Understanding Renewable Energy and Solar Cells
30 Questions
3 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary classification of energy?

  • Geothermal and Biomass
  • Renewable and Organic
  • Fossil and Non-fossil
  • Renewable and Non-renewable (correct)

What is a characteristic of renewable energy?

  • Limited in quantity
  • Accessible in abundance (correct)
  • Depletes in 50 years
  • Harmful to the atmosphere

What is a source of renewable energy?

  • Natural Gas
  • Oil
  • Coal
  • Wind (correct)

What is a characteristic of non-renewable energy?

<p>Derived from limited-quantity sources (B)</p> Signup and view all the answers

What is an example of non-renewable energy?

<p>Fossil fuels (C)</p> Signup and view all the answers

Why is cost a significant challenge in the growth of solar cells?

<p>Due to the high production cost (A)</p> Signup and view all the answers

What happens to the concentration of holes on the p-type side as the concentration of electrons on the n-type side rises?

<p>It rises (C)</p> Signup and view all the answers

What is the term used to describe the voltage generated by the p-n junction?

<p>Photovoltage (D)</p> Signup and view all the answers

What causes the molecules in the core to migrate?

<p>The continually changing flow direction of the alternating current (C)</p> Signup and view all the answers

What is the result of the molecules colliding with each other during their movement?

<p>Friction and heat (C)</p> Signup and view all the answers

What is the primary material used in the manufacturing of solar cells and microchip transistors?

<p>Silicon (D)</p> Signup and view all the answers

What is the characteristic of a semiconductor material like silicon?

<p>It can be made to conduct electricity under certain conditions (C)</p> Signup and view all the answers

What is the term for the energy loss induced by the friction of molecules in the core?

<p>Hysteresis loss (B)</p> Signup and view all the answers

What is the term used to describe the lower layer of silicon in a solar cell, which has a small number of electrons?

<p>p-type silicon (D)</p> Signup and view all the answers

What is the response of certain solid materials to applied mechanical stress?

<p>Electric charge accumulation (A)</p> Signup and view all the answers

What is the structure of a solar cell composed of?

<p>Two layers of silicon (D)</p> Signup and view all the answers

What is the meaning of the word 'piezoelectricity'?

<p>Electricity from pressure (A)</p> Signup and view all the answers

Which of the following materials is capable of exhibiting piezoelectricity?

<p>Crystals (D)</p> Signup and view all the answers

What is a major limitation of piezoelectric generators in terms of power applications?

<p>They produce limited power, making them unsuitable for high-power applications (C)</p> Signup and view all the answers

What factor influences the efficiency of energy conversion in piezoelectric generators?

<p>The frequency and amplitude of the mechanical vibrations (D)</p> Signup and view all the answers

At what frequency do piezoelectric generators operate most efficiently?

<p>A specific frequency that matches their resonant frequency (D)</p> Signup and view all the answers

What is the focus of ongoing research in piezoelectric generators?

<p>Improving their efficiency and scalability (A)</p> Signup and view all the answers

What is a potential future application of piezoelectric generators?

<p>Powering small electronic devices in remote or hard-to-reach locations (C)</p> Signup and view all the answers

What is essential for optimizing the performance of piezoelectric generators and exploring new possibilities in energy harvesting and electronic systems?

<p>Understanding the principles and applications of piezoelectric generators (B)</p> Signup and view all the answers

What happens to the potential barrier across the semiconductor when the Fermi energy of metal becomes lower than the Fermi energy in the semiconductor?

<p>It reduces (C)</p> Signup and view all the answers

What is the direction of the current generated across the MS junction when the applied voltage is increased?

<p>Positive (D)</p> Signup and view all the answers

What happens to the depletion region when the applied voltage is continuously increased?

<p>It becomes very thin and finally disappears (C)</p> Signup and view all the answers

What is the effect of forward biasing on the flow of electrons across the MS junction?

<p>It increases the flow of electrons (C)</p> Signup and view all the answers

Why do more electrons diffuse from the semiconductor towards the metal than the electrons drifting into the semiconductor in forward biasing?

<p>Because the potential barrier is reduced (B)</p> Signup and view all the answers

What is the condition for reverse biasing in an MS junction?

<p>VA &lt; 0 (D)</p> Signup and view all the answers

More Like This

Solar Energy Advantages Quiz
10 questions
Photovoltaic Cells and Solar Energy
25 questions
Use Quizgecko on...
Browser
Browser