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Get CBSE Notes for Class 10 Science Chapter 13. Magnetic Effects of Electric Current: Introduction prepared by experts as per the latest NCERT syllabus and CBSE exam pattern. These concise and easy-to-understand notes cover important definitions, formulas, diagrams, and key concepts from the chapter to help students in quick revision and effective exam preparation. Whether you are studying for school tests, board exams, or competitive exams, these notes provide a reliable study resource. Designed in simple language with point-wise explanations, they save time and enhance learning efficiency. Download free PDF notes, explore solved examples, and strengthen your understanding of [Topic Name] for scoring high marks. Perfect for Class 10 students who want clear, structured, and exam-oriented notes for CBSE Science.
Chapter 13. Magnetic Effects of Electric Current
Magnetic field: The region surrounding a magnet, in which the force of the magnet can be detected, is called a magnetic field.
Magnetic field lines: There are many lines forms around a magnet, which are originated from north pole and it seems to end with south pole of magent such line are known as magnetic field lines.
Properties of magnetic field lines:
(i) The magentic field lines emerge from north pole and merge at the south pole.
(ii) Inside the magnet, the direction of field lines is from its south pole to its north pole.
(iii) The magnetic field lines are closed curves.
(iv) The magnetic field is stronger, where the field lines are crowded.
(v) Two field lines do not intersect/cross each other.
Magnetic field lines do not intersect each other:
This is so, magnetic field lines do not intersect each other. If they did, it would
mean that at the point of intersection, the compass needle would point
towards two directions, which is not possible.
Magnetic field around a current-carrying conductor:
Right-Hand Thumb Rule:
Imagine that you are holding a current-carrying straight conductor in your right hand such that the thumb points towards the direction of current. Then your fingers will wrap around the conductor in the direction of the field lines of the magnetic field. This is known as the right-hand thumb rule. This rule is also known as Maxwell’s corkscrew rule.
Magnetic Field due to a Current through a Circular Loop:
The magnetic field produced by a current-carrying straight wire depends inversely on the distance from it. Similarly at every point of a current-carrying circular loop, the concentric circles representing the magnetic field around it would become larger and larger as we move away from the wire.
Properties of magnetic field line of a current through a circular loop:
(i) At the center of this loop the magnetic field lines are a straight line.
(ii) Every point on the wire carrying current would give rise to the magnetic field appearing as straight lines at the center of the loop.
(iii) Section of the wire contributes to the magnetic field lines in the same direction within the loop.
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