1 mark for the correct substitution into the formula
(1 mark for converting minutes in s etc).
1 mark for calculating the correct answer.
1 mark for the correct unit
1. A current of
2 amps flows in a circuit. How
much charge passes through a point in 30 seconds? 60 C
2. A current of
5 amps flows in a circuit. How
much charge passes through a point in 50s?
250 C
3. A current of
0.5 amps flows in a circuit. How
much charge passes through a point in the circuit in 2 minutes. Q = It Q =
0.5 x (2 x 60) s = 60 C
4.
A current of 0.25 amps flows in a circuit. How much charge passes through a point in the
circuit in 1 hour. Q = It Q = 0.25 x (1
x 60 x 60)s = 900 C
5.
A current of 20 mA flows in a circuit. How much charge passes through a point in the
circuit in 1 min 30 sec. Q = It Q = (20 ÷ 1000) x ( 60 + 30)s = 1.8 C
6. A
charge of 60 coulombs passes a point a circuit in 10 secs. Calculate the current flowing. 6A
7.
A charge of 14 coulombs passes a point a
circuit in 7 sec. Calculate the current
flowing. 2A
8.
A charge of 10 coulombs passes a point a
circuit in 12 sec. Calculate the current
flowing. 0.83A
9.
A charge of 120 coulombs passes a point
a circuit in 1 min. Calculate the
current flowing.
I = Q ÷ t = 120 ÷ 60s = 2A
10.
A charge of 6000 coulombs passes a point
a circuit in 1 hr. Calculate the current
flowing.
I = Q ÷ t = 6000 ÷ 3660s =
1.67A
11. A current
of 2 amps flows in a
circuit. How long does it take for 8
coulombs to flow past a certain point? 4s
12.
A current of 10 amps flows in a circuit. How long does it take for 50 coulombs to
flow past a certain point? 5s
13.
A current of 0.5 amps flows in a circuit. How long does it take for 100 coulombs to
flow past a certain point? 200s
14.
A current of 4 amps flows in a circuit. How long does it take for 1000 coulombs to
flow past a certain point? 250s
15.
A current of 0.3 amps flows in a circuit. How long does it take for 15 coulombs to
flow past a certain point? 50s
