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Tab Electronics Guide to Understanding Electricity ... - Sciences Club

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424 Appendix A<br />

Amount of s<strong>to</strong>red energy:<br />

CE<br />

W <br />

2<br />

2<br />

where W energy (in joules)<br />

C capacitance (in farads)<br />

E voltage across capaci<strong>to</strong>r (in volts)<br />

Conductance<br />

1 I<br />

G E R<br />

G <strong>to</strong>tal<br />

G 1<br />

G 2<br />

G 3<br />

. . . G n<br />

(resis<strong>to</strong>rs in parallel)<br />

Cosine<br />

Cotangent<br />

A<br />

cos <br />

H sin (90)<br />

1/sec <br />

A<br />

cot <br />

tan (90)<br />

0<br />

1<br />

tan <br />

Decibel<br />

P<br />

dB 10 log <br />

1<br />

(POWER)<br />

P2<br />

20 log<br />

E 1<br />

<br />

E2<br />

(VOLTAGE)

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