Log in
Physics
1
answer
0
watching
98
views

Which of the following best describes magnetic field lines?

A. They always begin at the north pole and terminate at the south pole.

B. They can only cross when multiple magnets are present.

C. They show the direction in which a positive charge will experience a force.

D. More than one of the other options are correct.

E. They show the relative strength and direction of the magnetic field. 

Watch
1
answer
0
watching
98
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Coleen Amado
Coleen AmadoLv10
19 Sep 2020

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share

Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

a) Which of the following statements about magnetic fields is true?

 
Magnetic field lines point in towards the north pole of a magnet.
 
None of these.
 
Magnetic field lines point outward from the north pole of a magnet.
 
Magnetic field lines point outward from the south pole of a magnet.
 
There are no magnetic field lines outside the magnet.
 
There are no magnetic field lines unless iron filings are present.
 
 
b) What is an acceptable ending to the following sentence: “Magnetic field lines…”
 
Are not present without iron filings.
 
Form closed loops.
 
Can cross each other.
 
None of these.
 
Originate from monopoles.
 
All of the above.
 
 
c) Which of the following arrangements produces an attractive force?
 
South Pole to South Pole
 
Magnets never attract each other, only iron filings.
 
South Pole to North Pole
 
North Pole to North Pole
 
All of these.
 
None of these.
 

Please answer the following questions about magnetic fields.

a) Which of the following statements about magnetic fields are true? sig.gif?tid=8C84-AA-63-48-8A6B-12417

1. Magnetic field lines point in towards the north pole of a magnet.

2. None of these.

3. Magnetic field lines point outward from the north pole of a magnet.

4. Magnetic field lines point outward from the south pole of a magnet.

5. There are no magnetic field lines outside the magnet.

6. There are no magnetic field lines unless iron filings are present.

b) What is an acceptable ending to the following sentence: “Magnetic field lines…” sig.gif?tid=8C84-AA-63-48-8A6B-12417

1. Are not present without iron filings.

2. Form closed loops.

3. Can cross each other.

4. None of these.

5. Originate from monopoles.

6. All of the above.

c) Which of the following arrangements produces an attractive force? sig.gif?tid=8C84-AA-63-48-8A6B-12417

1. South Pole to South Pole.

2. Magnets never attract each other, only iron filings.

3. South Pole to North Pole.

4. North Pole to North Pole.

5. All of these.

6. None of these.

 

 

 

 

 

 

 

 

 

 

 

Faraday's law describes how electric fields and electromotive forces are generated from changing magnetic fields. This problem is a prototypical example in which an increasing magnetic flux generates a finite line integral of the electric field around a closed loop that surrounds the changing magnetic flux through a surface bounded by that loop. A cylindrical iron rod with cross-sectional area is oriented with its symmetry axis coincident with the z axis of a cylindrical coordinate system as shown. It has a uniform magnetic field inside that varies according to  .

uploaded image

1. Find  , the electromotive force (EMF) around a loop that is at distance R from the z axis, where R is restricted to the region outside the iron rod as shown. Take the direction shown in the figure as positive

2. Due to the cylindrical symmetry of this problem, the induced electric field   can depend only on the distance R from the z axis, where R is restricted to the region outside the iron rod. Find this field

Weekly leaderboard

Home
Homework Help 3,900,000
Physics 110,000
Start filling in the gaps now
Log in