How do I revise E2E stub topic for OCR GCSE?

Practice rearranging the equation V=IR to solve for any variable mentally before writing steps.

What exam tips are there for E2E stub topic? (2)

For graph questions, always check if the origin is included and whether the line is straight or curved.

What exam tips are there for E2E stub topic? (3)

In practical write-ups, clearly state the independent, dependent, and control variables.

What mistakes should I avoid in E2E stub topic?

Confusing current and voltage as the same physical quantity.

What are common errors in E2E stub topic exams? (2)

Misapplying Ohm's Law by recalculating without adjusting for temperature-induced resistance changes in non-ohmic conductors.

How to Revise E2E stub topic — OCR GCSE Physics

E2E stub topic is a topic in the OCR GCSE Physics specification. This guide covers learning objectives, examiner tips, common mistakes, and key terminology to help you revise effectively.

Examiner Tips for E2E stub topic

Practice rearranging the equation V=IR to solve for any variable mentally before writing steps.
For graph questions, always check if the origin is included and whether the line is straight or curved.
In practical write-ups, clearly state the independent, dependent, and control variables.
When explaining energy transfers, relate power to current and voltage using P=IV.

Common Mistakes in E2E stub topic

Confusing current and voltage as the same physical quantity.
Misapplying Ohm's Law by recalculating without adjusting for temperature-induced resistance changes in non-ohmic conductors.
Assuming that adding resistors in parallel always increases total resistance.
Forgetting to convert milliamperes to amperes before using the equation.

Key Marking Points

Award credit for correctly plotting a current-voltage graph with labelled axes and line of best fit.
Expect use of the correct equation V=IR with substitutions and unit conversions.
Look for identification of control variables in a resistance experiment, such as temperature and wire material.
Credit description of how resistance changes with wire length, including proportionality.

Read the E2E stub topic Study Guide →

← Back to OCR GCSE Physics

E2E stub topic

OCR

GCSE

This subtopic focuses on the fundamental principles of electrical circuits, including the relationships between current, voltage, and resistance. Students explore how components behave and how energy is transferred in circuits, applying these concepts to real-world electrical systems.

Objectives

Exam Tips

Pitfalls

Key Terms

Mark Points

What You Need to Demonstrate

Key skills and knowledge for this topic

Award credit for correctly plotting a current-voltage graph with labelled axes and line of best fit.
Expect use of the correct equation V=IR with substitutions and unit conversions.
Look for identification of control variables in a resistance experiment, such as temperature and wire material.
Credit description of how resistance changes with wire length, including proportionality.

Marking Points

Key points examiners look for in your answers

Award credit for correctly plotting a current-voltage graph with labelled axes and line of best fit.
Expect use of the correct equation V=IR with substitutions and unit conversions.
Look for identification of control variables in a resistance experiment, such as temperature and wire material.
Credit description of how resistance changes with wire length, including proportionality.

Examiner Tips

Expert advice for maximising your marks

💡Practice rearranging the equation V=IR to solve for any variable mentally before writing steps.
💡For graph questions, always check if the origin is included and whether the line is straight or curved.
💡In practical write-ups, clearly state the independent, dependent, and control variables.
💡When explaining energy transfers, relate power to current and voltage using P=IV.

Common Mistakes

Pitfalls to avoid in your exam answers

Confusing current and voltage as the same physical quantity.
Misapplying Ohm's Law by recalculating without adjusting for temperature-induced resistance changes in non-ohmic conductors.
Assuming that adding resistors in parallel always increases total resistance.
Forgetting to convert milliamperes to amperes before using the equation.

Study Guide Available

Comprehensive revision notes & examples

Read Study Guide

Key Terminology

Essential terms to know

Ohm's Law
Circuit components and symbols
Energy and power in circuits
Factors affecting resistance
Practical circuit investigations

Ready to test yourself?

Practice questions tailored to this topic

E2E stub topic

What You Need to Demonstrate

Marking Points

Examiner Tips

Common Mistakes

Study Guide Available

Key Terminology

Ready to test yourself?

Related Topics in OCR GCSE Physics

Global challenges

Matter

Forces

Magnetism and magnetic fields