CBSE 2025 · Region 6 · Set 1 · Q36 · 5 marks
What are magnetic field lines ? How is the direction of magnetic field at a point determined ? Draw the pattern of magnetic field lines of the magnetic field produced by a current carrying circular loop. Mark on it the direction of (i) current and (ii) magnetic field lines. Name the two factors on which the magnitude of the magnetic field due to a current carrying coil depends.Why can't two magnetic field lines cross each other ? Draw magnetic field lines showing the direction of the magnetic field due to a current carrying long straight solenoid. State the conclusion which can be drawn from the pattern of magnetic field lines inside the solenoid. Name any two factors on which the magnitude of the magnetic field due to this solenoid depends.
What are magnetic field lines ? How is the direction of magnetic field at a point determined ? Draw the pattern of magnetic field lines of the magnetic field produced by a current carrying circular loop. Mark on it the direction of (i) current and (ii) magnetic field lines. Name the two factors on which the magnitude of the magnetic field due to a current carrying coil depends.
Why can't two magnetic field lines cross each other ? Draw magnetic field lines showing the direction of the magnetic field due to a current carrying long straight solenoid. State the conclusion which can be drawn from the pattern of magnetic field lines inside the solenoid. Name any two factors on which the magnitude of the magnetic field due to this solenoid depends.
Marking-scheme solution
(a) Magnetic field lines are the imaginary lines around the magnet
-Magnetic field line directions at a point are determined by placing a small compass needle.
-Figure of magnetic field produced by a current carrying circular coil -
()
()Amount of the electric current flowing through it.
The number of turns in the circular coil
The radius of circular coil
● There will be two directions of the field at the same point i.e. the point where the two field lines intersect which is not possible. / At the point of intersection, the compass needle would point towards two directions, which is not possible.
-Magnetic field lines are equidistant and parallel i.e. the magnetic field is the same at all points inside the solenoid.
Number of turns
Amount of current in solenoid,
Core material inside the solenoid
Magnetic Effects of Electric CurrentMagnetic Field and Field LinesUnderstandlong_answermedium
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CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.