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

How much current flows if 2.4 C of charge passes a point in 0.8 s?

  1. 1.92 A
  2. 3 A
  3. 0.33 A
  4. 6 A

Answer

B. 3 A

Solution

I=Q/t=2.4/0.8=3 A.

More Voltage, Current and Resistance questions

  1. A charge of 45 C flows past a point in 15 s. Find the current.
  2. A copper wire 50 m long has a resistance of 0.43, ( =1.72×10-8, · m). Find its diameter.
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  4. A wire of resistance 4, is drawn out uniformly to twice its original length (its volume stays the same). What is its new resistance?
  5. A 12 V battery is rated 60 Ah. For how many hours can it supply a steady 5 A?
  6. A resistor has color bands yellow, violet, brown, gold. What is its resistance?
  7. 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).
  8. 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?
  9. Find the resistance of a copper wire 100 m long with a cross-sectional area of 2 mm2 (resistivity of copper =1.72×10-8, · m).
  10. Approximately how many electrons pass a point each second when the current is 2 A?

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