Page 16 - UJI COBA E-MODUL LISTRIK STATIS
P. 16
Penyelesaian:
−6
Dik: = 15 = 15 × 10
−6
= 40 = 40 × 10
−6
= 2 = 2 × 10
−2
= 3 cm = 3 × 10
Dit: …?
Jawab:
=
2
9
2
−6
2
−6
(9 × 10 / )(15 × 10 )(2 × 10 )
=
(3 × 10 ) 2
−2
9
2
2
2
(9 × 10 / )(30 × 10 −12 )
=
−4
9 × 10 2
=
=
2
9
2
−6
2
−6
(9 × 10 / )(40 × 10 )(2 × 10 )
=
−2
(3 × 10 ) 2
2
9
2
2
(9 × 10 / )(80 × 10 −12 )
=
−4
9 × 10 2
=
2
2
= √ + + 2 cos
2
= √(300 ) + (800 ) + 2(300 )(800 ) cos 120
2
0
1
2
= ට9 × 10 + 64 × 10 + 2(24 × 10 ) (− )
4
2
2
4
4
2
2
= √49 × 10
4
2
= 7 × 10
Jadi, gaya Coulomb total pada titik C sebesar × .
9
