Final answer:
Receiving $250 from a customer a)increases working capital by raising current assets. Factors such as lower interest rates can increase the quantity of loans. If voltage across a fixed resistance is doubled, current also doubles.
Step-by-step explanation:
When a company receives $250 from a customer, it increases the company's cash balance, which is a current asset. Because working capital is calculated as current assets minus current liabilities, an increase in current assets leads to an increase in working capital, assuming liabilities remain constant. Therefore, the effect of receiving $250 from a customer on working capital is that it increases.
Regarding the second question about changes in the financial market that would lead to an increase in the quantity of loans made and received, factors such as lower interest rates or reduced lending standards can encourage borrowing and lending.
Lastly, in physics, if the voltage across a fixed resistance is doubled, according to Ohm's Law (V = IR), the current (I) also doubles, because voltage (V) is directly proportional to current (I) when resistance (R) is constant.