Q20 IB Physics HL Past Paper Solution May 2022 Paper 1 TZ 1 #ibdp #physics

Welcome to ZuAI - Ace Your IB Exams! In today’s video, we’ll break down a common IB Physics problem involving circuit analysis, specifically focusing on how the removal of a resistor impacts the potential at a specific point in the circuit. This type of question is critical for understanding circuit behavior, an essential topic in the IB Physics syllabus.

Question Breakdown:

The circuit consists of three identical resistors, each with a resistance of 10Ω.
The battery has an emf of 12V and negligible internal resistance.
We are asked to determine how the potential at point X changes when the resistor L is removed from the circuit.
Solution:
To solve this problem, we’ll go through the following steps:

Initial Circuit Analysis: Understand the distribution of voltage across the resistors when all three are connected.
Effect of Removing Resistor L: Recalculate the potential distribution when L is removed, considering the changes in the current and the potential drop across the remaining resistors.
Determine the Potential Change: Compare the potential at point X before and after the removal of resistor L to find the correct answer.
By the end of this video, you’ll have a solid grasp of how to approach and solve potential difference questions in circuits, preparing you to ace similar problems in your IB Physics exams!

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