KTU Previous Question Papers With Answers PDF

Students preparing for KTU exams can benefit from practicing with previous question papers. These question papers provide insights into the exam pattern, types of questions asked, and the key areas to focus on. By solving these, students can improve their understanding of the subjects and boost their confidence for exams.

Question: What is the main principle behind Ohm’s law?

Answer: The current through a conductor between two points is directly proportional to the voltage across the two points.

Question: Explain Kirchhoff’s Current Law.

Answer: The total current entering a junction equals the total current leaving the junction.

Question: What is a PN junction diode?

Answer: It is a semiconductor device formed by joining p-type and n-type materials, used to control the flow of current in a circuit.

Question: How does a transistor amplify signals?

Answer: A transistor amplifies signals by using a small input current to control a larger output current, enabling signal amplification.

Question: What is the difference between AC and DC currents?

Answer: AC current alternates its direction periodically, while DC current flows in only one direction.

Question: Define capacitance.

Answer: Capacitance is the ability of a system to store charge per unit voltage.

Question: What is the function of a rectifier?

Answer: A rectifier converts alternating current (AC) into direct current (DC).

Question: Explain the working of a Zener diode.

Answer: A Zener diode allows current to flow in the reverse direction when the voltage exceeds a certain value, known as the Zener breakdown voltage.

Question: What is the role of a capacitor in an electrical circuit?

Answer: A capacitor stores electrical energy and releases it when required, stabilizing the voltage and power flow in a circuit.

Question: What are the applications of operational amplifiers?

Answer: Operational amplifiers are used in various applications such as voltage amplification, filtering, and oscillators.

Question: What is a logic gate?

Answer: A logic gate is an electronic device that performs a logical operation on one or more inputs to produce a single output.

Question: Explain the significance of feedback in electronic circuits.

Answer: Feedback improves the stability, accuracy, and bandwidth of electronic circuits by feeding part of the output back into the input.

Question: What are the characteristics of a good conductor?

Answer: A good conductor allows electricity to flow easily, has low resistivity, and is made of materials like copper or aluminum.

Question: What is the purpose of a voltage regulator?

Answer: A voltage regulator maintains a constant output voltage regardless of input voltage changes or load conditions.

Question: Describe the working of a transformer.

Answer: A transformer transfers electrical energy between circuits through electromagnetic induction, typically stepping up or stepping down voltage.

Question: What is the difference between analog and digital signals?

Answer: Analog signals are continuous and can have any value, while digital signals are discrete and have specific values.

Question: Define the term ‘inductance.’

Answer: Inductance is the property of a conductor by which a change in current generates an electromotive force (EMF).

Question: What is a BJT (Bipolar Junction Transistor)?

Answer: A BJT is a type of transistor that uses both electron and hole charge carriers for its operation.

Question: What is the function of a relay in a circuit?

Answer: A relay is an electrically operated switch that allows a low power signal to control a high power circuit.

Question: Explain the purpose of a fuse in an electrical circuit.

Answer: A fuse protects an electrical circuit from excessive current by breaking the circuit when the current exceeds a certain level.

Question: What is the difference between active and passive components in electronics?

Answer: Active components like transistors can amplify signals, while passive components like resistors cannot amplify but only consume or store energy.

Question: What are the uses of a Schottky diode?

Answer: Schottky diodes are used in applications requiring fast switching and low forward voltage drops, such as in power rectifiers.

Question: Explain the concept of resonance in electrical circuits.

Answer: Resonance occurs when the inductive and capacitive reactances in a circuit cancel each other out, resulting in maximum voltage and current.

Question: What is a signal generator?

Answer: A signal generator produces electrical signals of varying frequencies and amplitudes, used for testing and designing electronic circuits.

Question: What is an inverter?

Answer: An inverter converts direct current (DC) into alternating current (AC), commonly used in power backup systems.

Question: What is the function of an amplifier?

Answer: An amplifier increases the amplitude of a signal without changing its other characteristics.

Question: What is the role of an oscillator in electronic circuits?

Answer: An oscillator generates a continuous waveform, commonly used in communication devices and signal processing.

Question: Define the term ‘semiconductor.’

Answer: A semiconductor is a material whose conductivity lies between that of a conductor and an insulator, used in electronic devices.

Question: Explain the difference between series and parallel circuits.

Answer: In a series circuit, components are connected end-to-end, and current flows through each in turn. In a parallel circuit, components are connected across the same voltage source, and current flows independently through each.

Question: What is the principle of electromagnetic induction?

Answer: Electromagnetic induction is the process by which a changing magnetic field induces an electromotive force (EMF) in a conductor.

Question: What is a switch-mode power supply (SMPS)?

Answer: SMPS is an electronic power supply that uses switching regulators to convert electrical power efficiently.

Question: What is a photodiode?

Answer: A photodiode is a semiconductor device that converts light into electrical current.

Question: How does a digital multimeter work?

Answer: A digital multimeter measures voltage, current, and resistance by converting analog signals into digital values for display.

Question: Explain the use of thermal resistors (thermistors) in circuits.

Answer: Thermistors are used to measure temperature, and their resistance varies with changes in temperature.

Question: What is the use of a frequency counter?

Answer: A frequency counter measures the frequency of an incoming signal, commonly used in communication and signal processing.

Question: What are the advantages of fiber optic communication?

Answer: Fiber optic communication offers high-speed data transmission, greater bandwidth, and immunity to electromagnetic interference.

Question: What is the purpose of a microcontroller?

Answer: A microcontroller is a small computer on a chip used to control electronic devices, typically found in embedded systems.

Question: Explain the working of a pulse width modulation (PWM) technique.

Answer: PWM is a technique used to control the power delivered to a device by varying the width of the pulses in a pulse train.

Question: What is the role of an op-amp in analog circuits?

Answer: An operational amplifier (op-amp) is used in analog circuits for signal amplification, filtering, and mathematical operations like addition and subtraction.

Question: What is the difference between volatile and non-volatile memory?

Answer: Volatile memory loses its data when the power is turned off, while non-volatile memory retains data even when the power is off.

Question: Explain the working principle of a solar cell.

Answer: A solar cell converts light energy into electrical energy using the photovoltaic effect.

Question: What is the difference between a resistor and a capacitor?

Answer: A resistor opposes the flow of current, while a capacitor stores electrical energy and releases it when needed.

Question: What is the purpose of an antenna in communication systems?

Answer: An antenna transmits and receives electromagnetic waves, enabling wireless communication.

Question: Explain the use of a laser diode.

Answer: A laser diode emits a coherent beam of light used in applications like optical communication and laser pointers.

Question: What is the difference between a flip-flop and a latch?

Answer: A flip-flop is a digital memory circuit that stores data on the clock edge, while a latch stores data based on the input control signal.

Question: What is modulation in communication systems?

Answer: Modulation is the process of varying a carrier signal to transmit data over a communication medium.

Question: Explain the concept of multiplexing.

Answer: Multiplexing is a technique used to combine multiple signals into one for transmission over a single communication channel.

Question: What is the function of an analog-to-digital converter (ADC)?

Answer: An ADC converts an analog signal into a digital signal for processing in digital devices.