Current Electricity practice focused on circuits, cells, resistance combinations, metre bridges and electrical power. Every preview below comes from NeetVellum's live original bank—not an unverified PYQ reconstruction.
circuits, cells, resistance combinations, metre bridges and electrical power.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 1 · difficulty 2/5
A steady current of 1.36 A flows through a copper wire of uniform cross-sectional area 1.0 × 10⁻⁶ m². If the free electron density of copper is 8.5 × 10²⁸ m⁻³ and e = 1.6 × 10⁻¹⁹ C, the drift speed of electrons in the wire is:
A. 1.0 × 10⁻⁴ m s⁻¹
B. 5.0 × 10⁻⁵ m s⁻¹
C. 1.0 × 10⁻³ m s⁻¹
D. 1.0 × 10⁻² m s⁻¹
Example 2 · difficulty 2/5
A cell of emf 12 V and internal resistance 0.5 Ω drives a current through an external resistor R. The terminal voltage of the cell is measured to be 11 V. The value of R is:
A. 6.0 Ω
B. 5.5 Ω
C. 24.0 Ω
D. 11.0 Ω
Example 3 · difficulty 3/5
In a metre bridge experiment, a known resistance of 6 Ω is connected in the left gap and an unknown resistance X in the right gap. The null point is obtained at 40 cm from the left end of the wire. The value of X is:
A. 4 Ω
B. 6 Ω
C. 9 Ω
D. 15 Ω
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.