Recent questions without a selected answer

Sketch signals given by following equations : 1. x(t) = u(t) - u(t-1) 2. x(t) = δ(t+1) - δ(t-1)
Answer : --- ## **Understanding the Functions** Before sketching, you need to understand two basic functions: ### 1. **Unit Step Function \( u(t) \):** - **What is it?** The unit step function ... - For **impulse functions**, focus on where the spikes occur and whether they are positive or negative. ---...

Define the following ratings of a motor: (i) Horsepower rating (ii) Short-time rating
Answer : (i) **Horsepower rating**: The horsepower rating of a motor refers to the maximum power output that the motor can deliver continuously without overheating under standard operating conditions. It is a ... used when the motor is expected to operate for brief periods and then allowed to cool down....

A motor has to exert power starting from zero and rising uniformly to 150 HP in 8 mins after which it works at constant power of 100 HP for 5 mins. The motor remains on no load for next 5 mins. The cycle again starts and repeats indefinitely. Determine suitable size of motor.
Answer : --- ### What We Need to Do: We need to find the **equivalent power** of the motor. This is the steady power that the motor would need to operate continuously, while doing the same total work as in the cycle described. ... }. \] --- ### Final Answer: The motor should have a size of **61.1 HP**....

What is light?
Answer : Light is a type of energy that travels in waves and allows us to see the world around us. It's a form of energy called electromagnetic radiation. Here's what you need to know: 1. **How Light ... light is energy that lets us see and understand the world around us. It's essential for life on Earth!...

explain electricity in simple terms.
Answer : Electricity is the flow of tiny particles called electrons. These particles move through materials to carry energy, and this movement powers many things we use every day, like lights, phones, ... s essential for modern life, and understanding its basics helps us appreciate the technology around us....

What is XOR called?
Answer : XOR, short for **"exclusive OR"**, is a logical operation used in mathematics and computer science, particularly in Boolean algebra. It is a type of binary operation that operates on two inputs ... returning true only when exactly one input is true, making it distinct from the regular OR operation....

Is a thyristor active or passive?
Answer : A **thyristor** is classified as an **active component** in electronics. ### Explanation: - **Active components** are those that can amplify or control the flow of electrical current. They usually ... its reliance on an external power source for operation, a thyristor is an **active component**....

What does quantum explain?
Answer : Quantum mechanics, often simply called "quantum," is a fundamental branch of physics that explains the behavior of matter and energy at the smallest scales-such as atoms, ... It has both profound theoretical implications and practical applications that have revolutionized science and technology....

How to calculate rpm using Hall effect sensor?
Answer : Calculating RPM (revolutions per minute) using a Hall Effect sensor involves several steps. The Hall Effect sensor is used to detect the magnetic field from a rotating object, ... sensor for various applications like motor speed measurement, vehicle speedometers, or industrial machinery monitoring....

What is the law of diode?
Answer : The **law of the diode**, often referred to as the **diode equation** or **Shockley diode equation**, describes the relationship between the current through a diode and the voltage ... how diodes work in circuits, including rectifiers, voltage regulators, and light-emitting diodes (LEDs)....

Why is it called tunnel diode?
Answer : The term **"tunnel diode"** originates from its unique operating principle, which involves a quantum mechanical effect known as **tunneling**. This effect is a key feature that distinguishes the ... classically. The phenomenon is what gives the tunnel diode its name and its special properties....

Why is thermocouple used?
Answer : A thermocouple is used to measure temperature by converting thermal energy into electrical energy. It operates based on the **Seebeck effect**, a phenomenon where a voltage (or electromotive ... a thermocouple depends on the specific temperature range and accuracy required for the task at hand....

What is de Broglie hypothesis of?
Answer : The **de Broglie hypothesis**, proposed by French physicist **Louis de Broglie** in 1924, is a fundamental concept in quantum mechanics that bridges the gap between wave and particle ... paving the way for the development of quantum theory and technologies that rely on quantum phenomena....

What is antireflection coating? Deduce an expression for the minimum thickness of the antireflection coating.
Answer : ### **What is Antireflection Coating?** Antireflection coating is a thin layer of material applied to the surface of lenses, screens, or glass to reduce the reflection of light. This helps more ... and solar panels. This explanation and formula will ensure you get full marks for the answer!...

Explain Semiconductor.
Answer : ### Semiconductor Notes **Definition**: A semiconductor is a material with electrical conductivity between that of a conductor (like copper) and an insulator (like glass). Semiconductors ... and efficiency of devices used in all aspects of technology from computing to renewable energy solutions....

Combinational Circuits in Digital Electronics
Answer : ### Combinational Circuits in Digital Electronics **Definition:** Combinational circuits are a type of digital logic circuit whose output depends only on the present input values, not on ... and designing combinational circuits, one can perform a wide range of digital logic functions efficiently....

Smart Grid Market
Answer : The Smart Grid market refers to the industry that is focused on developing and implementing advanced electricity networks, known as smart grids. These grids use digital technology to improve the ... , and consume electricity, ensuring a cleaner, more efficient, and more reliable energy future....

Why is Zener diode doped?
Answer : A Zener diode is heavily doped to create a narrow depletion region, which is essential for its operation in the breakdown region. This heavy doping allows the Zener diode to achieve a ... levels in circuits, making it an important component in power supplies and voltage regulation applications....

What is the time constant for series RL and RC circuits?
Answer : The time constant (\(\tau\)) is a crucial parameter in analyzing transient responses in RL and RC circuits. It determines how quickly the circuit responds to changes, such as when a voltage or ... , the larger the time constant, the slower the circuit's response to changes in voltage or current....

What is the SI unit of electric flux?
Answer : The SI unit of electric flux is the **volt meter** (V·m), or equivalently, **newton meter squared per coulomb** (N·m²/C)....