Foromo ea Leqhubu le Fetohileng Leqhubu le Lelelele le sa Feleng

Mehlala ea lipotso le mekhoa ea maqhubu a potolohang, maqhubu a longitudinal, maqhubu a sa sisinyeheng

Maqhubu a potolohang

1. Sebaka se pakeng tsa liforo tse peli tse haufi tsa leqhubu la metsi ke limithara tse 20. Ntho e phaphamala holim'a metsi 'me e utloa motsamao oa ho thothomela. Haeba nako ea ho thothomela hanngoe e le metsotsoana e 4, joale lebelo la leqhubu ke…. m/s

1. 20
2. 15
3. 10
4. 5

Puisano
Hoa tsebahala hore:
Bolelele ba maqhubu (λ) = limithara tse 20
Nako (T) = metsotsoana e 4
O botsitse: Lebelo la maqhubu (v)
Karabo:
Foromo ea lebelo la maqhubu:
v = λ / T = limithara tse 20 / metsotsoana e 4 = limithara tse 5 / motsotsoana
Karabo e nepahetseng ke D.

2. Dintlha tse pedi A le B di hodima thapo mme di arohane ka 90 cm. Thapong, maqhubu a tšelang, kahoo ntlha eo A e sehlohlolong sa leqhubu, ntlha ya B e sehlohlolong sa leqhubu, mme pakeng tsa tse pedi ho na le dihlohlolo tse pedi le ditlase tse pedi tsa leqhubu. Haeba nako ya leqhubu e le metsotswana e 0,3, jwale lebelo la ho ata ha maqhubu Ke….

1. 10,8cm/s
2. 18,0cm/s
3. 120,0cm/s
4. 200,0cm/s

Puisano
Hoa tsebahala hore:
Sebaka AB (l) = 90 cm
Nako ea maqhubu (T) = metsotsoana e 0,3
Maqhubu a maqhubu (f) = 1/0,3 metsotsoana
Ntlha ea A e sehlohlolong sa leqhubu, ntlha ea B e botlaaseng ba leqhubu
Pakeng tsa lintlha tsa A le B ho na le litlhōrō tse peli le botlaaseng bo habeli ba leqhubu
O botsitse: Lebelo la ho ata ha maqhubu (v = f λ)
Karabo:
Ho latela setšoantšo, ho fihletsoe qeto ea hore ho na le maqhubu a 2,5. Sebaka sa maqhubu a le leng (λ) = 90 cm / 2,5 = 36 cm

Lebelo la ho ata ha maqhubu:
v = f λ = (1/0,3) (36) = 36/0,3 = 120 cm/s.
Karabo e nepahetseng ke C.

3. Kerafo e latelang e bonts'a ho falla ha ntlha ka har'a seaplane e le ts'ebetso ea nako ha leqhubu le feta ka har'a seaplane.
Haeba bolelele ba leqhubu bo le limithara tse 6, joale lebelo la ho ata ha leqhubu ke...

1. 3 limithara / s
2. 6 limithara / s
3. 8 limithara / s
4. 12 limithara / s

Puisano
Hoa tsebahala hore:
Ho na le maqhubu a 2 a maqhubu a ipapisitseng le kerafo e kaholimo.
Sebaka sa bolelele ba leqhubu le le leng (λ) = limithara tse 6 / 2 = limithara tse 3.
Nako (T) = metsotsoana e 0,5
O botsitse: Lebelo la maqhubu (v)
Karabo:
v = f λ = λ / T = limithara tse 3 / metsotsoana e 0,5 = limithara tse 6 / motsotsoana
Karabo e nepahetseng ke B.

Maqhubu a bolelele

4. Mehloli e 'meli ea molumo e lla ka nako e le 'ngoe ka mokhoa o tšoanang oa molumo le mocheso. Mohloli oa pele oa molumo o na le maqhubu a 640 Hz 'me mohloli oa bobeli oa molumo ke 1280 Hz. Polelo e nepahetseng ke….

1. Lebelo la molumo oa pele le leholo ho feta lebelo la molumo oa bobeli
2. Lebelo la molumo oa pele le lenyenyane ho feta lebelo la molumo oa bobeli
3. Lebelo la pele le la bobeli la molumo lea tšoana
4. Nako e telele maqhubu a molumo ka bobeli li lekana ka boholo

Puisano
Lebelo la modumo le itshetlehile ka modumo o mahareng, kahoo haeba modumo o mahareng o tshwana, lebelo la medumo ka bobedi le tla tshwana. Ka lehlakoreng le leng, haeba maqhubu a le hodimo, bolelele ba leqhubu bo tla ba bo bonyenyane, mme ka ho tshwanang, haeba maqhubu a le tlase, bolelele ba leqhubu bo tla ba boholo. Maqhubu a medumo e mmedi a fapane, kahoo maqhubu a medumo e mmedi le ona a tla fapana.
Karabo e nepahetseng ke C.

Maqhubu a sa emeng (maqhubu a emeng)

5. Thapo e nang le mahlakore ka bobedi a tlamilweng e hlahisa modumo wa motheo o nang le maqhubu a 420 Hz. Maqhubu a medumo e meraro e fetang ena ke….

1. 840 Hz
2. 1260 Hz
3. 1680 Hz
4. 2940 Hz

Puisano
Hoa tsebahala hore:
Maqhubu a motheo (f)₁) = 420 Hz
Lipheletso ka bobeli tsa terata li tlamiloe
O botsitse: Makgetlo a melumo e meraro e fetang e tloaelehileng
Karabo:
Maqhubu a molumo oa bobeli o fetang (f)₂) = 2 f₁ = 2 (420 Hz) = 840 Hz
Makgetlo a modumo o fetang wa boraro (f)₃) = 3 f₁ = 3 (420 Hz) = 1260 Hz
Karabo e nepahetseng ke B.

Maqhubu a molumo

6. Setšoantšo se ka tlase se bontša tšepe ea motlakase ka har'a sekwahelo se koetsoeng. Ebe tšepe ea letsoa, ​​​​e lokolla moea ho tsoa sekwahelong. Kamora hore moea o lokolloe sekwahelong, molumo oa tšepe ha o sa utloahala. Ho latela ketsahalo ena, ho ka fihleloa qeto ea hore molumo...

1. ha e etsahale sebakeng se koetsoeng
2. e tsamaisoang ke moea o tsoang ka har'a sekoahelo
3. e ke ke ea ata ka har'a vacuum
4. e ke ke ea ata ka lintho tse tiileng

Puisano
Molumo ke leqhubu le tsamayang hara dintho tse tiileng, metsi le dikhase. Haeba tshepe e le ka hara vacuum, maqhubu a modumo a ke ke a tsamaya ho tloha tshepeng ho ya tsebeng ya momamedi.
Karabo e nepahetseng ke C.

Mohloli oa lipotso:

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