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:

Sporadic Reliability

A term indicating an unpredictable level of reliability, where the performance or function of a system or component is irregular and not consistently dependable.

Hardwired Relay Schematic

A diagram that represents the physical wiring and logic connections of relays within a control system.

Ladder Logic

A graphical programming language used in programmable logic controllers (PLCs) that emulates electrical relay logic circuits.