ECE Subjects

1. Kirchhoff's Current Law (KCL) states that: a) The sum of currents entering a node equals the sum leaving it b) The sum of all voltages around a loop equals zero c) Current in a series circuit is the same through each component d) Voltage across components in parallel is the same Click to View […]

1. Shannon's Entropy measures: a) The bandwidth of a communication channel b) The error rate in data transmission c) The average amount of information produced by a stochastic source of data d) The capacity of a storage device Click to View Answer and Explanation Answer: c) The average amount of information produced by a stochastic

1. Optical fibers primarily use which principle to transmit light? a) Reflection b) Refraction c) Total internal reflection d) Diffraction Click to View Answer and Explanation Answer: c) Total internal reflection Explanation: Optical fibers transmit light based on the principle of total internal reflection, where light is confined within the core of the fiber due

1. The primary advantage of wireless communication over wired communication is: a) Higher data transfer speeds b) Greater security c) Mobility and flexibility d) Lower cost Click to View Answer and Explanation Answer: c) Mobility and flexibility Explanation: The primary advantage of wireless communication is the mobility and flexibility it offers, as it allows users

1. In digital communication, 'bit rate' is defined as: a) The duration of each bit b) The number of bits transmitted per second c) The number of errors in transmitted bits d) The bandwidth of the digital signal Click to View Answer and Explanation Answer: b) The number of bits transmitted per second Explanation: Bit

1. The main function of an antenna in a radio receiver is to: a) Amplify the radio signal b) Convert radio waves into electrical signals c) Filter out unwanted frequencies d) Supply power to the receiver Click to View Answer and Explanation Answer: b) Convert radio waves into electrical signals Explanation: The antenna's primary function

1. Microwave frequencies typically range from: a) 30 kHz to 300 MHz b) 300 MHz to 3 GHz c) 3 GHz to 30 GHz d) 30 GHz to 300 GHz Click to View Answer and Explanation Answer: c) 3 GHz to 30 GHz Explanation: Microwaves are a form of electromagnetic radiation with frequencies ranging from

1. A Diode is typically used in power electronics for: a) Voltage regulation b) Signal amplification c) Rectification d) Frequency modulation Click to View Answer and Explanation Answer: c) Rectification Explanation: In power electronics, a diode is primarily used for rectification, which is the process of converting alternating current (AC) to direct current (DC). 2.

1. Kirchhoff's Current Law (KCL) states that: a) The sum of currents entering a node equals the sum leaving it b) The sum of all voltages around a loop equals zero c) Current in a series circuit is the same through each component d) Voltage across components in parallel is the same Click to View

1. Silicon is widely used in electronics because of its: a) Magnetic properties b) Insulating properties c) Semiconductor properties d) Superconducting properties Click to View Answer and Explanation Answer: c) Semiconductor properties Explanation: Silicon is widely used in the electronics industry due to its ideal semiconductor properties, allowing it to effectively conduct electricity under certain

1. The primary difference between a microprocessor and a microcontroller is: a) Clock speed b) Size of the device c) Microcontroller integrates a CPU with memory and peripherals d) Microprocessor is faster than microcontroller Click to View Answer and Explanation Answer: c) Microcontroller integrates a CPU with memory and peripherals Explanation: A microcontroller is an

1. A control system that does not require external feedback is called: a) Closed-loop control system b) Open-loop control system c) Feedback control system d) Feedforward control system Click to View Answer and Explanation Answer: b) Open-loop control system Explanation: An open-loop control system operates without the use of external feedback. It acts solely based

1. The main purpose of modulation in communication systems is to: a) Reduce the signal size b) Increase the signal frequency c) Allow the signal to be transmitted over long distances d) Decrease the bandwidth of the signal Click to View Answer and Explanation Answer: c) Allow the signal to be transmitted over long distances

1. Fourier Transform is used in signal processing to: a) Measure signal strength b) Filter unwanted frequencies c) Analyze the frequency content of signals d) Amplify weak signals Click to View Answer and Explanation Answer: c) Analyze the frequency content of signals Explanation: Fourier Transform is a mathematical technique used to transform a signal from

1. The basic component of an integrated circuit is: a) Diode b) Capacitor c) Transistor d) Resistor Click to View Answer and Explanation Answer: c) Transistor Explanation: The fundamental building block of an integrated circuit (IC) is the transistor, used for amplification and switching. 2. A diode primarily functions to: a) Amplify signals b) Allow

1. The basic unit of digital information is: a) Byte b) Bit c) Nibble d) Word Click to View Answer and Explanation Answer: b) Bit Explanation: The bit (binary digit) is the most basic unit of information in digital electronics and computing, representing a 0 or 1. 2. A flip-flop is a: a) Digital amplifier

1. The main difference between a BJT and a FET is: a) Type of material used b) Size and weight c) Current control vs Voltage control d) Power handling capabilities Click to View Answer and Explanation Answer: c) Current control vs Voltage control Explanation: The primary difference between Bipolar Junction Transistors (BJTs) and Field-Effect Transistors