Science Quiz 17

1. OLED displays can be fabricated on flexible plastic substrates. 
2. Roll-up displays embedded in clothing can be made using OLEDs. 
3. Transparent displays are possible using OLEDs. 

Select the correct answer using the code given below.

1. 'Photovoltaics' is a technology that generates electricity by direct conversion of light into electricity, while 'Solar Thermal' is a technology that utilizes the Sun's rays to generate heat which is further used in electricity generation process. 
2. Photovoltaics generates Alternating Current (AC), while Solar Thermal generates Direct Current (DC). 
3. India has manufacturing base for Solar Thermal technology, but not for photovoltaics. 

Which of the statements given above is/are correct?

1. Size of the sun at dusk 
2. Colour of the sun at dawn 
3. Moon being visible at dawn 
4. Twinkle of stars in the sky 
5. Polestar being visible in the sky 

Which of the above are optical illusions?

1. Dispersion 
2. Refraction 
3. Internal reflection 

Select the correct answer using the codes given below.

1. It will enable us to understand as to why elementary particles have mass. 
2. It will enable us in the near future to develop the technology of transferring matter from one point to another without traversing the physical space between them. 
3. It will enable us to create better fuels for nuclear fission. 

Select the correct answer using the codes given below.

What is/are the implication/implications of the creation of antimatter? 

1. It will make mineral prospecting and oil exploration easier and cheaper. 
2. It will help probe the possibility of the existence of stars and galaxies made of anti-matter. 
3. It will help understand the evolution of the universe. 

Select the correct answer using the codes given below:

1. It would be difficult to use a kerosene lamp 
2. One would not be able to use a straw to consume a soft drink 
3. The blotting paper would fail to function 
4. The big trees that we see around would not have grown on the Earth 

Which of the statements given above are correct?