Engineering Board Exam Reviewer · Voltage, Current and Resistance · easy

How much charge flows in 2 minutes if the current is 0.5 A?

  1. 1 C
  2. 0.25 C
  3. 60 C
  4. 30 C

Answer

C. 60 C

Solution

Q=It=(0.5 A)(120 s)=60 C.

More Voltage, Current and Resistance questions

  1. How much current flows if 2.4 C of charge passes a point in 0.8 s?
  2. A charge of 45 C flows past a point in 15 s. Find the current.
  3. A copper wire 50 m long has a resistance of 0.43, ( =1.72×10-8, · m). Find its diameter.
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  5. A wire of resistance 4, is drawn out uniformly to twice its original length (its volume stays the same). What is its new resistance?
  6. A 12 V battery is rated 60 Ah. For how many hours can it supply a steady 5 A?
  7. A resistor has color bands yellow, violet, brown, gold. What is its resistance?
  8. A copper coil has a resistance of 100, at 20° C. Find its resistance at 70° C (temperature coefficient of copper =0.00393/° C at 20° C).
  9. A copper wire has a resistance of 12, . A second wire of the same length and material has twice the diameter. What is its resistance?
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