ScienceAges 16-18

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 16-18

Electric charge & current (Q = It)

Take your time. Show your thinking.

1. A steady current of 4 A flows through a lamp for 35 s. Calculate the total electric charge transferred using Q = It.
I = 4 A · t = 35 s
2. A steady current of 3 A flows through a lamp for 120 s. Calculate the total electric charge transferred using Q = It.
I = 3 A · t = 120 s
3. A steady current of 12 A flows through a lamp for 76 s. Calculate the total electric charge transferred using Q = It.
I = 12 A · t = 76 s
4. A steady current of 9 A flows through a lamp for 22 s. Calculate the total electric charge transferred using Q = It.
I = 9 A · t = 22 s
5. A steady current of 13 A flows through a lamp for 24 s. Calculate the total electric charge transferred using Q = It.
I = 13 A · t = 24 s
6. A steady current of 1 A flows through a lamp for 95 s. Calculate the total electric charge transferred using Q = It.
I = 1 A · t = 95 s
7. A steady current of 4 A flows through a lamp for 103 s. Calculate the total electric charge transferred using Q = It.
I = 4 A · t = 103 s
8. A steady current of 6 A flows through a lamp for 80 s. Calculate the total electric charge transferred using Q = It.
I = 6 A · t = 80 s
9. A steady current of 6 A flows through a lamp for 59 s. Calculate the total electric charge transferred using Q = It.
I = 6 A · t = 59 s
10. A steady current of 2 A flows through a lamp for 13 s. Calculate the total electric charge transferred using Q = It.
I = 2 A · t = 13 s
11. A steady current of 15 A flows through a lamp for 17 s. Calculate the total electric charge transferred using Q = It.
I = 15 A · t = 17 s
12. A steady current of 10 A flows through a lamp for 114 s. Calculate the total electric charge transferred using Q = It.
I = 10 A · t = 114 s

12 questions · Seed 58 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 16-18

Electric charge & current (Q = It)

Answers and reasoning. Review before teaching.

1. A steady current of 4 A flows through a lamp for 35 s. Calculate the total electric charge transferred using Q = It.
140 C
Charge Q = current × time = 4 A × 35 s = 140 C.
2. A steady current of 3 A flows through a lamp for 120 s. Calculate the total electric charge transferred using Q = It.
360 C
Charge Q = current × time = 3 A × 120 s = 360 C.
3. A steady current of 12 A flows through a lamp for 76 s. Calculate the total electric charge transferred using Q = It.
912 C
Charge Q = current × time = 12 A × 76 s = 912 C.
4. A steady current of 9 A flows through a lamp for 22 s. Calculate the total electric charge transferred using Q = It.
198 C
Charge Q = current × time = 9 A × 22 s = 198 C.
5. A steady current of 13 A flows through a lamp for 24 s. Calculate the total electric charge transferred using Q = It.
312 C
Charge Q = current × time = 13 A × 24 s = 312 C.
6. A steady current of 1 A flows through a lamp for 95 s. Calculate the total electric charge transferred using Q = It.
95 C
Charge Q = current × time = 1 A × 95 s = 95 C.
7. A steady current of 4 A flows through a lamp for 103 s. Calculate the total electric charge transferred using Q = It.
412 C
Charge Q = current × time = 4 A × 103 s = 412 C.
8. A steady current of 6 A flows through a lamp for 80 s. Calculate the total electric charge transferred using Q = It.
480 C
Charge Q = current × time = 6 A × 80 s = 480 C.
9. A steady current of 6 A flows through a lamp for 59 s. Calculate the total electric charge transferred using Q = It.
354 C
Charge Q = current × time = 6 A × 59 s = 354 C.
10. A steady current of 2 A flows through a lamp for 13 s. Calculate the total electric charge transferred using Q = It.
26 C
Charge Q = current × time = 2 A × 13 s = 26 C.
11. A steady current of 15 A flows through a lamp for 17 s. Calculate the total electric charge transferred using Q = It.
255 C
Charge Q = current × time = 15 A × 17 s = 255 C.
12. A steady current of 10 A flows through a lamp for 114 s. Calculate the total electric charge transferred using Q = It.
1140 C
Charge Q = current × time = 10 A × 114 s = 1140 C.

12 questions · Seed 58 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Electric charge & current (Q = It)

Take your time. Show your thinking.

1. A steady current of 4 A flows through a lamp for 35 s. Calculate the total electric charge transferred using Q = It.
I = 4 A · t = 35 s
2. A steady current of 3 A flows through a lamp for 120 s. Calculate the total electric charge transferred using Q = It.
I = 3 A · t = 120 s
3. A steady current of 12 A flows through a lamp for 76 s. Calculate the total electric charge transferred using Q = It.
I = 12 A · t = 76 s
4. A steady current of 9 A flows through a lamp for 22 s. Calculate the total electric charge transferred using Q = It.
I = 9 A · t = 22 s
5. A steady current of 13 A flows through a lamp for 24 s. Calculate the total electric charge transferred using Q = It.
I = 13 A · t = 24 s
6. A steady current of 1 A flows through a lamp for 95 s. Calculate the total electric charge transferred using Q = It.
I = 1 A · t = 95 s
7. A steady current of 4 A flows through a lamp for 103 s. Calculate the total electric charge transferred using Q = It.
I = 4 A · t = 103 s
8. A steady current of 6 A flows through a lamp for 80 s. Calculate the total electric charge transferred using Q = It.
I = 6 A · t = 80 s
9. A steady current of 6 A flows through a lamp for 59 s. Calculate the total electric charge transferred using Q = It.
I = 6 A · t = 59 s
10. A steady current of 2 A flows through a lamp for 13 s. Calculate the total electric charge transferred using Q = It.
I = 2 A · t = 13 s
11. A steady current of 15 A flows through a lamp for 17 s. Calculate the total electric charge transferred using Q = It.
I = 15 A · t = 17 s
12. A steady current of 10 A flows through a lamp for 114 s. Calculate the total electric charge transferred using Q = It.
I = 10 A · t = 114 s

12 questions · Seed 58 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Electric charge & current (Q = It)

Answers and reasoning. Review before teaching.

1. A steady current of 4 A flows through a lamp for 35 s. Calculate the total electric charge transferred using Q = It.
140 C
Charge Q = current × time = 4 A × 35 s = 140 C.
2. A steady current of 3 A flows through a lamp for 120 s. Calculate the total electric charge transferred using Q = It.
360 C
Charge Q = current × time = 3 A × 120 s = 360 C.
3. A steady current of 12 A flows through a lamp for 76 s. Calculate the total electric charge transferred using Q = It.
912 C
Charge Q = current × time = 12 A × 76 s = 912 C.
4. A steady current of 9 A flows through a lamp for 22 s. Calculate the total electric charge transferred using Q = It.
198 C
Charge Q = current × time = 9 A × 22 s = 198 C.
5. A steady current of 13 A flows through a lamp for 24 s. Calculate the total electric charge transferred using Q = It.
312 C
Charge Q = current × time = 13 A × 24 s = 312 C.
6. A steady current of 1 A flows through a lamp for 95 s. Calculate the total electric charge transferred using Q = It.
95 C
Charge Q = current × time = 1 A × 95 s = 95 C.
7. A steady current of 4 A flows through a lamp for 103 s. Calculate the total electric charge transferred using Q = It.
412 C
Charge Q = current × time = 4 A × 103 s = 412 C.
8. A steady current of 6 A flows through a lamp for 80 s. Calculate the total electric charge transferred using Q = It.
480 C
Charge Q = current × time = 6 A × 80 s = 480 C.
9. A steady current of 6 A flows through a lamp for 59 s. Calculate the total electric charge transferred using Q = It.
354 C
Charge Q = current × time = 6 A × 59 s = 354 C.
10. A steady current of 2 A flows through a lamp for 13 s. Calculate the total electric charge transferred using Q = It.
26 C
Charge Q = current × time = 2 A × 13 s = 26 C.
11. A steady current of 15 A flows through a lamp for 17 s. Calculate the total electric charge transferred using Q = It.
255 C
Charge Q = current × time = 15 A × 17 s = 255 C.
12. A steady current of 10 A flows through a lamp for 114 s. Calculate the total electric charge transferred using Q = It.
1140 C
Charge Q = current × time = 10 A × 114 s = 1140 C.

12 questions · Seed 58 · Age guidance, not curriculum certification