Page 637 - index

Ʉԧɥɛɟɭ ɠɚɩɫɚɪԑɚ Ɇ ɦɨɦɟɧɬɿ ԥɫɟɪ ɟɬɤɟɧɞɟɝɿ (17 Ω-ɫɭɪɟɬ) ɛɟɪɿɤɬɿɤ ɲɚɪɬɵ:

W M M d >W c@. (6-ɚ)
W
1 ˜ 0,7k b 2
6

Ⱥɪɚɥɚɫ ɛɿɪɿɤɬɿɪɭɥɟɪɞɿԙ, ɹԑɧɢ ɤԛɲɬɟɪ ɛɚԑɵɬɵɧɚ ɩɚɪɚɥɥɟɥɶ ɠԥɧɟ
ɩɟɪɩɟɧɞɢɤɭɥɹɪ ɠɚɩɫɚɪɥɚɪ ɚɪԕɵɥɵ ɛɿɪɿɤɬɿɪɭɥɟɪɞɿԙ ɛɟɪɿɤɬɿɤɬɟɪɿ. ɋɨɧɵԙ
ɿɲɿɧɞɟ:
– ɠɚɩɫɚɪԑɚ ɬɟɤ Ɋ ɤԛɲɿ ԥɫɟɪ ɟɬɤɟɧɞɟɝɿ (18 ɚ-ɫɭɪɟɬ) ɛɟɪɿɤɬɿɤ ɲɚɪɬɵ

WɊ Ɋ lɬ ) d >W c@. (7)
0,7k (lɮ

18-ɫɭɪɟɬ

Ɏɨɪɦɭɥɚɞɚԑɵ: lɬ – ɬɿɤ (ɤԛɲɤɟ ɩɟɪɩɟɧɞɢɤɭɥɹɪ) ɠɚɩɫɚɪɞɵԙ ԝɡɵɧɞɵԑɵ, lɮ –

ɮɥɚɧɝɚɥɵ (ɤԛɲɤɟ ɩɚɪɚɥɥɟɥɶ) ɠɚɩɫɚɪɞɵԙ ԝɡɵɧɞɵԑɵ.
- ɠɚɩɫɚɪԑɚ Ɋ ɤԛɲɿ ɠԥɧɟ Ɇ ɦɨɦɟɧɬɿ ԥɫɟɪ ɟɬɤɟɧɞɟɝɿ (18 Ω-ɫɭɪɟɬ) ɛɟɪɿɤɬɿɤ
ɲɚɪɬɵɧ ɚɥɭ ԛɲɿɧ, ԥɪ ɤԛɲɬɟɧ ɤɟɪɧɟɭɥɟɪɞɿ ɠɟɤɟ-ɠɟɤɟ ɬɚɭɵɩ ɚɥɚɦɵɡ. Ɋ ɤԛɲɿ
ԥɫɟɪ ɟɬɤɟɧɞɟɝɿ ɤɟɪɧɟɭ 7-ɮɨɪɦɭɥɚɦɟɧ ɚɧɵԕɬɚɥɚɞɵ. Ⱥɥ Ɇ ɦɨɦɟɧɬɿ ԥɫɟɪ
ɟɬɤɟɧɞɟɝɿ ɤɟɪɧɟɭɞɿԙ ɮɨɪɦɭɥɚɫɵ:

WɆ M .

0,7k lɮ l ɬ 1 ˜ 0,7k lɬ2
6

Ⱦɟɦɟɤ, ɛɟɪɿɤɬɿɤ ɲɚɪɬɵ: W W Ɋ W Ɇ d >W c@.

(7-ɚ)

3.3. Ʉɨɧɬɚɤɬɿɥɿ ɩɿɫɿɪɭ ɚɪΙɵɥɵ ɛɿɪɿɤɬɿɪɭ. ɇԛɤɬɟɥɿ ɩɿɫɿɪɭ ɤɟɡɿɧɞɟ,
ɠɚɩɫɚɪɥɚɪ ɬɨɥɵԑɵɦɟɧ ɩɿɫɿɪɿɥɦɟɣɞɿ, ɬɟɤ ɨɥɚɪɞɵԙ ɠɟɤɟɥɟɧɝɟɧ ɧԛɤɬɟɥɟɪɿ
ɩɿɫɿɪɿɥɟɞɿ. Ɇԝɧɞɚɣ ɩɿɫɿɪɭ, ɧɟɝɿɡɿɧɟɧ, ɠԝԕɚ ɬɟɦɿɪ ɬɚɛɚԕɬɚɪɞɚɧ ɬԝɪɚɬɵɧ
ɛԧɥɲɟɤɬɟɪɞɿ ɛɿɪɿɤɬɿɪɭ ԛɲɿɧ ԕɨɥɞɚɧɵɥɚɞɵ (19-ɫɭɪɟɬ).

ɉɿɫɿɪɭ ɧԛɤɬɟɥɟɪɿɧɿԙ ɞɢɚɦɟɬɪɿ ɟԙ ɠԝԕɚ ɬɚɛɚԕɬɵԙ ԕɚɥɵԙɞɵԑɵɧɚ ɛɚɣɥɚɧɵɫɬɵ
ԕɚɛɵɥɞɚɧɚɞɵ, ɦɵɫɚɥɵ:
s d 3ɦɦ Ÿ d 1,2s 4ɦɦ;

s 3ɦɦ Ÿ d 1,5s 5ɦɦ.

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