ScienceAges 13-15

Electric charge & current (Q = It)

Use Q = It to calculate electric charge in coulombs from steady current and time. Review suitability for your learners before teaching.

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Age band:Ages 13-15 Ages 16-18

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Worksheet StudioPractice pack · Ages 13-15

Electric charge & current (Q = It)

Take your time. Show your thinking.

1. A steady current of 15 A flows through a lamp for 11 s. Calculate the total electric charge transferred using Q = It.
I = 15 A · t = 11 s
2. A steady current of 3 A flows through a lamp for 66 s. Calculate the total electric charge transferred using Q = It.
I = 3 A · t = 66 s
3. A steady current of 3 A flows through a lamp for 9 s. Calculate the total electric charge transferred using Q = It.
I = 3 A · t = 9 s
4. A steady current of 4 A flows through a lamp for 117 s. Calculate the total electric charge transferred using Q = It.
I = 4 A · t = 117 s
5. A steady current of 10 A flows through a lamp for 52 s. Calculate the total electric charge transferred using Q = It.
I = 10 A · t = 52 s
6. A steady current of 2 A flows through a lamp for 56 s. Calculate the total electric charge transferred using Q = It.
I = 2 A · t = 56 s
7. A steady current of 14 A flows through a lamp for 32 s. Calculate the total electric charge transferred using Q = It.
I = 14 A · t = 32 s
8. A steady current of 7 A flows through a lamp for 78 s. Calculate the total electric charge transferred using Q = It.
I = 7 A · t = 78 s
9. A steady current of 10 A flows through a lamp for 34 s. Calculate the total electric charge transferred using Q = It.
I = 10 A · t = 34 s
10. A steady current of 10 A flows through a lamp for 38 s. Calculate the total electric charge transferred using Q = It.
I = 10 A · t = 38 s
11. A steady current of 7 A flows through a lamp for 99 s. Calculate the total electric charge transferred using Q = It.
I = 7 A · t = 99 s
12. A steady current of 2 A flows through a lamp for 22 s. Calculate the total electric charge transferred using Q = It.
I = 2 A · t = 22 s

12 questions · Seed 45 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 13-15

Electric charge & current (Q = It)

Answers and reasoning. Review before teaching.

1. A steady current of 15 A flows through a lamp for 11 s. Calculate the total electric charge transferred using Q = It.
165 C
Charge Q = current × time = 15 A × 11 s = 165 C.
2. A steady current of 3 A flows through a lamp for 66 s. Calculate the total electric charge transferred using Q = It.
198 C
Charge Q = current × time = 3 A × 66 s = 198 C.
3. A steady current of 3 A flows through a lamp for 9 s. Calculate the total electric charge transferred using Q = It.
27 C
Charge Q = current × time = 3 A × 9 s = 27 C.
4. A steady current of 4 A flows through a lamp for 117 s. Calculate the total electric charge transferred using Q = It.
468 C
Charge Q = current × time = 4 A × 117 s = 468 C.
5. A steady current of 10 A flows through a lamp for 52 s. Calculate the total electric charge transferred using Q = It.
520 C
Charge Q = current × time = 10 A × 52 s = 520 C.
6. A steady current of 2 A flows through a lamp for 56 s. Calculate the total electric charge transferred using Q = It.
112 C
Charge Q = current × time = 2 A × 56 s = 112 C.
7. A steady current of 14 A flows through a lamp for 32 s. Calculate the total electric charge transferred using Q = It.
448 C
Charge Q = current × time = 14 A × 32 s = 448 C.
8. A steady current of 7 A flows through a lamp for 78 s. Calculate the total electric charge transferred using Q = It.
546 C
Charge Q = current × time = 7 A × 78 s = 546 C.
9. A steady current of 10 A flows through a lamp for 34 s. Calculate the total electric charge transferred using Q = It.
340 C
Charge Q = current × time = 10 A × 34 s = 340 C.
10. A steady current of 10 A flows through a lamp for 38 s. Calculate the total electric charge transferred using Q = It.
380 C
Charge Q = current × time = 10 A × 38 s = 380 C.
11. A steady current of 7 A flows through a lamp for 99 s. Calculate the total electric charge transferred using Q = It.
693 C
Charge Q = current × time = 7 A × 99 s = 693 C.
12. A steady current of 2 A flows through a lamp for 22 s. Calculate the total electric charge transferred using Q = It.
44 C
Charge Q = current × time = 2 A × 22 s = 44 C.

12 questions · Seed 45 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Electric charge & current (Q = It)

Take your time. Show your thinking.

1. A steady current of 15 A flows through a lamp for 11 s. Calculate the total electric charge transferred using Q = It.
I = 15 A · t = 11 s
2. A steady current of 3 A flows through a lamp for 66 s. Calculate the total electric charge transferred using Q = It.
I = 3 A · t = 66 s
3. A steady current of 3 A flows through a lamp for 9 s. Calculate the total electric charge transferred using Q = It.
I = 3 A · t = 9 s
4. A steady current of 4 A flows through a lamp for 117 s. Calculate the total electric charge transferred using Q = It.
I = 4 A · t = 117 s
5. A steady current of 10 A flows through a lamp for 52 s. Calculate the total electric charge transferred using Q = It.
I = 10 A · t = 52 s
6. A steady current of 2 A flows through a lamp for 56 s. Calculate the total electric charge transferred using Q = It.
I = 2 A · t = 56 s
7. A steady current of 14 A flows through a lamp for 32 s. Calculate the total electric charge transferred using Q = It.
I = 14 A · t = 32 s
8. A steady current of 7 A flows through a lamp for 78 s. Calculate the total electric charge transferred using Q = It.
I = 7 A · t = 78 s
9. A steady current of 10 A flows through a lamp for 34 s. Calculate the total electric charge transferred using Q = It.
I = 10 A · t = 34 s
10. A steady current of 10 A flows through a lamp for 38 s. Calculate the total electric charge transferred using Q = It.
I = 10 A · t = 38 s
11. A steady current of 7 A flows through a lamp for 99 s. Calculate the total electric charge transferred using Q = It.
I = 7 A · t = 99 s
12. A steady current of 2 A flows through a lamp for 22 s. Calculate the total electric charge transferred using Q = It.
I = 2 A · t = 22 s

12 questions · Seed 45 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Electric charge & current (Q = It)

Answers and reasoning. Review before teaching.

1. A steady current of 15 A flows through a lamp for 11 s. Calculate the total electric charge transferred using Q = It.
165 C
Charge Q = current × time = 15 A × 11 s = 165 C.
2. A steady current of 3 A flows through a lamp for 66 s. Calculate the total electric charge transferred using Q = It.
198 C
Charge Q = current × time = 3 A × 66 s = 198 C.
3. A steady current of 3 A flows through a lamp for 9 s. Calculate the total electric charge transferred using Q = It.
27 C
Charge Q = current × time = 3 A × 9 s = 27 C.
4. A steady current of 4 A flows through a lamp for 117 s. Calculate the total electric charge transferred using Q = It.
468 C
Charge Q = current × time = 4 A × 117 s = 468 C.
5. A steady current of 10 A flows through a lamp for 52 s. Calculate the total electric charge transferred using Q = It.
520 C
Charge Q = current × time = 10 A × 52 s = 520 C.
6. A steady current of 2 A flows through a lamp for 56 s. Calculate the total electric charge transferred using Q = It.
112 C
Charge Q = current × time = 2 A × 56 s = 112 C.
7. A steady current of 14 A flows through a lamp for 32 s. Calculate the total electric charge transferred using Q = It.
448 C
Charge Q = current × time = 14 A × 32 s = 448 C.
8. A steady current of 7 A flows through a lamp for 78 s. Calculate the total electric charge transferred using Q = It.
546 C
Charge Q = current × time = 7 A × 78 s = 546 C.
9. A steady current of 10 A flows through a lamp for 34 s. Calculate the total electric charge transferred using Q = It.
340 C
Charge Q = current × time = 10 A × 34 s = 340 C.
10. A steady current of 10 A flows through a lamp for 38 s. Calculate the total electric charge transferred using Q = It.
380 C
Charge Q = current × time = 10 A × 38 s = 380 C.
11. A steady current of 7 A flows through a lamp for 99 s. Calculate the total electric charge transferred using Q = It.
693 C
Charge Q = current × time = 7 A × 99 s = 693 C.
12. A steady current of 2 A flows through a lamp for 22 s. Calculate the total electric charge transferred using Q = It.
44 C
Charge Q = current × time = 2 A × 22 s = 44 C.

12 questions · Seed 45 · Age guidance, not curriculum certification