen sensor signal wire. The use of the ... Connecting a handheld digital storage oscilloscope to an oxygen sensor signal wire. The use of the ...
To reverse the direction of operation, the polarity of the current through the motor is reversed. To reverse the direction of operation, the polarity of the current through the motor is reversed.
What is the current in Figure 16-1(b) if the diode is made of silicon and the polarity of the ... What is the current in Figure 16-1(b) if the diode is made of silicon and the polarity of the ...
Video: Aneurysm

For a complete list of videos, visit our video library