So that international people don't mistake units for others. ex 1 inch could be mistaken for 1 cm in non American countries
The domains in a magnet are aligned according to magnetic fields.
Answer:6amperes
Explanation:
1/R=1/40 + 1/40
1/R=2/40
Cross multiplying we get
2R=40
Divide both sides by 2
2R/2 =40/2
R=20ohms
Current=voltage ➗ resistance
Current=120 ➗ 20
Current =6amperes