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Science · 2025 · 5 marks
CBSE 2025 · Region 6 · Set 2 · Q36
(a) Study the following electric circuit diagram and answer the questions that follow: (i) What does the circuit diagram shows? (ii) What will happen…
(a)
Study the following electric circuit diagram and answer the questions that follow :
(i)
What does the circuit diagram shows ?
(ii)
What will happen if the direction of current is reversed ? Justify your answer giving circuit diagram.
(b)
Name and state the rule to determine the direction of magnetic field associated with a straight current carrying conductor.
(a)
Draw the pattern of magnetic field lines of
(i)
a bar magnet
(ii)
a current carrying solenoid List two distinguishing features between the two magnetic fields.
(b)
Study the following three diagrams in which the entry of an electron in a magnetic field is shown. Identify the case in which the magnetic force experienced by the electron is (i) maximum, and (ii) minimum. Give reason for your answers in each case.
(A)
(B)
(C)
Marking-scheme solution
(a)
(i)
Deflection of a compass needle, when placed near a current-carrying straight wire/the electric current through the conductor produces a magnetic effect
(ii)
If the direction of the current is reversed, the compass needle deflects in the opposite direction
(b)
Right hand thumb rule
Rule: Imagine that you are holding a current-carrying straight conductor in your right hand such that the thumb points towards the direction of current, then the fingers will wrap around the conductor in the direction of the field lines of the magnetic field.
(i)
(ii)
Two differences:
| BAR MAGNET | CURRENT CARRYING SOLONEOID |
| Strength of magnetic field is fixed | Strength of magnetic field can be changed |
| Polarity is fixed | Polarity can be changed |
All Magnetic Effects of Electric Current questions2025 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 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.