Imibuzo Yesibonelo Sokuqina Komsindo

Izibonelo ezi-4 zemibuzo yokuqina komsindo

1. Amaphuzu A no-B aqhelelene ngamamitha angu-4 namamitha angu-9 ukusuka emthonjeni womsindo. Uma ngi_A nami_B ngamunye wabo ukuqina komsindo endaweni A kanye nephuzu B, bese kuba mina_A : Mina_B kuyinto…

A. 3: 2

B. 4: 9

C. 9: 4

D. 16: 81

Isahluko 81: 16

Ingxoxo

Kuyaziwa ukuthi:

Ibanga lephuzu A kusuka emthonjeni womsindo (r)_A) = 4 amamitha

Ibanga lephuzu B kusukela emthonjeni womsindo (r_B) = 9 amamitha

Ukuqina komsindo endaweni A = I_A

Ukuqina komsindo endaweni B = I_B

Kubuziwe: I_A : Mina_B

Impendulo:

Ifomula yobudlelwano phakathi kokuqina kanye nebanga:

Impendulo efanele ngu-E.

2. Umsindo womshini wokuthunga uma usebenza u-10^-9 Wm^-2. Ukuze kube nomkhawulo womsindo ongu-10^-12 Wm^-2, khona-ke izinga lomsindo wemishini yokuthunga efanayo eyi-10 esebenzayo liyi…..
A. 400 dB

B. 300 dB

C. 40 dB

D. 30 dB

E. 20 dB

Ingxoxo

Kuyaziwa ukuthi:

Mina = 10^-9 W / m²

I_o = 10^-12 W / m²

x = i-10

Kubuziwe: Umshini wokuthunga we-TI 10?

Impendulo:

Imishini ye-TI 10 = umshini we-TI 1 + ilogi eli-10 x

I-TI = 30 + 10 ilogi 10

I-TI = 30 + 10 ilogi 10¹

I-TI = 30 + (1)(10)(ilogi 10)

I-TI = 30 + 10

I-TI = 40 dB

Impendulo efanele ngu-C.

3. Izinga lokuqina kwenyosi eyodwa ebhuza liyi-10 dB. Uma umsindo wokubhuza wenyosi ngayinye ubhekwa njengofanayo futhi umkhawulo wokuzwa komuntu uyi-10 dB.^-12 Wm^-2 Ngakho-ke ukuqina komsindo wokubhonga kwezinyosi eziyi-1000...

A. 10^-8 Wm^-2

B. 10^-7 Wm^-2

C. 10^-6 Wm^-2

D. 10^-5 Wm^-2

E. 10^-4 Wm^-2

Ingxoxo

Kuyaziwa ukuthi:

I-TI = 10 dB

I_o = 10^-12 W / m²

x = i-1000

Kubuziwe: Izinyosi ze-TI 1000?

Impendulo:

4. Umsindo wehuthi yesithuthuthu uma uzwakala ukhiqiza izinga lokuqina elingu-40 dB, kanti umsindo wehuthi yemoto uma uzwakala ukhiqiza izinga lokuqina elingu-60 dB (I)._o = 10^-12 Ubusuku m^-2 ). Uma kuzwakala amacilongo ezithuthuthu ayi-100 kanye namacilongo ezimoto ayi-10 ngesikhathi esisodwa, khona-ke isilinganiso sezinga lokuqina kwezithuthuthu ezimotweni singu ….

A. 5: 6

B. 6: 7

C. 7: 8

D. 8: 9

Isahluko 9: 10

Ingxoxo

Kuyaziwa ukuthi:

Izinga lokuqina (i-TI) lomsindo we-horn yesithuthuthu = 40 dB

Izinga lokuqina (i-TI) lomsindo we-horn yemoto = 60 dB

Ubukhulu obuncane abantu abangabuzwa (I_o) isilinganiso = 10^-12 Ubusuku m^-2

Umbuzo: Iyini isilinganiso se-TI samabhayisikili ayi-100 ne-TI yezimoto eziyi-10?

Impendulo:

Ukuqhathaniswa kwezithuthuthu ze-TI 100 nezimoto ze-TI 10 yilokhu:

60: 70

6: 7

Impendulo efanele ingu-B.

Umthombo wombuzo:

Imibuzo Yefiziksi Yezivivinyo Zikazwelonke Zesikole Samabanga Aphezulu/Isikole Samabanga Aphezulu Sokufundela Umsebenzi