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 Electricity and Magnetism 36 Flashcards |
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What is the only natural magnet known to us? |
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Magnetite (Fe₃O₄) |
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Which type of magnet is created by humans? |
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Artificial magnet |
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True or False: The poles of a magnet are where the magnetic force is weakest. |
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False. The poles of a magnet are where the magnetic force is strongest. |
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Fill in the blank: A magnet that can move freely always points in the ______ direction. |
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North-south |
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Which part of the electric bell is responsible for producing sound? |
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Hammer |
Card: 10 / 36 |
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Riddle: I can attract iron and always point north, yet I am not alive. What am I? |
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A magnet |
Card: 12 / 36 |
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What happens when like poles of magnets are brought together? |
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They repel each other. |
Card: 14 / 36 |
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How is an electromagnet created? |
Card: 15 / 36 |
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By passing an electric current through a solenoid with an iron core. |
Card: 16 / 36 |
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True or False: Electromagnets retain their magnetism even when the electric current is turned off. |
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False. Electromagnets are temporary magnets and lose their magnetism when the current stops. |
Card: 18 / 36 |
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Fill in the blank: The unit of electric charge is called ______. |
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Coulomb |
Card: 20 / 36 |
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Which of the following is a good conductor of electricity? A) Wood B) Rubber C) Copper D) Plastic |
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C) Copper |
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What is the formula for calculating electric current? |
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I = Q / t |
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Riddle: I glow when electricity flows, but my wire is thin. What am I? |
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An electric bulb |
Card: 26 / 36 |
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What happens to the resistance in a series circuit as more resistors are added? |
Card: 27 / 36 |
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The total resistance increases. |
Card: 28 / 36 |
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True or False: In a parallel circuit, if one bulb fails, all bulbs go out. |
Card: 29 / 36 |
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False. In a parallel circuit, other bulbs continue functioning independently. |
Card: 30 / 36 |
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Fill in the blank: The measure of resistance is denoted in ______. |
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Ohms (Ω) |
Card: 32 / 36 |
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Which component in an electric circuit can convert electrical energy into heat and light? |
Card: 33 / 36 |
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Resistor or filament in a bulb |
Card: 34 / 36 |
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What does the term 'electromagnetism' refer to? |
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The study of the connection between electricity and magnetism. |
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Completed! Keep practicing to master all of them. |
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