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Resistor Drawing MicroSim

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Description

This MicroSim demonstrates how to draw resistor symbols in circuit diagrams. Resistors are components that resist the flow of electric current and are represented by a zig-zag pattern in circuit schematics (US/international style). The simulation shows multiple resistors with different resistance values (220Ω, 1KΩ, 10KΩ, 100KΩ) in both horizontal and vertical orientations.

Key features:

  • Toggle between horizontal and vertical resistor orientations
  • Multiple resistors with labeled values (ohms and kilohms)
  • Adjustable line width for the symbol drawing
  • Clear visualization of the zig-zag pattern (6 peaks standard)

How to Use

  1. Click Switch to Vertical or Switch to Horizontal to change resistor orientation
  2. Observe the four resistors with their resistance values
  3. Adjust the Line Width slider to change the thickness of the lines
  4. Click Reset to return to default settings

Lesson Plan

Learning Objectives

After completing this lesson, students will be able to:

  • Recognize the resistor symbol in circuit diagrams (zig-zag pattern)
  • Understand that resistors limit current flow in circuits
  • Read resistance values using standard units (Ω, KΩ, MΩ)
  • Draw proper resistor symbols in circuit diagrams

Target Audience

  • Grade level: Middle school to high school (grades 6-10)
  • Prerequisites: Basic understanding of electrical components and Ohm's Law

Activities

  1. Exploration Activity: Toggle between orientations and observe how the resistor symbol maintains its zig-zag pattern regardless of direction.

  2. Guided Investigation: Discuss the different resistance values shown. Ask: "Which resistor allows the most current to flow? Which allows the least?"

  3. Extension Activity: Research the resistor color code and learn how physical resistors are labeled with colored bands.

Assessment

  • Discussion question: Why is the resistor symbol drawn as a zig-zag pattern?
  • Reflection prompt: Where might you find resistors in everyday electronic devices?
  • Demonstrate understanding by explaining the relationship between Ω, KΩ, and MΩ units

References