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The strength of the magnetic field between the poles of an electromagnet would be unchanged if:
In the straight wire A, current is flowing in the vertically downwards direction whereas in wire B the current is flowing in the vertically upward direction. What is the direction of magnetic field:
(a) in wire A?
(b) in wire B?
Name the rule which you have used to get the answer.
Explain what you understand by magnetic induction. What role does it play in attraction of a piece of iron by a magnet?
Can two magnetic field lines intersect each other? Give reason to your answer.
Draw the pattern of magnetic field lines near a bar magnet placed with its North Pole pointing towards the geographic North. Indicate the position of neutral points by marking X.
Complete the following sentence :
If the field lines in a magnetic field are parallel and equidistant, the magnetic field is __________ .
Select the correct option:
The magnetic strength of a bar magnet is:
Describe two methods of determining the arrangement of the lines of force in the field close to a bar magnet. Give a brief explanation of each method.
The relative strength of the magnetic field at a point in the space surrounding the magnet is shown by the ____________.
Magnetic field lines determine ______.
