Te Mārama ki te Mana Hiko
Ko te mana, e ai ki te wāhanga mahi me te pūngao, e whakamāramahia ana ko te mahi e mahia ana i roto i tētahi wā motuhake. Ko te mahi te tukanga hurihanga pūngao, nō reira ka taea te mārama ko te mana te huringa o te pūngao i roto i tētahi wā motuhake.
Ko te mana hiko te huringa o te pūngao hiko i roto i tētahi wā motuhake. E whakamārama ana te kōrero mō te pūmanawa hiko ka puta ngā huringa o te pūngao pūmanawa hiko ina haere te utu hiko mā roto i tētahi rerekētanga pūmanawa hiko.
Tātai
I roto i te pāngarau, ko te huringa o te pūngao pūmanawa hiko (ΔEP) he rite ki te utu (Q) me te ngaohiko hiko (V), e whakaatuhia ana mā te whārite ΔEP = Q V. Ko te mana te huringa o te pūngao pūmanawa hiko i roto i tētahi wā, e whakaatuhia ana mā te pāngarau mā te whārite 1 :
Ko te utu hiko e rere ana i roto i tētahi wā kua whakaritea he iahiko hiko , e whakaatuhia ana i roto i te whārite I = Q/t. Ka taea te huri i te whārite 1 ki te whārite 2 :
I runga i ēnei whārite e rua, ka taea te whakatau ko ngā panonitanga o te pūngao hiko i roto i tētahi wā motuhake ka puta ina haere te iahiko hiko i roto i tētahi rerekētanga pūmanawa hiko. He rite te mana ki te iahiko hiko me te pūmanawa hiko, nō reira, ki te piki ake te iahiko hiko me/ranei te pūmanawa hiko, ka piki ake anō hoki te mana.
Ki te rere te iahiko hiko mā roto i tētahi ātete, ka tatauhia te mana mā te whakamahi i te whārite 3 , te whārite 4 rānei.
Wāhanga
I runga i te whārite 1 , ko te waeine pūngao o te Pūnaha Ao ko te Joule, ā, ko te waeine wā o te Pūnaha Ao ko te hekona, nō reira ko te waeine mana ko te Joule/hekona, e whakarapopototia ana ko J/s. Ko te Joule/hekona e kiia ana hoki ko te Watt. 1 Watt = 1 Joule/hekona.
I runga i te whārite 2 , ko te ine o te pūmanawa hiko ko Volt, ā, ko te ine o te iahiko hiko ko Ampere, nō reira ko te ine o te mana hiko ko Volt Ampere, e whakarapopototia ana ko VA.
