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.
Work it out in your head or on paper, then tap your answer — or type it and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
🏁 Lesson 7 test
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
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