Charge, Current, Time

• What is the definition of charge in the context of electricity?

  Charge is a measure of the total current that flowed within a certain period of time.
• How can the concept of charge be explained using a water analogy?

  Charge is analogous to the total amount of water that has flowed down a hill within a certain period of time.
• What symbol is used to represent charge?

  Charge is represented by the letter q.
• In what unit is charge measured?

  Charge is measured in coulombs, represented by the symbol C.
• What is the equation used to calculate charge?

  The equation is charge (q) equals current (i) multiplied by time (t).
• If a kettle draws a current of 12 amps for 50 seconds, how much charge passes through the wire?

  600 coulombs.
• How do you calculate the current flowing through a phone charger that transfers 43.2 kilo coulombs over two hours?

  First, rearrange the equation to i = q / t, then convert units and calculate.
• How do you convert 43.2 kilo coulombs to coulombs?

  Multiply 43.2 by 1000 to get 43,200 coulombs.
• How do you convert two hours into seconds?

  Multiply two hours by 60 to get minutes, then multiply by 60 again to get seconds, resulting in 7200 seconds.
• What is the current flowing through the wire if 43,200 coulombs pass in 7200 seconds?

  6 amps.
• What is the total charge that a phone charger transfers in the example given?

  43.2 kilo coulombs.
• What is the relationship between charge, current, and time?

  Charge is the product of current and time.