✓ Board-verified
Science · 2025 · 5 marks
CBSE 2025 · Region 2 · Set 1 · Q36
(a) The given figure shows the current passing through the straight conductor XY. (i) Copy the diagram and draw the magnetic field lines when current…
The given figure shows the current passing through the straight conductor XY.
(i)
Copy the diagram and draw the magnetic field lines when current flows from conductor X to Y.
(ii)
Name and state the rule used in determining the direction of the magnetic field lines in the situation given above.
(iii)
State Fleming's left hand rule. Using this rule, determine the direction of force applied on an electron entering a uniform magnetic field as shown in the figure.
(i)
Define the term solenoid. Draw the pattern of the magnetic field lines in and around a current carrying straight solenoid. Mark on the pattern the (i) direction of current,
(ii)
direction of field lines near the ends of the solenoid, and
(iii)
region where the magnetic field is uniform.
(ii)
How would you make an electromagnet using a current carrying solenoid ?
Marking-scheme solution
(a)(i)
(ii)
Right hand thumb rule
Statement of the rule - Imagine holding a current carrying straight conductor in the 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.
(iii)
According to Fleming's left-hand rule, 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.
Out of the plane/ upwards
(b) (i) Solenoid is a coil of many turns of insulated copper wire wrapped closely in the shape of a cylinder.
Diagram Marking (i), (ii) and (iii)
(ii)
By inserting a piece of magnetic material like soft iron inside the current carrying solenoid.
All Magnetic Effects of Electric Current questions2025 question paperNCERT solutions: Magnetic Effects of Electric CurrentPractice Magnetic Effects of Electric Current →
More from Magnetic Effects of Electric Current
- On the basis of the given circuit arrangement, answer the following questions: What happens to the rod AB when the key K is closed and why? Name and…2026
- Draw the pattern of magnetic field lines produced by a current carrying circular loop showing the direction of current in the loop and the direction…2022
- Name and state the rule to determine the direction of a: (i) magnetic field produced around a current carrying straight conductor. (ii) force…2024
- A rectangular loop ABCD carrying a current I is situated near a straight conductor XY, such that the conductor is parallel to the side AB of the loop…2024
- Draw a labelled diagram to show the pattern of magnetic field lines produced due to a current carrying straight conductor. Mark on it the direction…2024
- The magnetic field inside a long straight current carrying solenoid:2023
- AB is a coil of copper wire having a large number of turns. The ends of the coil are connected with a galvanometer as shown. When the north pole of a…2022
- AB is a coil of copper wire having a large number of turns. The ends of the coil are connected with a galvanometer as shown. When the north pole of a…2022
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.