A Capacitor Is Made with Two Strips of Metal Foil,each $\mu$

question 8

Multiple Choice

A capacitor is made with two strips of metal foil,each 2.5 cm wide by 50 cm long,with a 0.70- $\mu$ m thick strip of paper ( $\kappa$ = 3.7) sandwiched between them.The capacitor is rolled up to save space.What is the capacitance of this device? (The permittivity of free space $\varepsilon$ ₀ = 8.85 $\times$ 10^-12 F/m.)

• A)43 nF
• B)0.16 \(\mu\)F
• C)0.58 \(\mu\)F
• D)2.0 \(\mu\)F
• E)7.3 \(\mu\)F

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Definitions:

Monopolistically Competitive

A market structure in which many firms sell products that are similar but not identical, allowing for some degree of market power and product differentiation.

MC = MR

The condition where marginal cost equals marginal revenue, often used to determine the profit-maximizing level of production for a firm.

Monopolistically Competitive

A market structure where many firms sell products that are similar but not identical, allowing for some degree of market power due to differentiation.

Marginal Decision Rule

A principle stating that an action should be taken if and only if the marginal benefits outweigh the marginal costs.