Author Question: What is the cause of a magnetic field about a permanent magnet and about a current-carrying wire? ... (Read 57 times)

Kthamas

  • Hero Member
  • *****
  • Posts: 546
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
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
 

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

For a complete list of videos, visit our video library