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Listrik Statis

Kode : LS1/NO.1/SM1/2013 Nama :..

Tanggal ditugaskan : 03 JULI 2013. Kelas :...

Tanggal diserahkan : 06 JULI 2013.

Jawablah setiap pertanyaan berikut ini dengan jelas.

1. Tuliskan Model Atom yang dikemukakan oleh Rutherford.

.

2. Perhatikan gambar model atom berikut ini. Tunjukkan pada gambar elektron, proton, inti atom dan

kulit atom dengan menggunakan panah ( garis berarah )

3. Perhatikan gambar model atom Karbon berikut ini.

Tentukanlah jumlah partikel proton, elektron dan neutron yang terdapat pada atom.

Proton =.

Elektron =.

Neutron =.

4. Gambarlah model atom pada tempat yang disediakan dibawahin untuk:

a. Natrium ( Na = 11)

b. Ion Na+

c. Chlor ( Cl = 17 )

d. Helium ( He = 2)

ElektronProton

Kulit Atom

Inti atom

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5. Jika batang kaca digosok dengan kain sutera, jelaskan perpindahan muatan yang terjadi.

.

..

6. Jika batang plastik digosok dengan kain wol, jelaskan perpindahan muatan yang terjadi.

.

.

.

7. a. Benda bermuatan positif jika lebih banyak dari

atau benda mengalami kelebihan muatan

b. Benda bermuatan negatif jika lebih banyak dari

atau benda mengalami kelebihan muatan

c. Benda Netral..

8. Tuliskan 3 ( tiga ) cara memberi muatan pada benda Netral.

(i)

(ii)

(iii)

9. Menurut hukum Coulomb, gaya interaksi antara 2 muatan :

Na = 11 Ion Na+

Chlor ( Cl = 17 ) Helium ( He = 2)

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(i)..besar masing masing muatan

(ii)..jarak pisah antara kedua muatan

Rumus : F =

10. Perhatikan gambar 2 muatan berikut ini, hitunglah gaya F2.

11. Dua muatan masing masing 20 C dan 45 C terpisah pada jarak 2 meter. Jika k = 9 x 109 N.m/C2,hitunglah besar gaya interaksi antara kedua muatan tersebut.

12. Dua muatan Q1= 15 mC dan Q2 mengalami gaya interaksi sebesar 16 N jika terpisah pada jarak 10

meter. Jika k = 9 x 109 N.m/C2, hitunglah besar Q2.

13. Dua muatan masing masing 4Q dan 5Q terpisah sejauh x mengalami gaya tolak- menolak 12 N.

Jika jarak kedua muatan dibuat menjadi 2x dan besar masing masing muatan menjadi dua kali

semula, berapa gaya interaksi sekarang ?

Jawaban :

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F2 =

rF1= 4 N

F1= 4 N

F2 = 2r

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Guru Mata Pelajaran

Johansen,S.Pd