Physics · Grades 8–11
Charge transferred by current
Current is a rate of charge transfer; use seconds, not minutes, here.
Rule and assumptions
Current is a rate of charge transfer; use seconds, not minutes, here.
Q = It
Worked examples
A constant current of 2.9 A flows for 69 s. Find transferred charge. Round to 3 decimal places if needed. Answer in C.
Q = It 2.9 × 69 = 200.1
200.1 C
A constant current of 2.5 A flows for 18 s. Find transferred charge. Round to 3 decimal places if needed. Answer in C.
Q = It 2.5 × 18 = 45
45 C
Try two questions
A constant current of 1.7 A flows for 81 s. Find transferred charge. Round to 3 decimal places if needed. Answer in C.
A constant current of 2.8 A flows for 51 s. Find transferred charge. Round to 3 decimal places if needed. Answer in C.
Answers and reasoning
Answers and marking notes
- 137.7 C
Q = It 1.7 × 81 = 137.7
- 142.8 C
Q = It 2.8 × 51 = 142.8
Further reading and review references
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Learning preview · independent educational and translation review required. Suggested grades are not official curriculum alignment.