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Engineers draw circuits with symbols because they are quick and clear everywhere. A cell is a long thin line and a short thick line (the long line is +); a battery is two or more cell symbols. A bulb is a circle with a cross, a switch is a line lifted at a gap, a resistor is a plain rectangle, a diode is a triangle against a bar and an LED is the same with two arrows coming out. Wires are straight lines and a dot shows where wires join.
✓ You passed this lesson’s test.
Shape tells the part — “each part has one simple drawing that everyone understands”
Use it for: Reading and drawing circuit diagrams in science, following kit instructions and before reading any circuit plan.
Check: A circle with M would be a motor, not a bulb ✓
▶ Watch it animatedWork it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the ✏️ Symbol Sketcher badge when you pass — and a certificate when you finish all 10 lessons of Part 1 · Electricity basics. You can still take the test without signing in.
Why does it work? When should you use it? Ask in English, मराठी or हिंदी.
Sign in with Google to ask Free — 20 questions a day.
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