Te ture a Ohm – ngā raruraru me ngā otinga

Te ture a Ohm – ngā raruraru me ngā otinga

1.

I runga i te ripanga i raro nei, ko te whanaungatanga i waenga i te ngaohiko (V), te iahiko (I) me te ātete (R) ko…..

Rongoā:

Te ture a Ohm:

V = IR, R = V / I rānei

R1 = V / _I = 1.50 / 0.08 = 18.75 Ōhm

R2 = V / _I = 2.80 / 1.50 = 2.87 Ōhm

R3 = V / _I = 3.99 / 2.10 = 1.9 Ōhm

E ai ki te ripanga, ko te whanaungatanga i waenga i a V, I me R ko te uara o R he rite whakahuri ki a V me I. Ko te tikanga ka nui ake te V me I, ka iti ake te R.

Kāore te uara o V/I i te pumau, nō reira kāore e whakaatu i te ture a Ohm . E ai ki te ture a Ohm, me pumau te uara o V/I.

2. Ko tēhea kauwhata e whakaatu ana i te whanaungatanga i waenga i te rerekētanga pūmanawa me te iahiko hiko?

Rongoā:

A

3. I runga i ngā raraunga kei roto i te ripanga e whai ake nei o ngā hua whakamātautau, ka taea te whakatau ko te iahiko hiko …

Rongoā:

E ai ki ngā raraunga o te ripanga, ka nui ake te ngaohiko hiko, ka nui ake te iahiko. Nō reira, ko te whakatau he rite te iahiko ki te ngaohiko.

4. He 150 Ōhm te ātete o tētahi taputapu, ā, ka pā te iahiko hiko 2A. Ko te rerekētanga pūmanawa ko…

Mōhiotia:

Ātete (R) = 150 Ōhm

Ko te iahiko hiko (I) = 2 Ampere

E hiahiatia ana: Ngaohiko (V)

Rongoā:

V = IR

V = ngaohiko hiko, I = iahiko hiko, R = ātete hiko

Huringa:

V = IR = (2 Ampere)(150 Ohm) = 300 Volts

5. Ko te iahiko i roto i te waea ātete he 4 A. Ina hoatu he pūmanawa ki ngā pito e rua he 12 Volts. He aha te ātete hiko?

Mōhiotia:

Iahiko hiko (I) = 4 Ampere

Ngaohiko (V) = 12 Ngaohiko

E hiahiatia ana: Ātete hiko (R)

Rongoā:

Ātete:

R = V / I = 12 Volts / 4 Amps = 3 Ohms

1. He aha te Ture o Ohm?
   • WhakautuE ai ki te Ture a Ohm ko te au ($I$) e rere ana i roto i tētahi kaiārahi i waenganui i ngā pūwāhi e rua he rite tonu ki te ngaohiko ($V$) puta noa i ngā pūwāhi e rua, ā, he rite whakamuri ki te ātete ($R$) o te kaiārahi. Mā te pāngarau, e whakaaturia ana ko $V=IR$.
2. Mena ka whai te ātete i te Ture a Ohm, he aha te momo whanaungatanga me mātakitaki tātou i waenga i te ngaohiko me te iahiko?
   • WhakautuMe kite tātou i tētahi whanaungatanga rārangi. Ki te tātaihia te ngaohiko ki te iahiko, ko te pikinga o te rārangi e tohu ana i te ātete, ā, ka tika te rārangi mā te pūtake.
3. He aha te pānga o te whakanui ake i te ātete i roto i tētahi ara iahiko ki te iahiko, ki te mea ka noho pūmau te ngaohiko?
   • WhakautuKi te piki te ātete i te mea e mau tonu ana te ngaohiko, ka heke te iahiko i roto i te ara iahiko, e ai ki te Ture a Ohm.
4. He aha te take e kore ai e pā te Ture a Ohm i raro i ētahi tikanga, i ētahi rauemi rānei?
   • WhakautuE pā ana te Ture a Ohm ki ngā rauemi "ohmic" kei reira te ātete e mau tonu ana ahakoa te huringa o te ngaohiko. Heoi, mō ētahi rauemi me ngā taputapu (pēnei i ngā diode, i ngā auau tino teitei, i ngā pāmahana rānei), ka rerekē pea te ātete me te ngaohiko, te iahiko rānei, ka kore ai te whanaungatanga e rārangi.
5. He aha te waeine o te ātete, ā, me pēhea tōna whakamāramatanga i runga i te Ture a Ohm?
   • WhakautuKo te waeine o te ātete ko te ohm (Ω). Ko te ohm te ātete e āhei ai te rere o te iahiko kotahi ampere ina tukuna he iahiko kotahi ki runga.
6. Mena ka tino tutuki ngā ātete e rua e raupapa ana i te ture a Ōma, ka tutuki anō hoki te ture a te huinga?
   • WhakautuĀe, ka whai hoki te huinga i te Ture a Ohm. Ko te ātete katoa i roto i te raupapa ko te tapeke o ngā ātete takitahi, ā, ka ōrite te iahiko e puta ana i ngā mea e rua. Ko te ngaohiko puta noa i te huinga ko te tapeke o ngā ngaohiko puta noa i ia ātete.
7. He aha te pānga o te ātete o te waea ki tōna roa me tōna horahanga whakawhiti?
   • WhakautuHe rite tonu te ātete o te waea ki tōna roa, ā, he rite whakamuri ki tōna horahanga whakawhiti. Nō reira, ka nui ake te ātete o te waea roa, ā, ka iti ake te ātete o te waea matotoru.
8. Ki te takiruahia te ngaohiko puta noa i tētahi ātete, ka pēhea te rerekētanga o te iahiko, ki te mea ka noho tonu te ātete ki te ohmic?
   • WhakautuKi te noho tonu te ātete ki te ohmic (ā, ka whai i te Ture a Ohm), mā te whakarea i te ngaohiko ka whakarea anō hoki te iahiko.
9. Ka taea te whakatinana i tētahi wāhanga kāore he ātete i roto i te mahi?
   • WhakautuI ngā āhuatanga o ia rā, kāore e taea te hanga ngāwari i tētahi wāhanga kāore he ātete, he "kaiwhakahaere hiko nui" rānei. Heoi, ka taea e ētahi rauemi i ngā pāmahana tino iti te noho hei kaiwhakahaere hiko nui, ā, kāore e tuku ātete ki te rere o te iahiko.
10. He aha te kaha o te tohatoha o te ātete i runga i te ture a Ohm?

• Whakautu: Te mana ($P$) i whakamararatia e te ātete ka hoatu e P=I²R or P=V²/R, i ahu mai i te huinga o te Ture a Ohm me te tātai mana $P=IV$.