Question 1 of 15
Which of the following is NOT a fundamental electrical quantity?
Power is derived from voltage and current. Voltage, current, and resistance are fundamental.
Question 2 of 15
What is the unit of electrical resistance?
Resistance is measured in Ohms (?), named after Georg Ohm.
Question 3 of 15
According to Ohm's Law, what is the relationship between voltage (V), current (I), and resistance (R)?
Ohm's Law states that Voltage equals Current multiplied by Resistance.
Question 4 of 15
What is the SI unit of electric current?
Electric current is measured in Amperes (A), often just called Amps.
Question 5 of 15
Which component opposes the flow of current in a circuit?
Resistors are specifically designed to limit or oppose the flow of current.
Question 6 of 15
What is the purpose of a fuse in an electrical circuit?
Fuses break the circuit if the current exceeds a safe level, preventing damage.
Question 7 of 15
What is the equivalent resistance of three 30-ohm resistors connected in series?
Series resistance adds up: R_total = R1 + R2 + R3 = 30 + 30 + 30 = 90 ohms.
Question 8 of 15
What is the unit of electrical power?
Electrical power is measured in Watts (W).
Question 9 of 15
In a parallel circuit, what remains constant across all components?
In parallel circuits, the voltage is the same across each branch.
Question 10 of 15
What is the formula for calculating power (P) in a DC circuit, given voltage (V) and current (I)?
Power is calculated as the product of voltage and current: P = V * I.
Question 11 of 15
What is a semiconductor?
Semiconductors have conductivity between a conductor and an insulator. Silicon and Germanium are examples.
Question 12 of 15
Which of the following is NOT a passive component?
Transistors are active components, capable of amplifying or switching signals.
Question 13 of 15
What is the primary function of a capacitor in a circuit?
Capacitors store electrical energy in the form of an electric field.
Question 14 of 15
What happens to the current in a series circuit if one component fails and opens the circuit?
An open circuit breaks the path, and current can no longer flow.
Question 15 of 15
What is the purpose of an inductor?
Inductors store energy in a magnetic field and oppose changes in current.
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