Скачать или смотреть Phase of A.C | Class 12 Physics Chapter 20 | Alternating Current | Federal Board

Phase of A.C | Class 12 Physics Chapter 20 | Alternating Current | Federal Board NBF Book 2025

AC Through Resistor, Inductor & Capacitor | Class 12 Physics Lecture | Alternating Current FBISE

Welcome to our Class 12 Physics Lecture Series 2025 (Federal Board – NBF Book).

In this video, we will explain Topic 20.4: Phase of Alternating Current (A.C) from Chapter 20: Alternating Current.
This lecture includes complete concepts of A.C through Resistor, Inductor, and Capacitor, following the Federal Board (FBISE) 2025 New Syllabus.

⚡ What You’ll Learn in This Lecture:

What is the Phase of A.C and how it changes with time

A.C through a Resistor – Voltage and Current in same phase

A.C through an Inductor – Current lags behind Voltage by 90°

A.C through a Capacitor – Current leads Voltage by 90°

Phase Difference and Phasor Diagrams

Mathematical equations for current and voltage in A.C circuits

Real-life applications of phase differences in electric circuits

🎯 Why This Lecture Is Important:

100% aligned with Federal Board (FBISE) & NBF Book (New Edition 2025)

Perfect for board exam preparation and conceptual clarity

Includes formulas, equations, and phase graphs explained step-by-step

Taught in simple Urdu-English mix for easy understanding

📚 Subject: Physics (Class 12 / 2nd Year)
🏫 Board: Federal Board (FBISE)
📖 Book: NBF Physics (New Edition 2025)
📺 Chapter: 20 – Alternating Current
📌 Topic: 20.4 – Phase of A.C
🧭 Subtopics:
 • A.C through Resistor
 • A.C through Inductor
 • A.C through Capacitor

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