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Electronics MDCAT MCQs with Answers

Electronics MDCAT MCQs

Welcome to the Electronics MDCAT MCQs with Answers. In this post, we have shared Electronics Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Physics offers a chance to enhance your knowledge regarding Electronics MCQs in this MDCAT Online Test.

Electronics MDCAT MCQs Test Preparations

What is the primary function of a diode?
a) Amplify signals
b) Block AC and allow DC to pass
c) Convert AC to DC
d) Store electrical energy

Answer
b) Block AC and allow DC to pass

Which component is used to store electrical charge in a circuit?
a) Resistor
b) Capacitor
c) Inductor
d) Diode

Answer
b) Capacitor

The unit of capacitance is:
a) Ohm
b) Henry
c) Farad
d) Volt

Answer
c) Farad

Which of the following is a semiconductor device?
a) Resistor
b) Capacitor
c) Transistor
d) Inductor

Answer
c) Transistor

In a transistor, which terminal is the control terminal?
a) Emitter
b) Collector
c) Base
d) Gate

Answer
c) Base

Which type of transistor is known for current amplification?
a) Field Effect Transistor (FET)
b) Bipolar Junction Transistor (BJT)
c) Unipolar Transistor
d) Tunnel Transistor

Answer
b) Bipolar Junction Transistor (BJT)

The function of a resistor in a circuit is to:
a) Block DC
b) Store energy
c) Limit current flow
d) Amplify signals

Answer
c) Limit current flow

What is the unit of electrical resistance?
a) Ohm
b) Watt
c) Farad
d) Ampere

Answer
a) Ohm

Which electronic component is used to regulate voltage in a circuit?
a) Resistor
b) Capacitor
c) Voltage regulator
d) Diode

Answer
c) Voltage regulator

In a series circuit, the total resistance is:
a) The sum of the individual resistances
b) The reciprocal of the sum of the reciprocals of individual resistances
c) The average of individual resistances
d) Equal to the highest resistance

Answer
a) The sum of the individual resistances

What does an op-amp (operational amplifier) primarily do?
a) Store charge
b) Amplify voltage
c) Regulate current
d) Convert AC to DC

Answer
b) Amplify voltage

Which of the following is a common type of logic gate?
a) Transformer
b) Amplifier
c) NAND
d) Capacitor

Answer
c) NAND

The frequency range of a typical audio signal is:
a) 20 Hz to 20 kHz
b) 1 kHz to 1 MHz
c) 1 Hz to 1 kHz
d) 10 kHz to 100 MHz

Answer
a) 20 Hz to 20 kHz

What is the primary function of a transformer in an electronic circuit?
a) Store electrical energy
b) Convert signal frequency
c) Change the voltage level
d) Filter noise

Answer
c) Change the voltage level

In a capacitive reactance circuit, reactance decreases with:
a) Increasing frequency
b) Decreasing frequency
c) Increasing capacitance
d) Decreasing capacitance

Answer
a) Increasing frequency

What is the primary use of a diode in rectification circuits?
a) To amplify signals
b) To convert AC to DC
c) To store energy
d) To control current flow

Answer
b) To convert AC to DC

The gain of an amplifier is defined as:
a) The ratio of output voltage to input voltage
b) The difference between input and output voltages
c) The total power of the circuit
d) The rate of frequency change

Answer
a) The ratio of output voltage to input voltage

In a digital circuit, which logic gate outputs true only when both inputs are true?
a) OR gate
b) AND gate
c) NOT gate
d) XOR gate

Answer
b) AND gate

Which of the following is a non-linear device?
a) Resistor
b) Capacitor
c) Diode
d) Inductor

Answer
c) Diode

In a transistor, which terminal is used to control the current flow between the emitter and collector?
a) Base
b) Emitter
c) Collector
d) Gate

Answer
a) Base

Which component is used to prevent current flow in the reverse direction?
a) Resistor
b) Inductor
c) Diode
d) Capacitor

Answer
c) Diode

The characteristic curve of a diode is called:
a) Load line
b) Transfer curve
c) V-I curve
d) Frequency response curve

Answer
c) V-I curve

What is the typical forward voltage drop across a silicon diode?
a) 0.2 V
b) 0.7 V
c) 1.2 V
d) 2.0 V

Answer
b) 0.7 V

In an RC circuit, the time constant (τ) is given by:
a) R × C
b) R / C
c) C / R
d) 1 / (R × C)

Answer
a) R × C

Which type of amplifier is used to increase the power of a signal?
a) Operational amplifier
b) Voltage amplifier
c) Current amplifier
d) Power amplifier

Answer
d) Power amplifier

What is the function of a rectifier circuit?
a) Convert AC to DC
b) Amplify signals
c) Store energy
d) Filter signals

Answer
a) Convert AC to DC

Which component can be used to generate a square wave signal?
a) Oscillator
b) Diode
c) Transistor
d) Capacitor

Answer
a) Oscillator

What is the primary function of a transistor in switching applications?
a) Amplify the input signal
b) Convert AC to DC
c) Act as a switch to control current flow
d) Store charge

Answer
c) Act as a switch to control current flow

Which type of logic gate produces an output that is true only when exactly one of its inputs is true?
a) OR gate
b) AND gate
c) XOR gate
d) NOT gate

Answer
c) XOR gate

The basic unit of digital information in electronics is called a:
a) Byte
b) Bit
c) Nibble
d) Word

Answer
b) Bit

Which component is used to protect circuits from overvoltage conditions?
a) Capacitor
b) Resistor
c) Zener diode
d) Transistor

Answer
c) Zener diode

In a common-emitter transistor configuration, which terminal is the output terminal?
a) Base
b) Collector
c) Emitter
d) Gate

Answer
b) Collector

Which of the following is a linear component?
a) Diode
b) Transistor
c) Resistor
d) LED

Answer
c) Resistor

What is the main purpose of a capacitor in a filter circuit?
a) To amplify signals
b) To store electrical energy
c) To block DC and pass AC
d) To smooth out fluctuations in voltage

Answer
d) To smooth out fluctuations in voltage

Which device is used to convert light into electrical signals?
a) Diode
b) Phototransistor
c) Capacitor
d) Resistor

Answer
b) Phototransistor

In digital electronics, what does a flip-flop do?
a) Stores binary data
b) Amplifies signals
c) Converts analog to digital signals
d) Filters noise

Answer
a) Stores binary data

Which of the following is a characteristic of an ideal op-amp?
a) Infinite gain
b) Zero output impedance
c) Infinite input impedance
d) All of the above

Answer
d) All of the above

The term “biasing” in a transistor circuit refers to:
a) Setting the operating point
b) Increasing signal gain
c) Reducing power consumption
d) Decreasing input resistance

Answer
a) Setting the operating point

Which of the following is an active electronic component?
a) Resistor
b) Inductor
c) Diode
d) Capacitor

Answer
c) Diode

In a digital logic circuit, what does a NOT gate do?
a) Outputs the inverse of the input
b) Outputs the sum of inputs
c) Outputs the product of inputs
d) Inverts the input signal

Answer
a) Outputs the inverse of the input

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