Comprehensive solved notes on Unit 11 Electricity for Class 11 Physics students under the Federal Board of Intermediate and Secondary Education (FBISE), Islamabad. Similar to high-quality notes provided in institutions like APS, IMCB Islamabad, and other federal board colleges. Prepared by Hamdard Science Academy for the new NBF course (Cantab publisher). Covers drift velocity, electric potential, emf, maximum power, resistance temperature variation, and more. Includes solved examples, derivations, MCQs, short questions, long questions, numericals, and assignments. For complete guide, solutions, easy notes, and help, download the full PDF at http://hsanotes.com. Join online classes at : sharjeelmuhammad27@gmail.com
11.1 Drift Velocity in Unit 11 Electricity FBISE Class 11 Physics
Drift velocity (v_d) is average velocity of electrons due to electric field. Derivation: I = n e A v_d.
Solved Example: Copper wire, I=1A, A=10^{-6} m², n=8.5×10^{28} m^{-3}, v_d=7.35×10^{-5} m/s.
Mobility: v_d = μ E.
More solved numericals in PDF.
11.2 Electric Potential in Unit 11 Electricity FBISE Class 11 Physics
Electric potential V = potential energy per unit charge. ΔV = ΔU / Q. 1 eV = 1.6×10^{-19} J.
Detailed short questions in PDF.
11.3 Electromotive Force and Maximum Power Output in Unit 11 Electricity FBISE Class 11 Physics
Emf ε, terminal V = ε – I r. Current I = ε / (R + r).
Maximum power when R = r, P_max = ε² / 4r.
Solved Example: ε=12V, r=1Ω, R=5Ω → I=2A, V=10V, P=20W; max P=36W at R=1Ω.
Assignments solved in PDF.
11.4 Variation of Resistance with Temperature in Unit 11 Electricity FBISE Class 11 Physics
R_t = R_0 [1 + α(T – T_0)].
Solved Example: R_0=10Ω at 20°C, α=0.0039 °C^{-1}, at 100°C → R_t=13.12Ω.
Resistivity ρ, R = ρ L / A.
Solved MCQs and long questions in PDF.
For remaining topics like LDR, thermistor, Kirchhoff’s laws, Wheatstone bridge, potentiometer, and applications – full explanations, solved problems, and assignments available in the PDF.
Ideal for students in FBISE-affiliated institutions like APS, IMCB Islamabad, F.G. Colleges, and others preparing for board exams.
Download complete solved notes PDF for unit 11 electricity FBISE class 11 physics at http://hsanotes.com.
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