Physics-Unit 1

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1. Why is a high voltage used?

  • So they can transfer the electricity at a high current
  • It decreases the amount of energy wasted in cables
  • The cables cannot transfer low voltage electricity
  • It increases the amount of energy wasted in cables
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Other questions in this quiz

2. Which type of electromagnetic wave has the smallest wavelength?

  • Gamma rays
  • Microwaves
  • Ultraviolet
  • Visible light

3. What is transferred through the National Grid?

  • Oil
  • Gas
  • Electricity
  • Coal

4. What does a decrease in wavelength of an object suggest?

  • That the object is stationary
  • That it is moving closer to the observer
  • It is moving away from the observer

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