Magnetic Field Lines Form Closed Loop

Q.

Explain with the help of a labeled diagram the distribution of magnetic field due to a current through a circular loop. Why is it that if a current-carrying coil has n turns the field produced at any point is n times as large as that produced by a single turn?

Q.

Describe uniform and non uniform magnetic fields.

Q.

What is the shape of the magnetic field lines at the centre of a current carrying circular ring?

1. Circular
2. Straight line
3. Ellipse
4. Magnetic field is zero at the centre

Q. Question 19
Meena draws magnetic field lines of field close to the axis of a current carrying circular loop. As she moves away from the centre of the circular loop she observes that the lines keep on diverging. How will you explain her observation?

Q. Magnetic field on the axis of a circular current loop

Q.

Inside the magnet the field lines run :

1. None of these

2. From south to north

3. Away from north pole

4. From north to south

Q.

Draw lines of forces due to two bar magnets, the north pole of one facing the north pole of the other.

Q. 45.Use Biot-Savarts law to derieve the expression for magnetic field due to circular coil(loop) of radius r having n turns at a point on the axis at a distance x from its centre.

Q. How magnetic field on the axis of a loop is zero

Q.

The magnetic lines of force give the direction of the magnetic field. Give a reason for the statement.

Q.

Draw the magnetic field lines representing the uniform magnetic field.

Q.

Is Earth a permanent magnet?

Q.

Question 2
List the properties of magnetic lines of force.

Q. If you carry out an experiment to find the pattern of magnetic field lines due to a bar
magnet using iron filings, you’ll find that the filings arrange themselves in nearly concentric circles
with spaces between them. What is the reason for this spacing between them? Doesn’t magnetic field
exist in the region between them?

Q. what is current loop?

Q. The magnetic field lines inside a current carrying loop are placed _____________.

1. along one direction
2. randomly in all direction
3. along two perpendicular directions
4. along three perpendicular directions

Q. Which of the following figures correctly represents magnetic field lines due to a bar magnet?

Q.

What is a magnetic field flip?

Q. Which of the following figures correctly represents the magnetic field lines due to a bar magnet?

1. 
2. 
3. 
4. 

Q.

The SI unit of magnetic field intensity is______.

1. tesla

2. farad

3. watt

4. ohm

Q. When we pass an electric current In a straight wire, it behaves like a magnet. Where are the south and the north poles located?

Q. Justify the following statements.
a) Two magnetic field lines never intersect each other.
b) Magnetic field lines are closed curves.

Q. Write two properties of magnetic field lines.

Q. State whether true or false :

Q. Where is Earth's magnetic field the strongest?

1. Poles
2. Equator
3. Mountain top
4. Ocean bed

Q.

The SI unit of magnetic field intensity is______.

1. tesla

2. farad

3. watt

4. ohm

Q. L is a circular ring made of a uniform wire. Current enters and leaves the ring through straight conductors which, if produced, would have passed through the centre C of the ring. What is the magnetic field at C?

1. Due to the straight conductors is zero
2. Due to the loop is zero
3. Due to the loop is proportional to $\theta$
4. Due to the loop is proportional to $(\pi -\theta )$

Q. Magnetic lines form continuous closed loops. Why?

Q. Which of the following statements is incorrect regarding magnetic field lines?

(a) The direction of magnetic field at a point is taken to be the direction in which the north pole a magnetic compass needle points.
(b) Magnetic field lines are closed curves.
(c) If magnetic field lines are parallel and equidistant, they represent zero field strength.
(d) Relative strength of magnetic field is shown by the degree of closeness of the field lines.

Q. Are the magnetic field lines closed? Explain.