Question 1. A lightning bolt carrying 10,000 amperes lasts
for 50 microseconds. If the lightning strikes a tractor, what is the charge
deposited on the tractor, if the tires are assumed to be perfect.
0.5 Coulombs
Question 2. How much energy is extracted from an electron
as it flows through a 12 V battery from the negative to the positive terminal?
1.92 aJ
Question 3. The voltage accross a circuit element is 12
exp(-2t) volts. The current entering the positive terminal of the element
is is 2 exp(-2t) amperes. The energy in the element in 1.5 seconds, staring
from t=0 is:
5.99 J absorbed
Question 4. What is the definition of the unit of electric
current, the Ampere, in SI Units.
The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 m apart in vacuum, would produce between the conductors a force equal to 2.0E-07 N per meter of length.
Question 5. What are the three fundamental assumptions
made when analyzing a system using circuit theory?
See page 5 of Nilsson.