#1
Which of the following is a passive electronic component?
Resistor
ExplanationIt resists the flow of electrical current.
#2
What is the unit of electrical resistance?
Ohm
ExplanationIt measures the resistance of a conductor.
#3
In digital electronics, what does the term 'bit' stand for?
Binary Digit
ExplanationIt represents the basic unit of information.
#4
Which electronic component is commonly used for rectifying alternating current (AC) to direct current (DC)?
Diode
ExplanationIt allows current to flow in one direction only.
#5
What is the purpose of a voltage regulator in an electronic circuit?
To maintain a constant output voltage
ExplanationIt ensures a stable voltage output regardless of input variations.
#6
Which semiconductor device acts as an amplifier?
Transistor
ExplanationIt amplifies or increases the strength of electrical signals.
#7
What is the purpose of a capacitor in an electronic circuit?
To store and release electrical energy
ExplanationIt stores electric charge and releases it when needed.
#8
What is the primary function of a diode in an electronic circuit?
To control current flow
ExplanationIt allows current to flow in one direction and blocks it in the other.
#9
Which type of logic gate has an output that is true only when all of its inputs are true?
AND gate
ExplanationIt outputs true only if all input signals are true.
#10
In a resistor color code, what does the color red represent?
10
ExplanationIt represents the multiplier for the resistor's value.
#11
What does the term 'Ohm's Law' state?
Voltage is proportional to current
ExplanationIt defines the relationship between voltage, current, and resistance.
#12
What is the SI unit of electric charge?
Coulomb
ExplanationIt measures the quantity of electric charge.
#13
What is the primary purpose of a flyback diode in a circuit with an inductive load?
To protect against voltage spikes
ExplanationIt prevents voltage spikes that occur when the current changes.
#14
What is the purpose of a zener diode in a circuit?
To regulate voltage
ExplanationIt maintains a constant voltage across its terminals.
#15
What is the purpose of a phase-locked loop (PLL) in electronic systems?
To synchronize signals
ExplanationIt locks the phase of an output signal to a reference signal.