Question 1 of 10
What is the SI unit for electric current?
The ampere (A) is the base unit in the International System of Units (SI) for measuring electric current.
Question 2 of 10
How is an ampere defined in terms of charge and time?
One ampere is defined as the flow of one coulomb of charge per second.
Question 3 of 10
What is the formula to calculate current (I) if you know the charge (Q) and time (t)?
The formula is I = Q / t, where I is current, Q is charge, and t is time.
Question 4 of 10
According to Ohm's Law, what is the formula to calculate current (I) if you know the voltage (V) and resistance (R)?
Ohm's Law states that I = V / R, where I is current, V is voltage, and R is resistance.
Question 5 of 10
What instrument is used to measure electric current?
An ammeter is specifically designed to measure the flow of electric current.
Question 6 of 10
How should an ammeter be connected in a circuit to measure current?
An ammeter must be connected in series so that all the current flowing through the circuit also flows through the ammeter.
Question 7 of 10
If a 12V voltage is applied across a 4? resistor, what is the current flowing through the resistor?
Using Ohm's Law (I = V/R), I = 12V / 4? = 3 Amps.
Question 8 of 10
If a light bulb consumes 30W of power at 12V, what is the current flowing through the bulb?
Using the formula I = P/V, I = 30W / 12V = 2.5 Amps.
Question 9 of 10
How many electrons are approximately equivalent to one ampere?
One ampere represents the flow of approximately 6.25 x 10^18 electrons per second.
Question 10 of 10
What is the current flowing through a wire if 10 Coulombs of charge pass a point in 5 seconds?
Using the formula I = Q/t, I = 10C / 5s = 2 Amps.
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