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Science · 2025 · 3 marks
Magnetic Effects of Electric CurrentForce on a Current-carrying Conductor and Fleming's Left-Hand Rule3 marksUnderstandshort answer
CBSE 2025 · Region 3 · Set 3 · Q32
(a) Name and state the rule which determines the force on a current carrying conductor placed in a uniform magnetic field. (b) Consider the following…
(a)
Name and state the rule which determines the force on a current carrying conductor placed in a uniform magnetic field.
(b)
Consider the following three diagrams in which the entry of a positive charge (+Q) in a magnetic field is shown. Identify giving reason the case in which the force experienced by the charge is
(i)
maximum, and (ii) minimum. I.
II. III.
Marking-scheme solution
(a) Fleming's Left hand rule
Statement : Stretch the thumb, fore figure and the middle figure of your left hand such that they are mutually perpendicular. If the first finger points in the direction of field (F) and the second finger in the direction of current, then the thumb will point in the direction of the force acting on the conductor.
(b) (i) Maximum in Case III - Magnetic field and current/motion of charge are perpendicular to each other.
(ii)
Minimum in Case I Magnetic field and current/motion of charge are parallel to each other.
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CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.