An Electron Is Released from Rest at the Negative Plate

question 1

Multiple Choice

An electron is released from rest at the negative plate of a parallel-plate capacitor. If the distance across the plates is 5.0 mm and the potential difference across the plates is 20 V, with what velocity does the electron hit the positive plate? (m_e = 9.1 * 10 ^{- 31} kg, e = 1.6 *10 ^{- 19} C)

• A) 1.3 * 10⁶ m/s
• B) 1.0 * 10⁶ m/s
• C) 2.7 *10⁶ m/s
• D) 5.3 * 10⁶ m/s

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Definitions:

Long-Run Equilibrium

A state in which all factors of production and costs are variable, and firms make no economic profit or loss.

Long-Run Average Cost Curve

A graphical representation showing the minimum average cost of producing any given level of output when all inputs, including capital, are variable.

Short-Run Average Cost Curve

A graphical representation that shows how the average cost of production changes with varying output levels in the short term.

Economies of Scale

Cost advantages that enterprises obtain due to their scale of operation, leading to a decreased cost per unit.