1. Hoʻolalelale ʻia kahi uila mai ka hoʻomaha ʻana ma o kahi ʻokoʻa hiki o 12 V. He aha ka loli o ka ikehu hiki uila o ka uila?
ʻIke ʻia:
ʻO ka uku ma luna o kahi electron (e) = -1.60 x 10 -19 Coulomb
Ka hiki ke uila = voltage (V) = 12 Volts
Makemake ʻia: ʻO ka loli o ka ikehu hiki ke uila o ka electron (ΔPE)
Lōlā:
ΔPE = q V = (-1.60 x 10 -19 C)(12 V) = -19.2 x 10 -19 Joules
Hōʻike ka hōʻailona minus e emi ana ka ikehu hiki.
ʻAʻole maopopo
2. Ua hoʻouka ʻia ʻelua mau papa like. ʻO ka mamao ma waena o nā papa he 2 cm a ʻo ka nui o ke kahua uila ma waena o nā papa he 500 Volt/mika. He aha ka loli o ka ikehu hiki o ka proton i ka wā e hoʻolalelale ʻia ai mai ka papa i hoʻopiʻi maikaʻi ʻia i ka papa i hoʻopiʻi maikaʻi ʻole ʻia.
ʻIke ʻia:
ʻO ka nui o ke kahua uila ma waena o nā papa (E) = 500 Volt/mika
ʻO ka mamao ma waena o nā papa (s) = 2 kenimika = 0,02 m
ʻO ke kumukūʻai ma luna o ka proton = +1.60 x 10 -19 Coulombs
Makemake ʻia: ʻO ka loli o ka ikehu hiki ke uila (ΔPE)
Lōlā:
Ka hiki ke uila:
V = E s
V = (500 Volt/m)(0.02 m)
V = 10 Volt
Ka loli o ka ikehu hiki ke uila:
ΔPE = q V
ΔPE = (1,60 x 10 -19 C)(10 V)
ΔPE = 16 x 10 -19 Joule
ΔPE = 1.6 x 10 -1 8 Joule
ʻAʻole maopopo
3. Ua hoʻokaʻawale ʻia nā uku kiko ʻelua e kahi mamao o 10 cm. ʻO ka uku ma ke kiko A = +9 μC a ʻo ka uku ma ke kiko B = -4 μC. k = 9 x 10 9 Nm 2 C −2 , 1 μC = 10 −6 C. He aha ka loli o ka ikehu hiki ke uila o ka uku ma ke kiko B inā e hoʻolalelale ʻia i ke kiko A?
ʻIke ʻia:
Hoʻouka A (q 1 ) = +9 μC = +9 x 10 −6 C
Hoʻouka B (q 1 ) = -4 μC = -4 x 10 −6 C
k = 9 x 10 9 Nm 2 C −2
ʻO ka mamao ma waena o nā uku A a me B (r) = 10 kenimika = 0.1 m = 10 -1 m
Makemake ʻia: ʻO ka loli o ka ikehu hiki ke uila (ΔEP)
Lōlā:
