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NCERT Class 10 Science Magnetic Effects of Electric Current: In-text questions (page 201) Solutions
AI-written, checked on 23 Oct 2026
Solutions written by Shishya, checked — not the board's official answers
Step-by-step working for every question of In-text questions (page 201) in NCERT's Class 10 Science book, chapter “Magnetic Effects of Electric Current”, written by Shishya. Each question is in our own short words; open the NCERT chapter for the exact wording and figures.
How these were checked: the solutions were drafted with AI and then read and corrected on 23 Oct 2026. Every numerical final answer is recomputed from the question's own numbers by a calculator check that runs before each release; proofs and explanations were read, not machine-checked. The NCERT textbook is the authority — if something here disagrees with it, follow the book.
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In-text (page 201) Q1
A circular wire loop lies flat on a table with current flowing clockwise. Use the right-hand rule to find the direction of the magnetic field inside and outside the loop.
- Imagine the circular loop as a collection of small straight wire segments.
- Apply the right-hand thumb rule to each small segment: curl the fingers in the direction of current and the thumb points to the magnetic field.
- Since the current flows clockwise, the magnetic field lines point downwards (into the table) at the center of the loop.
- The magnetic field lines form closed loops, so they must return upwards (out of the table) on the other side of the loop.
- Therefore, the magnetic field is directed downwards inside the loop and upwards outside the loop.
Answer: The magnetic field is directed downwards (into the table) inside the loop and upwards (out of the table) outside the loop.
In-text (page 201) Q2
The magnetic field in a region is uniform. Describe a diagram that represents it.
- A uniform magnetic field has the same strength and direction at every point in the region.
- To represent this, draw a set of parallel straight lines.
- All the lines must be equally spaced from each other.
- The lines should be parallel to indicate that the field direction is constant everywhere.
- This arrangement shows that the magnetic field is uniform in both magnitude and direction.
Answer: A diagram with equally spaced, parallel straight lines represents a uniform magnetic field.
In-text (page 201) Q3
The magnetic field inside a long straight current-carrying solenoid (a) is zero (b) decreases towards its ends (c) increases towards its ends (d) is the same at all points.
- A solenoid is a long coil of wire through which current flows.
- The magnetic field lines inside a long straight solenoid are parallel to each other.
- These field lines form concentric circles around the wire and are uniform in strength inside the coil.
- The field strength is constant throughout the interior of the solenoid, excluding the ends.
- Therefore, the magnetic field is the same at all points inside the solenoid.
Answer: (d) is the same at all points
Other exercises in this chapter
- In-text questions (page 200) — 3 questions
- In-text questions (page 203) — 3 questions
- In-text questions (page 205) — 3 questions
- End-of-chapter exercises — 9 questions
← Magnetic Effects of Electric Current: notes, practice and all exercises
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