Current & Charge Calculations Worksheet
current = charge moving past a point I=Q Units: I in A (amperes)
time t Q in C (coulombs)
t in s (seconds)
Basic: Find the unknown quantity – show your working in your books:
a) I = b) I = c) I = d) I = e) I = f) I =
Q=8C Q = 240 C Q = 400 C Q = 750 C Q = 300 C Q = 50 C
t = 20 s t = 300 s t = 200 s t = 350 s t = 100 s t =2s
g) Re- h) I = 2.5 A i) I = 5 A j) I = 13 A k) I = 10 A l) I = 6 A
arrange the Q= Q= Q= Q= Q=
equation for t = 300 s t = 200 s t = 350 s t = 100 s t =2s
Q
m) Re- n) I = 4 A o) I = 20 A p) I = 5 A q) I = 6 A r) I = 2.4 A
arrange the Q = 240 C Q = 400 C Q = 750 C Q = 300 C Q = 50 C
equation for t t = t = t = t = t =
Medium: Find the unknown quantity (CONVERT FIRST to SECONDS)
a) I = b) I = 0.3 A c) I = 0.9 A
Q = 140 C Q= Q=
t = 4 min = _______ s t = 1.5 hours = _______ s t = 3 min = _________ s
d) I = e) I = 1.5 A f) I = 0.4 A
Q = 200 C Q= Q=
t = 5 min = _______ s t = 2 hours = _______ s t = 7 min = _________ s
Hard: WORD PROBLEMS
1. How much current must there be in a circuit if 1000 coulombs flow past a point in the circuit
in 4 minutes?
2. A circuit is switched on for half a minute and 90 coulombs of charge flowed. What was the
current flowing through the circuit?
3. If there is a current of 10 mA in a circuit for 0.5 s, what quantity of electric charge flows in
through the circuit?
4. How much time is required for 0.3 coulombs of charge to flow past a point if the rate of flow
(current) is 2 mA?
5. During electrolysis 6A was passed through some copper chloride and a charge of 1.2 kC
flowed. How long was the experiment on for?
6. A bed lamp is switched on for 10 minutes. It works on a current of 0.5 A. How much charge
flowed?
Current & Charge Calculations Worksheet
current = charge moving past a point I=Q Units: I is A (amperes)
time t Q is C (coulombs)
t is s (seconds)
Basic: Find the unknown quantity – show your working in your books:
a) I = b) I = c) I = d) I = e) I = f) I =
Q=8C Q = 240 C Q = 400 C Q = 750 C Q = 300 C Q = 50 C
t = 20 s t = 300 s t = 200 s t = 350 s t = 100 s t =2s
g) Re- h) I = 2.5 A i) I = 5 A j) I = 13 A k) I = 10 A l) I = 6 A
arrange the Q= Q= Q= Q= Q=
equation for t = 300 s t = 200 s t = 350 s t = 100 s t =2s
Q
m) Re- n) I = 4 A o) I = 20 A p) I = 5 A q) I = 6 A r) I = 2.4 A
arrange the Q = 240 C Q = 400 C Q = 750 C Q = 300 C Q = 50 C
equation for t t = t = t = t = t =
Medium: Find the unknown quantity (CONVERT FIRST to SECONDS)
a) I = b) I = 0.3 A c) I = 0.9 A
Q = 140 C Q= Q=
t = 4 min = _______ s t = 1.5 hours = _______ s t = 3 min = _________ s
d) I = e) I = 1.5 A f) I = 0.4 A
Q = 200 C Q= Q=
t = 5 min = _______ s t = 2 hours = _______ s t = 7 min = _________ s
Hard: WORD PROBLEMS
1. How much current must there be in a circuit if 1000 coulombs flow past a point in the circuit
in 4 minutes?
2. A circuit is switched on for half a minute and 90 coulombs of charge flowed. What was the
current flowing through the circuit?
3. If there is a current of 10 mA in a circuit for 0.5 s, what quantity of electric charge flows in
through the circuit?
4. How much time is required for 0.3 coulombs of charge to flow past a point if the rate of flow
(current) is 2 mA?
5. During electrolysis 6A was passed through some copper chloride and a charge of 1.2 kC
flowed. How long was the experiment on for?
6. A bed lamp is switched on for 10 minutes. It works on a current of 0.5 A. How much charge
flowed?
