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 Electricity and Circuits 30 Flashcards |
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What is the primary role of the battery in an electric circuit? |
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The battery supplies energy to the circuit, allowing electric current to flow from the negative terminal to the positive terminal. |
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Fill in the blank: Electric current is the flow of ___ carried by electrons. |
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Electric charge |
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True or False: Resistance in a circuit decreases the energy required to maintain the flow of current. |
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False. Resistance makes it harder for current to flow, requiring more energy to maintain the flow. |
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In the rope loop model of electric current, what does tightening the grip on the rope represent? |
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Tightening the grip on the rope represents resistance in the circuit. |
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Riddle: I help power your devices but am invisible to the eye. I flow from one terminal to another, completing a circuit. What am I? |
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Electric current |
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List two components in a circuit that control the flow of electrons. |
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Resistors and switches |
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Fill in the blank: Conductors are materials with electrons that can move freely, making it easy for electric current to flow, while ___ are materials that do not allow electric current to flow easily. |
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Insulators |
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What happens to electrical energy in a lamp with a filament? |
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The filament offers resistance and converts electrical energy to heat and light, causing the lamp to illuminate. |
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What materials are considered good electrical conductors? |
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Good electrical conductors include metals such as copper, aluminum, and gold. |
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Insulators are materials that ___ because the electrons cannot move as freely through them. |
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Do not conduct electricity well |
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True or False: Rubber and plastic are examples of electrical conductors. |
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False. Rubber and plastic are examples of insulators. |
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What is the primary function of insulators in electrical circuits? |
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 Insulators are used to coat wires and protect against electric shocks. |
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In a circuit diagram, what does a switch do? |
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A switch interrupts the flow of electricity in a circuit; when open, the circuit is incomplete, and when closed, electricity can flow. |
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Riddle: I can be connected in a single path or multiple loops. What am I? |
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A circuit; specifically, a series circuit or a parallel circuit. |
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Fill in the blank: The brightness of lamps in a circuit increases with ___ current. |
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Higher |
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Completed! Keep practicing to master all of them. |
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