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.

New variation Try interactive challenge Browse templates

Age band:Ages 13-15 Ages 16-18

Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.

Worksheet StudioPractice pack · Ages 13-15

Electric charge & current (Q = It)

Take your time. Show your thinking.

1. A steady current of 11 A flows through a lamp for 30 s. Calculate the total electric charge transferred using Q = It.
I = 11 A · t = 30 s
2. A steady current of 11 A flows through a lamp for 80 s. Calculate the total electric charge transferred using Q = It.
I = 11 A · t = 80 s
3. A steady current of 12 A flows through a lamp for 36 s. Calculate the total electric charge transferred using Q = It.
I = 12 A · t = 36 s
4. A steady current of 11 A flows through a lamp for 38 s. Calculate the total electric charge transferred using Q = It.
I = 11 A · t = 38 s
5. A steady current of 12 A flows through a lamp for 59 s. Calculate the total electric charge transferred using Q = It.
I = 12 A · t = 59 s
6. A steady current of 4 A flows through a lamp for 110 s. Calculate the total electric charge transferred using Q = It.
I = 4 A · t = 110 s
7. A steady current of 9 A flows through a lamp for 8 s. Calculate the total electric charge transferred using Q = It.
I = 9 A · t = 8 s
8. A steady current of 14 A flows through a lamp for 33 s. Calculate the total electric charge transferred using Q = It.
I = 14 A · t = 33 s
9. A steady current of 6 A flows through a lamp for 45 s. Calculate the total electric charge transferred using Q = It.
I = 6 A · t = 45 s
10. A steady current of 5 A flows through a lamp for 108 s. Calculate the total electric charge transferred using Q = It.
I = 5 A · t = 108 s
11. A steady current of 11 A flows through a lamp for 22 s. Calculate the total electric charge transferred using Q = It.
I = 11 A · t = 22 s
12. A steady current of 3 A flows through a lamp for 41 s. Calculate the total electric charge transferred using Q = It.
I = 3 A · t = 41 s

12 questions · Seed 43 · 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 11 A flows through a lamp for 30 s. Calculate the total electric charge transferred using Q = It.
330 C
Charge Q = current × time = 11 A × 30 s = 330 C.
2. A steady current of 11 A flows through a lamp for 80 s. Calculate the total electric charge transferred using Q = It.
880 C
Charge Q = current × time = 11 A × 80 s = 880 C.
3. A steady current of 12 A flows through a lamp for 36 s. Calculate the total electric charge transferred using Q = It.
432 C
Charge Q = current × time = 12 A × 36 s = 432 C.
4. A steady current of 11 A flows through a lamp for 38 s. Calculate the total electric charge transferred using Q = It.
418 C
Charge Q = current × time = 11 A × 38 s = 418 C.
5. A steady current of 12 A flows through a lamp for 59 s. Calculate the total electric charge transferred using Q = It.
708 C
Charge Q = current × time = 12 A × 59 s = 708 C.
6. A steady current of 4 A flows through a lamp for 110 s. Calculate the total electric charge transferred using Q = It.
440 C
Charge Q = current × time = 4 A × 110 s = 440 C.
7. A steady current of 9 A flows through a lamp for 8 s. Calculate the total electric charge transferred using Q = It.
72 C
Charge Q = current × time = 9 A × 8 s = 72 C.
8. A steady current of 14 A flows through a lamp for 33 s. Calculate the total electric charge transferred using Q = It.
462 C
Charge Q = current × time = 14 A × 33 s = 462 C.
9. A steady current of 6 A flows through a lamp for 45 s. Calculate the total electric charge transferred using Q = It.
270 C
Charge Q = current × time = 6 A × 45 s = 270 C.
10. A steady current of 5 A flows through a lamp for 108 s. Calculate the total electric charge transferred using Q = It.
540 C
Charge Q = current × time = 5 A × 108 s = 540 C.
11. A steady current of 11 A flows through a lamp for 22 s. Calculate the total electric charge transferred using Q = It.
242 C
Charge Q = current × time = 11 A × 22 s = 242 C.
12. A steady current of 3 A flows through a lamp for 41 s. Calculate the total electric charge transferred using Q = It.
123 C
Charge Q = current × time = 3 A × 41 s = 123 C.

12 questions · Seed 43 · 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 11 A flows through a lamp for 30 s. Calculate the total electric charge transferred using Q = It.
I = 11 A · t = 30 s
2. A steady current of 11 A flows through a lamp for 80 s. Calculate the total electric charge transferred using Q = It.
I = 11 A · t = 80 s
3. A steady current of 12 A flows through a lamp for 36 s. Calculate the total electric charge transferred using Q = It.
I = 12 A · t = 36 s
4. A steady current of 11 A flows through a lamp for 38 s. Calculate the total electric charge transferred using Q = It.
I = 11 A · t = 38 s
5. A steady current of 12 A flows through a lamp for 59 s. Calculate the total electric charge transferred using Q = It.
I = 12 A · t = 59 s
6. A steady current of 4 A flows through a lamp for 110 s. Calculate the total electric charge transferred using Q = It.
I = 4 A · t = 110 s
7. A steady current of 9 A flows through a lamp for 8 s. Calculate the total electric charge transferred using Q = It.
I = 9 A · t = 8 s
8. A steady current of 14 A flows through a lamp for 33 s. Calculate the total electric charge transferred using Q = It.
I = 14 A · t = 33 s
9. A steady current of 6 A flows through a lamp for 45 s. Calculate the total electric charge transferred using Q = It.
I = 6 A · t = 45 s
10. A steady current of 5 A flows through a lamp for 108 s. Calculate the total electric charge transferred using Q = It.
I = 5 A · t = 108 s
11. A steady current of 11 A flows through a lamp for 22 s. Calculate the total electric charge transferred using Q = It.
I = 11 A · t = 22 s
12. A steady current of 3 A flows through a lamp for 41 s. Calculate the total electric charge transferred using Q = It.
I = 3 A · t = 41 s

12 questions · Seed 43 · 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 11 A flows through a lamp for 30 s. Calculate the total electric charge transferred using Q = It.
330 C
Charge Q = current × time = 11 A × 30 s = 330 C.
2. A steady current of 11 A flows through a lamp for 80 s. Calculate the total electric charge transferred using Q = It.
880 C
Charge Q = current × time = 11 A × 80 s = 880 C.
3. A steady current of 12 A flows through a lamp for 36 s. Calculate the total electric charge transferred using Q = It.
432 C
Charge Q = current × time = 12 A × 36 s = 432 C.
4. A steady current of 11 A flows through a lamp for 38 s. Calculate the total electric charge transferred using Q = It.
418 C
Charge Q = current × time = 11 A × 38 s = 418 C.
5. A steady current of 12 A flows through a lamp for 59 s. Calculate the total electric charge transferred using Q = It.
708 C
Charge Q = current × time = 12 A × 59 s = 708 C.
6. A steady current of 4 A flows through a lamp for 110 s. Calculate the total electric charge transferred using Q = It.
440 C
Charge Q = current × time = 4 A × 110 s = 440 C.
7. A steady current of 9 A flows through a lamp for 8 s. Calculate the total electric charge transferred using Q = It.
72 C
Charge Q = current × time = 9 A × 8 s = 72 C.
8. A steady current of 14 A flows through a lamp for 33 s. Calculate the total electric charge transferred using Q = It.
462 C
Charge Q = current × time = 14 A × 33 s = 462 C.
9. A steady current of 6 A flows through a lamp for 45 s. Calculate the total electric charge transferred using Q = It.
270 C
Charge Q = current × time = 6 A × 45 s = 270 C.
10. A steady current of 5 A flows through a lamp for 108 s. Calculate the total electric charge transferred using Q = It.
540 C
Charge Q = current × time = 5 A × 108 s = 540 C.
11. A steady current of 11 A flows through a lamp for 22 s. Calculate the total electric charge transferred using Q = It.
242 C
Charge Q = current × time = 11 A × 22 s = 242 C.
12. A steady current of 3 A flows through a lamp for 41 s. Calculate the total electric charge transferred using Q = It.
123 C
Charge Q = current × time = 3 A × 41 s = 123 C.

12 questions · Seed 43 · Age guidance, not curriculum certification