Advertisements
Advertisements
Question
Figure. shows a bar magnet placed on the table top with its north pole pointing towards south. The arrow shows the north-south direction. There are no other magnets or magnetic materials nearby.
What is the magnitude of the magnetic field at each neutral point? Give a reason for your answer.
Advertisements
Solution
Magnitude of magnetic field at neutral points is zero. It is so because at these points, the magnetic field of the magnet is equal in magnitude to the earth's horizontal magnetic field, but it is in opposite direction. Hence, they cancel each other.
APPEARS IN
RELATED QUESTIONS
Explain why, two magnetic field lines of not intersect each other.
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.
A magnetic field exerts no force on:
an electrical charge moving perpendicular to its direction
an unmagnetised iron bar
a stationary electric charge
a magnet
A portable radio has a built-in transformer so that it can work from the mains instead of batteries. Is this a set-up or step down transformer?
What is a natural magnet? State two limitations of a natural magnet.
In following figure, draw at least two magnetic field lines between the two magnets.
(a) 
The intensity of a magnetic field is indicated by the lines of ______.
Draw diagram showing the arrangement of the lines of force for a single magnet.
Draw diagram showing the arrangement of the lines of force for two magnets in line, with unlike poles facing one another.
State the inference drawn about the direction of the magnetic field lines on the basis of the following diagrams.
 |
 |
| Figure 'a' | Figure 'b' |
