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Science · 2026 · 3 marks
CBSE 2026 · Region 1 · Set 1 · Q36
(a) Describe an activity to show that a current carrying conductor, placed in an external magnetic field experiences a force. (b) Imagine that you…
(a)
Describe an activity to show that a current carrying conductor, placed in an external magnetic field experiences a force.
(b)
Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally towards the front wall from the back wall, is deflected by a strong magnetic field to your right side. Find the direction of the magnetic field.
Marking-scheme solution
(a) Procedure
Take a small aluminium rod AB and using two connecting wires suspend it horizontally from a stand.
Place a strong horse-shoe magnet in such a way that the rod lies between the two poles perpendicularly.
Connect the aluminium rod in series with a battery and a key. Now pass a current through the aluminium rod from one end to another.
(Procedure can also be explained with a Diagram)
Observation
It is observed that the rod is displaced on passing current though it.
(Procedure can also be explained with a Diagram)
Observation
It is observed that the rod is displaced on passing current though it.(b) Magnetic field will be vertically downwards.
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CBSE Class 10 Science past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.