Worksheet: Electric Current
In this worksheet, we will practice using the formula I = Q/t to calculate the current through a point in simple circuits given the charge moving past that point in a given time.
Q3:
The diagram shows a circuit consisting of a battery and a resistor. The current through the circuit is 2.0 A. Over a period of 45 seconds, how much charge flows past point P in the circuit?
Q4:
Which of the following is the correct formula for the amount of charge flowing through a point in a circuit in a given time? represents the amount of charge, represents the current, and represents time.
- A
- B
- C
- D
Q5:
Which of the following is the correct unit for electric charge?
- AVolt
- BAmpere
- CJoule
- DCoulomb
Q6:
Which of the following is the correct unit for electric current?
- AJoule
- BVolt
- CWatt
- DAmpere
Q7:
A rechargeable battery is left to charge for a period of time. It is charged with a current of 10 mA. After it has finished, the battery has gained 180 C of charge. For how many hours was the battery left to charge?
Q8:
Which of the following is the correct formula for the current through a point in a circuit? represents the current, represents the amount of charge, and represents time.
- A
- B
- C
- D
Q9:
The diagram shows a circuit consisting of a battery and a light-emitting diode (LED). Over a period of 25 seconds, a charge of 50 coulombs passes through point in the circuit. What is the current in the circuit during this period?
Q10:
How many milliamperes are there in 1 ampere?