A student was asked to perform an experiment to study the force on a current carrying conductor in a magnetic field. He took a small aluminum rod AB, a strong horse shoe magnet, some connecting wires, a battery and a switch and connected them as shown. He observed that on passing current, the rod gets displaced. On reversing the direction of current, the direction of displacement also gets reversed. On the basis of your understanding of this phenomenon, answer the following questions:
(a) Why does the rod get displaced on passing current through it?
(b) State the rule that determines the direction of the force on the conductor AB.
(c) (i) If the U shaped magnet is held vertically and the aluminum rod is suspended horizontally with its end B towards due north, then on passing current through the rod from B to A as shown, in which direction will the rod be displaced?
(ii) Name any two devices that use current carrying conductors and magnetic field.
A student was asked to perform an experiment to study the force on a current carrying conductor in a magnetic field. He took a small aluminum rod AB, a strong horse shoe magnet, some connecting wires, a battery and a switch and connected them as shown. He observed that on passing current, the rod gets displaced. On reversing the direction of current, the direction of displacement also gets reversed. On the basis of your understanding of this phenomenon, answer the following questions:
(a) Why does the rod get displaced on passing current through it?
(b) State the rule that determines the direction of the force on the conductor AB.
(c) (i) If the U shaped magnet is held vertically and the aluminum rod is suspended horizontally with its end B towards due north, then on passing current through the rod from B to A as shown, in which direction will the rod be displaced?
(ii) Name any two devices that use current carrying conductors and magnetic field.
Official answer
The pattern of magnetic field lines produced around a current-carrying straight conductor held vertically on a horizontal cardboard is shown in the figure below. The direction of the field lines is indicated by arrows, and the direction of current flowing through the conductor is shown by the arrowhead on the conductor.
Marking scheme
- 1.Draw the pattern of magnetic field lines produced around a current-carrying straight conductor held vertically on a horizontal cardboard.
- 2.Indicate the direction of the field lines as well as the direction of current flowing through the conductor.
Hint
Use the right-hand thumb rule to determine the direction of the magnetic field lines around the conductor.
Quick oral answer
The pattern of magnetic field lines produced around a current-carrying straight conductor held vertically on a horizontal cardboard is a series of concentric circles. The direction of the field lines is indicated by arrows, and the direction of current flowing through the conductor is shown by the arrowhead on the conductor. This pattern is consistent with the right-hand thumb rule, which states that if you point your thumb in the direction of the current, your fingers will curl in the direction of the magnetic field lines.
Common mistakes
- 1.Drawing the magnetic field lines incorrectly.
- 2.Not indicating the direction of the field lines or the direction of current flowing through the conductor.
Analysis and explanation
The pattern of magnetic field lines produced around a current-carrying straight conductor held vertically on a horizontal cardboard is a series of concentric circles. The direction of the field lines is indicated by arrows, and the direction of current flowing through the conductor is shown by the arrowhead on the conductor. This pattern is consistent with the right-hand thumb rule, which states that if you point your thumb in the direction of the current, your fingers will curl in the direction of the magnetic field lines.
Interesting facts
The pattern of magnetic field lines produced around a current-carrying straight conductor held vertically on a horizontal cardboard is a series of concentric circles.
The direction of the field lines is indicated by arrows, and the direction of current flowing through the conductor is shown by the arrowhead on the conductor.
Question details
Q15 of 22 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2022
- Section
- Section Section C
- Marks
- 4
- Chapter
- Magnetic Effects of Electric Current
- Topic
- Magnetic Field Lines
- Bloom's level
- Understanding
- Syllabus topic
- Magnetic Field Lines
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2022?
This question carries 4 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 Lines" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2022 paper?
This question appears in Section Section C in the CBSE Class 10 Science 2022 paper.