Ch. 17 and 18 Test Review
Quiz by Tracy
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20 questions
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- Q1A semiconductor device that controls the flow of electricity in one direction is called ______.a conductora superconductoran insulatora diode30s
- Q2Which one converts mechanical energy into electrical energy?a motora generator30s
- Q3Which is not an example of an insulator?woodcopperplasticrubber30s
- Q4What happens if you heat a permanent magnet?loses magnetic propertiesgets strongerstays the same30s
- Q5Where is the magnetic field of a magnet the strongest?at the south pole onlyat the polesin the centerat the north pole only30s
- Q6What direction does a compass point?westsouthnortheast30s
- Q7A superconductorhas a lot of resistancehas zero resistance30s
- Q8An electric motor covertselectrical energy to mechanicalmechanical energy to electrical30s
- Q9Wrapping a copper wire around a iron and attaching it to a battery createsan electromagneta magneta series circuita parallel circuit30s
- Q10What does a transistor do?turns electrical flow on and offis an insulatorcreates a magnet30s
- Q11An insulatordoes allow electrons to flowdoes not allow electrons to flow30s
- Q12A light emitting diode (LED is asuperconductorsemiconductor30s
- Q13Transistors and semiconductors are used toinsulate signalscreate a magnetic fieldamplify electrical signals30s
- Q14Electric bills are calculated inkilowatt hoursnewtonsvoltsjoules30s
- Q15In magnetsopposites repellike charges attractopposites attract30s