Question 1 of 10
What does an Ampere (A) measure?
An Ampere is the unit of electric current.
Question 2 of 10
What is the formula for calculating current (I) in terms of charge (Q) and time (t)?
The formula for current is I = Q / t, where Q is the charge and t is the time.
Question 3 of 10
If 10 Coulombs of charge pass a point in a circuit in 5 seconds, what is the current?
Using I = Q / t, I = 10 C / 5 s = 2 A.
Question 4 of 10
What is the formula to calculate current (I) if you know the power (P) and voltage (V)?
The formula to calculate current using power and voltage is I = P / V.
Question 5 of 10
What is the formula for calculating current (I) if you know the voltage (V) and resistance (R)?
Ohm's Law states I = V / R.
Question 6 of 10
What unit is used to measure electric current?
The Ampere (A) is the base unit for electric current.
Question 7 of 10
How should an ammeter be connected in a circuit to measure current?
An ammeter must be connected in series to measure the current flowing through a component or circuit.
Question 8 of 10
A 30W LED bulb operates at 12V. What is the current flowing through it?
Using I = P / V, I = 30 W / 12 V = 2.5 A
Question 9 of 10
A 500W light bulb has a resistance of 5 Ohms. What is the current flowing through it?
Using I = sqrt(P/R), I = sqrt(500W/5Ohms) = 10A (Alternatively, you could first find voltage then use V/R)
Question 10 of 10
Which of the following instruments is used to measure electric current?
An ammeter is specifically designed to measure electric current.
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