WPH12/01 Jan 2026 P79144A MCQ Explained Edexcel IAL Physics

In this video, I explain all 10 MCQ questions from the Edexcel IAL Physics Unit 2 (WPH12/01) January 2026
paper step-by-step.
Perfect for students preparing for Edexcel IAL Physics exams.
What you will learn:

• Q1 – Diode I-V graph identification
• Q2 – Charge calculation: Q = It with unit conversion
• Q3 – Hydrogen energy levels: photon absorption (NOT possible energy)
• Q4 – LDR circuit: voltmeter and ammeter with increasing light
• Q5 – Phase difference from path difference λ/4
• Q6 – Wave speed on a string: tension and mass per unit length
• Q7 – Frequency vs wavelength graph shape (f ∝ 1/λ)
• Q8 – Potential difference across a length of uniform wire
• Q9 – Total internal reflection condition (critical angle)
• Q10 – Longitudinal waves: pressure and displacement at compressions/rarefactions

• Step-by-step working using exam techniques
• Tips to score full marks on each question
• Common mistakes to avoid

Paper Details:
Subject: Edexcel IAL Physics — Unit 2: Waves and Electricity
Paper Code: WPH12/01 | Paper ID: P79144A
Session: January 2026

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Видео WPH12/01 Jan 2026 P79144A MCQ Explained Edexcel IAL Physics канала Infinity Maths Pro