441. Sea seems blue due to-

1. Excess deepness
2. Reflection of sky and scattering of light by the drops of water
3. Blue colour of water
4. Upper layer of water

Option “2” is correct.
“The ocean looks blue because red, orange and yellow (long wavelength light) are absorbed more strongly by water than is blue (short wavelength light). So when white light from the sun enters the ocean, it is mostly the blue that gets returned.
442. Who invented PlayStation?

1. Wright brothers
2. Reynold B. Johnson
3. Assen Jordanoff
4. Ken Kutaragi

Option “4” is correct.
PlayStation was the brainchild of Ken Kutaragi, a Sony executive who had just finished managing one of the company’s hardware engineering divisions at that time and would later be dubbed as “The Father of the PlayStation”.
443. Instrument for measuring light intensity is called-

1. Lucimeter
2. Cryometer
3. Cyanometer
4. Barometer

Option “1” is correct.
Lucimeter is an instrument used for measuring light intensity.
444. Which one among the following is not an electro-magnetic wave?

1. X-Ray
2. Radio waves
3. Cathode Ray
4. Infrared Ray

Option “3” is correct.
Electromagnetic radiation refers to the waves of the electromagnetic field, propagating through space-time, carrying electromagnetic radiant energy. It includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
445. Which one of the following is a good electrical conductor?

1. Graphite
2. Diamond
3. Peat
4. Charcoal

Option “1” is correct.
Graphite is a very good conductor of electricity due to the mobility of the electrons in its outer valence shells.
446. Which of the following pair is incorrect?

1. Hygrometer – Water vapour content of the atmosphere
2. Lactometer – Specific gravity of liquids
3. Anemometer – Speed of the wind
4. Seismograph – Earthquakes

Option “2” is correct.
A lactometer is an instrument used to check purity of milk.
447. If a body is moving on a circular path, what is its average velocity if it completes one cycle in one second?

1. Average velocity depends upon time taken to complete one cycle
2. One
3. Zero
4. Average velocity is same as average speed

Option “3” is correct.
Average velocity= Displacement/Total time taken
since displacement=0
so average velocity=0
448. Why does a fountain pen leak in aeroplane flying at a height?

1. Because of reduced viscosity of the ink in the pen
2. Because of increased viscosity of the ink in the pen
3. Because of higher atmospheric pressure outside the pen
4. Because of lower atmospheric pressure outside the pen

Option “4” is correct.
The atmospheric pressure decreases with altitude because gas molecules which make up the air concentrate near lower altitude in response to Earth’s gravity. Hence, air pressure is low at higher altitudes. Due to this difference in air pressure, the air inside the pen forces the ink to come out.
449. Instrument for measuring wind velocity is called –

1. Coulombmeter
2. Anemometer
3. Cyanometer
4. Chronometer

Option “2” is correct.
An anemometer is a device used for measuring the speed of wind.
450. Who was the first Indian astronaut to travel in space?

1. Rakesh Sharma
2. Ravish Malhotra
3. Kalpana Chawla
4. Sheikh Muszaphar Shukor

Option “1” is correct.
Rakesh Sharma was the first Indian to travel in Space. He was born on 13th January 1949 in Punjab, India. He flew to the Salyut 7 Space Station.
Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

17 thoughts on “Physics”

  8. Dolly.

    Hi I’m dolly..
    Jo bhi lok ye app download krk pdhai krr kre hai vo unka future boht hi jyada bright hone vala hai.. because baat free off cost prhne ki nahi hai,baat kaise study krne ki hai…fhir chahe vo jaise bhi ho…main sbko bss itna hi kehna chahti hu ke boh ache se iss app ka use kro and kisi bhi competitive exam ke liye ye app boht acha hai…and please comment jrur chod ke jna .. thank you

  10. lista escape roomów

    hey there and thank you for your info – I’ve certainly picked up something
    new from right here. I did however expertise several technical points using this website, as I experienced
    to reload the website lots of times previous to I could
    get it to load correctly. I had been wondering if your hosting is OK?
    Not that I am complaining, but sluggish loading instances times will very frequently affect your
    placement in google and can damage your high quality score if advertising and marketing
    with Adwords. Anyway I am adding this RSS to my e-mail and can look out for much more of your respective intriguing content.
    Make sure you update this again soon.. Escape rooms hub

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top