ConceptConceptDocsDocuments

Edexcel IGCSE Physics 2.21 Energy, Charge & Voltage: E = QV

Practise using E=QV for electrons, sparks, charged objects and components, including prefix conversion and rearrangement.

Syllabus
First assessment 2019
Course
Physics 4PH1

Exam points

  • convert kV, mC or μC into base units before using E=QV
  • rearrange E=QV to calculate charge or potential difference from energy data
  • combine Q=It with E=QV when current and charging time are also supplied

2.21 Energy, charge and voltage question 1

[Maximum number: 2]

The student extends the investigation by recording additional data for the lamp.

This is her method.
For each voltage
- switch the current on for 45 seconds
- record the current and colour of the lamp
- calculate the power and the energy transferred by the lamp

The table shows the student's results.

Table for Question 2.21 Energy, charge and voltage question 1 — Edexcel IGCSE Physics

Calculate the missing value of energy for the voltage of 4.0 V.

Give your answer to 2 significant figures.

energy = .......... J

Table for Question 2.21 Energy, charge and voltage question 1 — Edexcel IGCSE Physics
All question bank results loaded