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Which of the following is an active electronic component?
A) Resistor
B) Diode
D) Inductor
C) Capacitor
Active components are devices that can:
A) Store energy only
D) Only provide resistance
B) Control current flow and amplify signals
C) Limit the current
What is the main function of a diode?
D) Block both directions of current
B) Allow current to flow in one direction only
C) Store charge
A) Amplify signals
The symbol of a diode shows an arrow pointing toward:
B) Anode
D) Power supply
A) Cathode
C) Both terminals
The symbol of a diode shows an arrow pointing toward:
A) Cathode
C) Both terminals
B) Anode
D) Power supply
In forward bias, a diode:
C) Blocks voltage completely
A) Does not conduct current
B) Conducts current easily (Pass current)
D) Works as an insulator
In reverse bias, a diode:
A) Conducts normally
B) Does not conduct (blocks current)
D) Becomes an amplifier
C) Acts as a switch
The function of a rectifier diode is:
A) Convert DC to AC
B) Convert AC to DC
C) Control voltage
D) Store energy
In a half-wave rectifier, output is obtained during:
B) Only the positive half cycle
A) Both half cycles of AC
D) No half cycle
C) Only the negative half cycle
In a full-wave bridge rectifier, how many diodes are used?
D) Four
A) One
D) Four
B) Two
What is the function of an LED?
C) Block current
D) Convert AC to DC
B) Store charge
A) Emit light when current passes through
The longer leg of an LED represents the:
D) Output terminal
A) Cathode (–)
B) Anode (+)
C) Ground
A transistor is mainly used for:
A) Amplifier and switching
D) Inductance
B) Rectification
C) Energy storage
How many terminals does a transistor have?
A) 2
C) 4
B) 3
D) 1
The three terminals of a transistor are:
B) Base, Collector, Emitter
D) Anode, Cathode, Grid
C) Input, Output, Ground
A) Source, Drain, Gate
An IC is a combination of:
D) Only capacitors
B) Multiple electronic components on a small chip
C) Only transistors
A) A single resistor
