Voltage and current
Answers are for parents and teachers.
1
50 C passes through a circuit at 12 V. How much work was done (J)?
600
2
How many volts are 350 mV and 2.5 kV?
0.35 V and 2500 V.
3
What is the current (A) if 240 C passes through the cross-section in 2 min?
2
4
How many electrons pass through the cross-section per second at a current of 1 µA?
N = 10⁻⁶ : 1.6·10⁻¹⁹ ≈ 6.25·10¹².
5
Is the word “force” in “current strength” related to mechanical force? Explain.
No: current is the charge passing in unit time, a scalar; its unit is the ampere, not the newton.