Electromagnetic Induction practice focused on flux, Faraday and Lenz laws, motional emf and inductance. Every preview below comes from NeetVellum's live original bank—not an unverified PYQ reconstruction.
flux, Faraday and Lenz laws, motional emf and inductance.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 1 · difficulty 1/5
A circular coil of 100 turns and radius 5.0 cm is placed in a uniform magnetic field of 0.20 T with its plane perpendicular to the field. The magnetic flux linked with the coil is (take π = 3.14):
A. 1.57 × 10⁻³ Wb
B. 1.57 × 10⁻² Wb
C. 0.157 Wb
D. 1.57 Wb
Example 2 · difficulty 1/5
A bar magnet is held with its north pole facing a closed circular conducting loop and is then moved towards the loop. Viewed from the side of the approaching magnet, the induced current in the loop flows:
A. clockwise, so that the loop attracts the magnet
B. anticlockwise, so that the loop repels the magnet
C. clockwise, because the magnetic flux through the loop is decreasing
D. anticlockwise, because the near face of the loop behaves as a south pole
Example 3 · difficulty 2/5
A metal rod of length 0.50 m moves with a velocity of 4.0 m s⁻¹ perpendicular to its own length, in a region where a uniform magnetic field of 0.25 T acts perpendicular to both the rod and its velocity. The EMF induced across the ends of the rod is:
A. 0.50 V
B. 0.125 V
C. 2.0 V
D. 0.05 V
The evidence-first practice loop
1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
2. Attempt closed-bookExpose the concept or execution gap before rereading.
3. Repair and returnClassify the miss and re-practice after a delay.