Practice Quiz

Praxis II Physics Content Knowledge Exam Prep - Question List

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6. How much power is required to carry a 35 N package a vertical distance of 18 m if the work on the package is accomplished in 30 s?
  1. 16 W
  2. 21 W
  3. 58 W
  4. 630 W
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7. The power of a toaster can be determined if which of the following values are known?
  1. the dimensions of the toaster
  2. the resistance of the toaster’s insulation
  3. the voltage applied to the toaster and the toaster’s temperature
  4. the current through the circuit and the voltage applied to the toaster
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8. When one end of a short metal bar is heated, the opposite end will eventually become hot. Which of the following processes transfers the heat through the bar?
  1. condensation
  2. conduction
  3. convection
  4. radiation
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9. Why does a plastic rod have a negative charge after being rubbed with a piece of fur?
  1. The fur gives up protons to the rod.
  2. The rod gives up electrons to the air.
  3. The fur gains protons from the rod.
  4. The rod gains electrons from the fur.
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10. The motor of one car is more powerful than the motor of another car. Which of the following must be true of the more powerful motor?
  1. It can do work more quickly.
  2. It can operate for a longer time.
  3. It can burn fuel more eficiently.
  4. It can store more potential energy.
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