Electromagnetism
Quiz by Gina Monger
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10 questions
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- Q1Which of the following does not use an electromagnet?electric motorhand-held compasselectric generatorgalvanometer30s
- Q2Which of the following is most likely an advantage of an electromagnet over a permanent magnet in an industrial application?An electromagnet is able to detect and measure a small electric currentAn electromagnet is able to transform electrical energy energy into mechanical energyAn electromagnet is more durable and resistant to industrial processesAn electromagnet can easily be de-magnetized by cutting off the current30s
- Q3Which of the following best describes how a powerful electromagnet could be used in a junkyard?It could convert electrical energy into mechanical energyIt could provide a voltage source for old electronic equipmentIt could move heavy objects made of ironIt could light up the area so workers can see at night30s
- Q4Amanda has a long piece of copper wire. She shapes the wire into a coil. What could Amanda do to create an electric current in the wire?submerge the wire into a pan of hot watermove a bar magnet in and out of the wire coilconnect the two free ends of the wire so that they form a closed pathshake the wire very quickly30s
- Q5What is the name for a coiled wire that is wrapped around the iron core of the electromagnet?generatormotorsolenoidtransformer30s
- Q6Jason wants to make a simple motor. He plans to wrap copper wire around a piece of cork and use a pin to secure the cork to an axle balanced between 2 bar magnets. When he connects the wire to a battery, he predicts the cork will spin. Why?When an electric current is present in the wire, it will produce a magnetic field that exerts a force on the bar magnets.When an electric current is present in the wire, it will cause electric charges to flow between the 2 bar magnets.When an electric current is present in the wire, it will generate heat in the form of electromagnetic radiation.When an electric current is present in the wire, it will cause the bar magnets to repel each other.30s
- Q7What is the best word to describe a system in which a magnet moves in a coil of wire to produce electrical energy?electromagnettransformermotorgenerator30s
- Q8What are two ways to increase the strength of an electromagnet?increase electric current and increase electromagnetic inductionincrease loops of wire in coil and increase electric currentincrease loops of wire in coil and increase the number of magnetsincrease loops of wire in coil and increase electromagnetic induction30s
- Q9The process of creating a current in a circuit by changing a magnetic field is called...electromagnetic fieldelectromagnetic radiationelectromagnetismelectromagnetic induction30s
- Q10What are the parts of an electromagnet?solenoid, iron core, motorsolenoid, iron core, tansformersolenoid, iron core, batterysolenoid, iron core, generator120s