Question 1
In solving a complex circuit, a negative value of current indicates that a calculation error was made.
Question 2
Norton's theorem is used for simplifying a network in terms of currents instead of voltages.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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