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Science · 2026 · 5 marks
CBSE 2026 · Region 2 · Set 1 · Q39
Attempt either (a) or (b): (a) (i) State the rule which gives the direction of force acting on a current-carrying conductor placed in a magnetic…
Attempt either (a) or (b) :
(i)
State the rule which gives the direction of force acting on a current-carrying conductor placed in a magnetic field.
(ii)
What is a fuse ? Why is it called a safety device ?
(iii)
Why are electrical appliances with metallic bodies connected to the mains through a three-pin plug, whereas an electric bulb is connected with a two-pin plug?
(iv)
What will be the direction of force experienced by the conductor AB due to the magnetic field, when current flows in the direction shown ? Name the law you applied to find the direction.
(i)
Draw the pattern of magnetic field lines through and around a current-carrying circular loop.
(ii)
State the rule to find out the direction of the magnetic field inside and around the circular loop.
(iii)
Give reasons :
(I)
Why should a burnt-out fuse be replaced by another fuse of identical rating only, in an electric circuit ?
(II)
Why is soft iron-core used in making an electromagnet ?
Marking-scheme solution
(a) (i) Stretch the thumb, fore finger and middle finger of your left hand such that they are mutually perpendicular. If the first finger (forefinger) points in the direction of the magnetic field and the middle finger (second finger) in the direction of the current, then the thumb will point in the direction of motion or the force acting on the conductor.
All Magnetic Effects of Electric Current questions2026 question paperNCERT solutions: Magnetic Effects of Electric CurrentPractice Magnetic Effects of Electric Current →
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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.