Electronic Devices Quiz

Which electronic device converts digital signals into analog signals?

• Demodulator

• Amplifier

• Oscillator

• Modulator

In the context of transistors, what does the term "NPN" refer to?

• A voltage level

• The arrangement of semiconductor materials

• A type of amplifier

• A type of diode

What is the primary purpose of a capacitor in electronic circuits?

• To increase voltage

• To function as a switch

• To store electrical energy

• To convert signals

Which of the following describes an integrated circuit (IC)?

• A collection of electronic components integrated into one unit

• A method of cooling devices

• A single transistor

• A type of resistor

In a closed circuit, Kirchhoff's First Law states that:

• Voltage is constant in a series circuit.

• The total voltage around a loop must equal zero.

• The total resistance is equal to the product of resistances.

• The sum of currents entering a junction equals the sum of currents leaving it.

If 12V is applied across a 3Ω resistor, what is the power P dissipated in the resistor?

• 12W

• 36W

• 8W

• 4W

What is the output of a NAND gate if both inputs are true?

• True

• Undefined

• Zero

• False

Which logic gate is represented by the following truth table?

• AND

• OR

• NOR

• NAND

In a transmission line, what does the term "reflection coefficient" refer to?

• The length of the transmission line

• The frequency of operation

• The ratio of the incident wave to the reflected wave

• The total power lost in the line

Which of the following statements is true about the sizeof operator in C?

• It can be used with types and variables.

• It returns the size in bits.

• It yields a float type result.

• It cannot be used with arrays.