Which of the following statement /statements are correct?
1. Parallel & equidistant magnetic field lines are represent zero field strength.
2. Near the poles of a magnet, magnetic field lines come closer and represent strong field
magnetism.
3. Magnetic field strength inside a solenoid is uniform.
4. Using steel as core of an electromagnet becomes permanent magnet.
a) 2, 3 are correct b) 1,3,4 are correct
c) Only 4 is correct d) 2,4 are correct
Answers
Answer:
The close continuous curves in a magnetic field are called magnetic lines of force. Curved lines are used to represent a magnetic field, drawn such that the number of lines relates to the magnetic field's strength at a given point and the tangent of any curve at a particular point is along the direction of magnetic force at that point.
The magnetic lines of force are uniform and strong at the center or middle and they diverge as they move towards the ends and the distance between the lines increases. Eventually, the strength of the magnetic field is strong where the lines are closer and they weaken as they closeness decreases. Hence, if the field lines in a magnetic field are parallel and equidistant, the magnetic field is uniform.
Answer:
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