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Science · 2024 · 3 marks
CBSE 2024 · Region 2 · Set 2 · Q32
(a) State Fleming's left hand rule. Apply this rule to determine the direction of force experienced by a straight current carrying conductor AB…
(a)
State Fleming's left hand rule. Apply this rule to determine the direction of force experienced by a straight current carrying conductor AB placed in a uniform magnetic field as shown.
(b)
What will happen to an electron which enters in the same field in the same direction in which the current is flowing in the conductor AB ? Give reason to justify your answer.
Marking-scheme solution
(a)
Stretch the thumb, forefinger and middle finger of your left hand such that they are mutually perpendicular. If the first finger points in the direction of magnetic field and the second finger in the direction of current, then the thumb will point in the direction of motion or the force acting on the conductor.
Direction of force vertically downwards/Into the page
(b)
Electron will experience force in vertically upward direction/ will deflect out of the page.
Reason: Direction of flow of electrons is opposite to the direction of current in AB.
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CBSE Class 10 Science past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.