Engineering Board Exam Reviewer · Voltage, Current and Resistance · easy
If 24 J of work moves 4 C of charge between two points, what is the voltage between them?
- 96 V
- 0.17 V
- 20 V
- 6 V
Answer
D. 6 V
Solution
V=W/Q= 24 J4 C=6 V.
More Voltage, Current and Resistance questions
- How much charge flows in 2 minutes if the current is 0.5 A?
- How much current flows if 2.4 C of charge passes a point in 0.8 s?
- A charge of 45 C flows past a point in 15 s. Find the current.
- A copper wire 50 m long has a resistance of 0.43, ( =1.72×10-8, · m). Find its diameter.
- A copper wire has a resistance of R at 20° C. At what temperature will its resistance be doubled? (Use =0.00393/° C at 20° C.)
- A wire of resistance 4, is drawn out uniformly to twice its original length (its volume stays the same). What is its new resistance?
- A 12 V battery is rated 60 Ah. For how many hours can it supply a steady 5 A?
- A resistor has color bands yellow, violet, brown, gold. What is its resistance?
- 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).
- 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?