Ohm

Ohm
Một điện trở 1 Ohm
Thông tin đơn vị
Hệ thống đơn vịSI
Đơn vị củaĐiện trở
Kí hiệuΩ 
Được đặt tên theoGeorg Simon Ohm
In SI base units:kg⋅m2⋅s−3⋅A−2

Ohm (phát âm tiếng Việt: Ôm), ký hiệu Ω, đơn vị đo điện trở R (X, Z) trong hệ SI, đặt tên theo nhà Vật lý Đức Georg Simon Ohm. Đơn vị Ohm xuất phát từ định luật Ohm.

Định nghĩa

Một Ohm là giá trị điện trở của vật khi đặt giữa hiệu điện thế 1 volt thì có dòng điện cường độ 1 ampere chạy qua.

Các ước số-bội số của ôm

Các tiền tố kết hợp với đơn vị ôm

Tiền tố Kết hợp với đơn vị ôm Giá trị Cách đọc bội sô
Y YΩ 1 × 1024 Ω Yôtaôm
Z ZΩ 1 × 1021 Ω Zêtaôm
E EΩ 1 × 1018 Ω Êxaôm
P PΩ 1 × 1015 Ω Pêtaôm
T TΩ 1 × 1012 Ω Têraôm
G GΩ 1 × 109 Ω Gigaôm
M MΩ 1 × 106 Ω Mêgaôm
k kΩ 1 × 103 Ω kilôôm
h hΩ 1 × 102 Ω héctôôm
da daΩ 1 × 101 Ω đêcaôm
Tiền tố Kết hợp với đơn vị ôm Giá trị Cách đọc ước sô
d dΩ 1 × 10−1 Ω đêxiôm
c cΩ 1 × 10−2 Ω xentiôm
m mΩ 1 × 10−3 Ω miliôm
μ μΩ 1 × 10−6 Ω micrôôm
n nΩ 1 × 10−9 Ω nanôôm
p pΩ 1 × 10−12 Ω picôôm
f fΩ 1 × 10−15 Ω femtôôm
a aΩ 1 × 10−18 Ω atôôm
z zΩ 1 × 10−21 Ω zeptôôm
y yΩ 1 × 10−24 Ω yóctôôm

Bảng chuyển đổi giá trị giữa các ước số-bội số khác nhau

Các bội số-ước số YΩ ZΩ EΩ PΩ TΩ GΩ MΩ kΩ hΩ daΩ Ω dΩ cΩ mΩ μΩ nΩ pΩ fΩ aΩ zΩ yΩ
1 YΩ 1 1 × 103 1 × 106 1 × 109 1 × 1012 1 × 1015 1 × 1018 1 × 1021 1 × 1022 1 × 1023 1 × 1024 1 × 1025 1 × 2626 1 × 1027 1 × 1030 1 × 1033 1 × 1036 1 × 1039 1 × 1042 1 × 1045 1 × 1048
1 ZΩ 1 × 10−3 1 1 × 103 1 × 106 1 × 109 1 × 1012 1 × 1015 1 × 1018 1 × 1019 1 × 1020 1 × 1021 1 × 1022 1 × 1023 1 × 2624 1 × 1027 1 × 1030 1 × 1033 1 × 1036 1 × 1039 1 × 1042 1 × 1045
1 EΩ 1 × 10−6 1 × 10−3 1 1 × 103 1 × 106 1 × 109 1 × 1012 1 × 1015 1 × 1016 1 × 1017 1 × 1018 1 × 1019 1 × 1020 1 × 1021 1 × 2624 1 × 1027 1 × 1030 1 × 1033 1 × 1036 1 × 1039 1 × 1042
1 PΩ 1 × 10−9 1 × 10−6 1 × 10−3 1 1 × 103 1 × 106 1 × 109 1 × 1012 1 × 1013 1 × 1014 1 × 1015 1 × 1016 1 × 1017 1 × 1018 1 × 1021 1 × 2624 1 × 1027 1 × 1030 1 × 1033 1 × 1036 1 × 1039
1 TΩ 1 × 10−12 1 × 10−9 1 × 10−6 1 × 10−3 1 1 × 103 1 × 106 1 × 109 1 × 1010 1 × 1011 1 × 1012 1 × 1013 1 × 1014 1 × 1015 1 × 1018 1 × 1021 1 × 2624 1 × 1027 1 × 1030 1 × 1033 1 × 1036
1 GΩ 1 × 10−15 1 × 10−12 1 × 10−9 1 × 10−6 1 × 10−3 1 1 × 103 1 × 106 1 × 107 1 × 108 1 × 109 1 × 1010 1 × 1011 1 × 1012 1 × 1015 1 × 1018 1 × 1021 1 × 2624 1 × 1027 1 × 1030 1 × 1033
1 MΩ 1 × 10−18 1 × 10−15 1 × 10−12 1 × 10−9 1 × 10−6 1 × 10−3 1 1 × 103 1 × 104 1 × 105 1 × 106 1 × 107 1 × 108 1 × 109 1 × 1012 1 × 1015 1 × 1018 1 × 1021 1 × 2624 1 × 1027 1 × 1030
1 kΩ 1 × 10−21 1 × 10−18 1 × 10−15 1 × 10−12 1 × 10−9 1 × 10−6 1 × 10−3 1 1 × 101 1 × 102 1 × 103 1 × 104 1 × 105 1 × 106 1 × 109 1 × 1012 1 × 1015 1 × 1018 1 × 1021 1 × 2624 1 × 1027
1 hΩ 1 × 10−22 1 × 10−19 1 × 10−16 1 × 10−13 1 × 10−10 1 × 10−7 1 × 10−4 1 × 10−1 1 1 × 101 1 × 102 1 × 103 1 × 104 1 × 105 1 × 108 1 × 1011 1 × 1014 1 × 1017 1 × 1020 1 × 1023 1 × 1026
1 daΩ 1 × 10−23 1 × 10−20 1 × 10−17 1 × 10−14 1 × 10−11 1 × 10−8 1 × 10−5 1 × 10−2 1 × 10−1 1 1 × 101 1 × 102 1 × 103 1 × 104 1 × 107 1 × 1010 1 × 1013 1 × 1016 1 × 1019 1 × 1022 1 × 1025
1 Ω 1 × 10−24 1 × 10−21 1 × 10−18 1 × 10−15 1 × 10−12 1 × 10−9 1 × 10−6 1 × 10−3 1 × 10−2 1 × 10−1 1 1 × 101 1 × 102 1 × 103 1 × 106 1 × 109 1 × 1012 1 × 1015 1 × 1018 1 × 1021 1 × 1024
1 dΩ 1 × 10−25 1 × 10−22 1 × 10−19 1 × 10−16 1 × 10−13 1 × 10−10 1 × 10−7 1 × 10−4 1 × 10−3 1 × 10−2 1 × 10−1 1 1 × 101 1 × 102 1 × 105 1 × 108 1 × 1011 1 × 1014 1 × 1017 1 × 1020 1 × 1023
1 cΩ 1 × 10−26 1 × 10−23 1 × 10−20 1 × 10−17 1 × 10−14 1 × 10−11 1 × 10−8 1 × 10−5 1 × 10−4 1 × 10−3 1 × 10−2 1 × 10−1 1 1 × 101 1 × 104 1 × 107 1 × 1010 1 × 1013 1 × 1016 1 × 1019 1 × 1022
1 mΩ 1 × 10−27 1 × 10−24 1 × 10−21 1 × 10−18 1 × 10−15 1 × 10−12 1 × 10−9 1 × 10−6 1 × 10−5 1 × 10−4 1 × 10−3 1 × 10−2 1 × 10−1 1 1 × 103 1 × 106 1 × 109 1 × 1012 1 × 1015 1 × 1018 1 × 1021
1 μΩ 1 × 10−30 1 × 10−27 1 × 10−23 1 × 10−21 1 × 10−18 1 × 10−15 1 × 10−12 1 × 10−9 1 × 10−8 1 × 10−7 1 × 10−6 1 × 10−5 1 × 10−4 1 × 10−3 1 1 × 103 1 × 106 1 × 109 1 × 1012 1 × 1015 1 × 1018
1 nΩ 1 × 10−33 1 × 10−30 1 × 10−27 1 × 10−24 1 × 10−21 1 × 10−18 1 × 10−15 1 × 10−12 1 × 10−11 1 × 10−10 1 × 10−9 1 × 10−8 1 × 10−7 1 × 10−6 1 × 10−3 1 1 × 103 1 × 106 1 × 109 1 × 1012 1 × 1015
1 pΩ 1 × 10−36 1 × 10−33 1 × 10−30 1 × 10−27 1 × 10−24 1 × 10−21 1 × 10−18 1 × 10−15 1 × 10−14 1 × 10−13 1 × 10−12 1 × 10−11 1 × 10−10 1 × 10−9 1 × 10−6 1 × 10−3 1 1 × 103 1 × 106 1 × 109 1 × 1012
1 fΩ 1 × 10−39 1 × 10−36 1 × 10−33 1 × 10−30 1 × 10−27 1 × 10−24 1 × 10−21 1 × 10−18 1 × 10−17 1 × 10−16 1 × 10−15 1 × 10−14 1 × 10−13 1 × 10−12 1 × 10−9 1 × 10−6 1 × 10−3 1 1 × 103 1 × 106 1 × 109
1 aΩ 1 × 10−42 1 × 10−39 1 × 10−36 1 × 10−33 1 × 10−30 1 × 10−27 1 × 10−24 1 × 10−23 1 × 10−22 1 × 10−21 1 × 10−20 1 × 10−19 1 × 10−18 1 × 10−15 1 × 10−12 1 × 10−9 1 × 10−6 1 × 10−3 1 1 × 103 1 × 106
1 zΩ 1 × 10−45 1 × 10−42 1 × 10−39 1 × 10−36 1 × 10−33 1 × 10−30 1 × 10−27 1 × 10−24 1 × 10−23 1 × 10−22 1 × 10−21 1 × 10−20 1 × 10−19 1 × 10−18 1 × 10−15 1 × 10−12 1 × 10−9 1 × 10−6 1 × 10−3 1 1 × 103
1 yΩ 1 × 10−48 1 × 10−45 1 × 10−42 1 × 10−39 1 × 10−36 1 × 10−33 1 × 10−30 1 × 10−27 1 × 10−26 1 × 10−25 1 × 10−24 1 × 10−23 1 × 10−22 1 × 10−21 1 × 10−18 1 × 10−15 1 × 10−12 1 × 10−9 1 × 10−6 1 × 10−3 1

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