As shown in the diagram an aluminium rod 'AB' is suspended horizontally between the two poles of a strong horse shoe magnet in such a way that the axis of rod is horizontal and the direction of the magnetic field is vertically upward. The rod is connected in series with a battery and a key.
State giving reason:
(a) What is observed when a current is passed through the aluminum rod from end B to end A?
(b) What change is observed in a situation in which the axis of the rod 'AB' is moved and aligned parallel to the magnetic field and current is passed in the rod in the same direction?
OR
"Magnetic field is a physical quantity that has both direction and magnitude." How can this statement be proved with the help of magnetic field lines of a bar magnet?
As shown in the diagram an aluminium rod 'AB' is suspended horizontally between the two poles of a strong horse shoe magnet in such a way that the axis of rod is horizontal and the direction of the magnetic field is vertically upward. The rod is connected in series with a battery and a key.
State giving reason:
(a) What is observed when a current is passed through the aluminum rod from end B to end A?
(b) What change is observed in a situation in which the axis of the rod 'AB' is moved and aligned parallel to the magnetic field and current is passed in the rod in the same direction?
OR
"Magnetic field is a physical quantity that has both direction and magnitude." How can this statement be proved with the help of magnetic field lines of a bar magnet?
The magnetic field lines of a bar magnet emerge from the north pole and enter the south pole. The direction of the magnetic field is from the north pole to the south pole. The magnetic field lines are closed curves, and no two field lines intersect each other. The relative strength of the magnetic field is shown by the degree of closeness of the field lines. The field is stronger where the field lines are crowded.
Marking Scheme
- 1The magnetic field lines of a bar magnet emerge from the north pole and enter the south pole.
- 2The direction of the magnetic field is from the north pole to the south pole.
- 3The magnetic field lines are closed curves, and no two field lines intersect each other.
- 4The relative strength of the magnetic field is shown by the degree of closeness of the field lines.
- 5The field is stronger where the field lines are crowded.
Hint
The magnetic field lines of a bar magnet emerge from the north pole and enter the south pole. The direction of the magnetic field is from the north pole to the south pole. The magnetic field lines are closed curves, and no two field lines intersect each other. The relative strength of the magnetic field is shown by the degree of closeness of the field lines. The field is stronger where the field lines are crowded.
Quick Oral Answer
The magnetic field lines of a bar magnet emerge from the north pole and enter the south pole. The direction of the magnetic field is from the north pole to the south pole. The magnetic field lines are closed curves, and no two field lines intersect each other. The relative strength of the magnetic field is shown by the degree of closeness of the field lines. The field is stronger where the field lines are crowded.
Analysis & Explanation
The magnetic field lines of a bar magnet emerge from the north pole and enter the south pole. The direction of the magnetic field is from the north pole to the south pole. The magnetic field lines are closed curves, and no two field lines intersect each other. The relative strength of the magnetic field is shown by the degree of closeness of the field lines. The field is stronger where the field lines are crowded.
Common Mistakes
- 1The magnetic field lines of a bar magnet do not emerge from the north pole and enter the south pole.
- 2The direction of the magnetic field is not from the north pole to the south pole.
- 3The magnetic field lines are not closed curves, and two field lines can intersect each other.
- 4The relative strength of the magnetic field is not shown by the degree of closeness of the field lines.
- 5The field is not stronger where the field lines are crowded.
Interesting Facts
The magnetic field lines of a bar magnet are similar to the electric field lines of a point charge.
The magnetic field lines of a bar magnet can be used to determine the direction of the magnetic field.
The magnetic field lines of a bar magnet can be used to determine the strength of the magnetic field.
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2022?
This question carries 2 marks in the CBSE Class 10 Science 2022 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Magnetic Effects of Electric Current" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Magnetic Field" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2022 paper?
This is a Short Answer question from Section A in the CBSE Class 10 Science 2022 paper.