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Current Electricity — Concept Maps

Punjab Board · Class 12 · Physics

3 concept maps of Current Electricity for Punjab Board Class 12 Physics, each also written out as a text outline.

45 questions30 flashcards8 formulas & key relations5 concepts

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A standard circuit diagram of a Wheatstone bridge, showing four resistors, a galvanometer, and a battery, highlighting the balanced condition.
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An illustration from Super Tutor's Current Electricity chapter — alongside flashcards, concept maps and practice questions.

3 Concept Maps

Flowchart showing how current is defined from charge flow, the formula, units, and practical examples

Flowchart showing how current is defined from charge flow, the formula, units, and practical examples

The map in words

  • Charges Moving Through Conductor
    • Q coulombs in t seconds
      • Current I = Q/t
        • SI Unit: Ampere A
          • 1 A = 1 C/s
            • Examples: Bulb ~0.43A Lightning ~10000s A Nerve ~microA

Flowchart illustrating the free electron model in conductors with and without electric field

Flowchart illustrating the free electron model in conductors with and without electric field

The map in words

  • Metal Conductor
    • Positive Ion Lattice
    • Free Electron Sea
  • No Electric Field
    • Random Thermal Motion
      • Random Collisions
        • No Preferential Direction
          • Zero Net Current
  • Applied Electric Field
    • Directed Motion Superimposed
      • Drift Velocity
        • Electric Current Flows

Flowchart showing Ohm's law and its three forms for calculating V, I, or R

Flowchart showing Ohm's law and its three forms for calculating V, I, or R

The map in words

  • Ohm's Law
    • V = IR
      • Given any two quantities
        • V and I known: Find R = V/I
          • Resistance in Ohms
        • V and R known: Find I = V/R
          • Current in Amperes
        • I and R known: Find V = IR
          • Voltage in Volts

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Frequently Asked Questions

What are the important topics in Current Electricity for Punjab Board Class 12 Physics?
Key topics in Current Electricity include Electric Current and Current Density, Ohm's Law and Resistance, Drift Velocity, Relaxation Time, and Mobility, Temperature Dependence of Resistivity. Study these first, then practise questions on each for the Punjab Board Class 12 board exam.
What do the concept maps for Current Electricity show?
The 3 maps show how the ideas in Current Electricity connect: Flowchart showing how current is defined from charge flow, the formula, units, and practical examples; Flowchart illustrating the free electron model in conductors with and without electric field. Each map is also written out as an outline on this page.
How should I revise Current Electricity for the Punjab Board Class 12 board exam?
Learn the core ideas first, then work through the 45 practice questions on Current Electricity. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Current Electricity

All Punjab Board Class 12 Physics Concept Maps

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