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Science · 2026 · 5 marks
CBSE 2026 · Region 5 · Set 1 · Q39
(i)Draw a diagram showing the magnetic field lines around a bar magnet. Write any two characteristics of magnetic field lines.(ii)Write the statement of Right hand thumb rule.(iii)The concentric circles representing the magnetic field around a current carrying straight wire become larger and larger as we move away from the wire. How does magnetic field change on these concentric circles ?(i)Draw a diagram, showing the magnetic field lines in and around the current carrying solenoid. Write any two salient features of these lines.(ii)What is an electromagnet and how is it made ? { } $\displaystyle 1191$-$\displaystyle 1$
(i)
Draw a diagram showing the magnetic field lines around a bar magnet. Write any two characteristics of magnetic field lines.
(ii)
Write the statement of Right hand thumb rule.
(iii)
The concentric circles representing the magnetic field around a current carrying straight wire become larger and larger as we move away from the wire. How does magnetic field change on these concentric circles ?
(i)
Draw a diagram, showing the magnetic field lines in and around the current carrying solenoid. Write any two salient features of these lines.
(ii)
What is an electromagnet and how is it made ? { } $\displaystyle 1191$-$\displaystyle 1$
Marking-scheme solution
(A) (i)
Characteristics:
Characteristics:The magnet field lines emerge from north pole and merge at south pole. Inside the magnet, the direction of field lines is from its south pole to its north pole. Thus, the magnetic field lines are closed curves.
The relative strength of the magnetic field is shown by the degree of closeness of the field lines.
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CBSE Class 10 Science past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.