Question 1 of 10
What is the unit of electric current?
Electric current is measured in Amperes (A).
Question 2 of 10
Which of the following is the formula for calculating electric current?
Electric current (I) is calculated by dividing the charge (Q) by time (t).
Question 3 of 10
What type of current flows in one direction only?
Direct current (DC) flows in only one direction.
Question 4 of 10
What does a rectifier do?
A rectifier converts Alternating Current (AC) to Direct Current (DC).
Question 5 of 10
What effect does electric current have on a conductor?
Electric current can generate heat, create a magnetic field, and induce chemical reactions.
Question 6 of 10
What instrument is used to measure electric current?
An ammeter is used to measure electric current.
Question 7 of 10
According to Ohm's Law, what is the relationship between current (I), voltage (V), and resistance (R)?
Ohm's Law states that current (I) equals voltage (V) divided by resistance (R).
Question 8 of 10
If a resistor has 15 ohms of resistance and 60 volts are applied, what is the current flowing through it?
Using Ohm's Law (I = V/R), I = 60V / 15? = 4A.
Question 9 of 10
A 36W bulb is connected to a 24V supply. What is the current flowing through it?
Power (P) = Voltage (V) * Current (I). Therefore, I = P/V = 36W / 24V = 1.5A.
Question 10 of 10
An 80W bulb has 5 ohms of resistance. What is the current flowing through it?
First, find the voltage using P = V^2 / R. V = sqrt(P*R) = sqrt(80 * 5) = 20V. Then, use Ohm's Law: I = V/R = 20V/ 5? = 4A
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