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start learning
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A battery creates a difference in charge and makes electrons flow, which produces electric current.
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Why does the toaster get hot but not the cable? start learning
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The toaster has high resistance, which converts electrical energy into heat. The cable has low resistance, so it does not heat up.
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Why does a balloon stick to the wall? start learning
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When rubbed, the balloon gains electrons and becomes negatively charged. It attracts positive charges in the wall, so it sticks.
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What is voltage (spänning)? start learning
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Voltage is the difference in charge between two points that causes current to flow.
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What is resistance (resistans)? start learning
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Resistance is the opposition to the flow of electric current.
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What is current (strömstyrka)? start learning
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Current is the amount of electric charge flowing through a circuit over time.
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🔗 What is a series koppling(serie koppling)? start learning
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A series koppling is when components are connected in a single path. If one part breaks, the whole circuit stops working.
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🔀 What is a parallel koppling (parallel koppling)? start learning
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A parallel kopling has multiple paths for current. If one part breaks, the others still work.
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💡 How to connect 3 batteries for the strongest light? start learning
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Connect them in series (positive to negative) to increase voltage and make the light brighter.
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⚛️ Which part of the atom is negative? start learning
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The electron is negatively charged.
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What happens during lightning? start learning
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Charges build up in clouds, and when the difference becomes large, a sudden electrical discharge occurs — lightning.
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What are conductors (ledare)? start learning
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Conductors are materials that allow electricity to flow easily because electrons can move freely
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What are insulators (isolatorer)? start learning
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Isulators are materials that do not allow electricity to flow because electrons cannot move freely.
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