# Kuliah 4: Potensial listrik " The world little knows how many of the thoughts and theories which have passed through the mind of the scientific investigator.

## Presentation on theme: "Kuliah 4: Potensial listrik " The world little knows how many of the thoughts and theories which have passed through the mind of the scientific investigator."— Presentation transcript:

Kuliah 4: Potensial listrik " The world little knows how many of the thoughts and theories which have passed through the mind of the scientific investigator have been crushed in silence and secrecy by his own severe criticism and adverse examination; that in the most successful instances not a tenth of the suggestions, the hopes, the wishes, the preliminary conclusions have been realized." --Michael Faraday Michael Faraday (1791-1867)

Physics 102 Section 202 Copyright by Dr. Marina Milner-Bolotin 2 Potensial listrik: Gaya ElektrostatikaGaya Gravitasi Medan dan energi Medan listrik seragam Medan listrik seragam :PE=qEd Medan listrik seragam : PE = mgh Energi potensial: muatan titik Energi potensial: massa titik Potensial: Muatan titik Potensial: Massa titik

Physics 102 Section 202 Copyright by Dr. Marina Milner-Bolotin 3

4 1. U a = U b > U c = U d 2. U a = U c > U b = U d 3. U b = U d > U a = U c 4. U d > U b = U c > U a 5. U d > U c > U b > U a Energi potensial listrik

Physics 102 Section 202 Copyright by Dr. Marina Milner-Bolotin 5 Potensial listrik

Physics 102 Section 202 Copyright by Dr. Marina Milner-Bolotin 6 Grafik V

Physics 102 Section 202 Copyright by Dr. Marina Milner-Bolotin 7 Permukaan ekuipotensial

Physics 102 Section 202 Copyright by Dr. Marina Milner-Bolotin 8 Permukaan ekuipotensial Two positive charges repelling each other (weak field in between) Two unlike charges attracting each other (strong field in between and weak field outside)

Physics 102 Section 202 Copyright by Dr. Marina Milner-Bolotin 9 Urutkan potensial terbesar -- terkecil 1. ∆V 12 > ∆V 13 = ∆V 23 2. ∆V 13 > ∆V 12 > ∆V 23 3. ∆V 13 > ∆V 23 > ∆V 12 4. ∆V 13 = ∆V 23 > ∆V 12 5. ∆V 23 > ∆V 12 > ∆V 13 Potensial listrik pada muatan titik

Physics 102 Section 202 Copyright by Dr. Marina Milner-Bolotin 10 Bola bermuatan: E and V E = 0 pada bola bermuatan

Physics 102 Section 202 Copyright by Dr. Marina Milner-Bolotin 11 Permukaan ekuipotensial E = 0 V = const

Physics 102 Section 202 Copyright by Dr. Marina Milner-Bolotin 12 Contoh 2: E dan V oleh muatan titik

Physics 102 Section 202 Copyright by Dr. Marina Milner-Bolotin 13 Jawab :

Physics 102 Section 202 Copyright by Dr. Marina Milner-Bolotin 14 Jawab : y x  E Q2 E Q1 E E  E Q2 E Q1

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