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  Main Electricity Current & Potential Difference Questions III.2.1 Electricity

Questions III.2.1

  1. How many electrons must be removed from an electrically neutral toonie to give it a charge of +4.8 C ?
  2. A metal sphere has a charge of +7.5 C. What is the net charge after 8.9 x 1014 electrons have been placed on it?
  3. A rod has a charge of -1.8 C. How many electrons must be removed so that the charge becomes +4.5 C?
  4. A pocket calculator battery delivers 0.17 mA. In 1 hour how much charge flows through the calculator?
  5. A walkman is designed to play for 2.0 hours on a fully charged battery pack. If the battery pack provides a total of 170 C of charge, how much current does the walkman use?
  6. Residential wiring can safely handle 15 A of current. At this current level, how much charge flows through a wire in 5 hours?
  7. A car battery charger delivers 9.0 A for 2.5 hours to a dead battery with a constant 12 V across the battery terminals. How much charge flows through the battery?

 

 

 

 

Electricity




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