A Resistor,an Uncharged Capacitor,a Dc Voltage Source,and an Open Switch

question 208

Multiple Choice

A resistor,an uncharged capacitor,a dc voltage source,and an open switch are all connected in series.The switch is closed at time t = 0 s.Which one of the following is a correct statement about this circuit?

• A)The charge on the capacitor after four time constants is about 98% of the maximum value.
• B)The charge on the capacitor after one time constant is 50% of its maximum value.
• C)The charge on the capacitor after one time constant is 1/e of its maximum value.
• D)The voltage on the capacitor after one time constant is 1/e of the maximum value.
• E)The voltage on this capacitor after one time constant is 100% of its maximum value.

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Definitions:

Unfavorable Variance

A situation where actual costs exceed budgeted or expected costs.

Efficiency Variance

The difference between the actual input used in production and the standard input that was expected to be used.

Spending Variance

The difference between the actual amount spent and the budgeted amount for a category or period, indicating over or underspending.

Quantity Variance

The difference between the actual quantity of materials or labor used in production and the expected (or standard) quantity.