281. Indian Institute of Remote Sensing is situated-

1. In Ahmedabad
2. In Dehradun
3. In Sriharikota
4. None of the above

Option “2” is correct.
Indian Institute of Remote Sensing is situated in Dehradun.
282. What is the minimum distance (in meters) required to hear an echo?

1. 10
2. 13
3. 17
4. 21

Option “3” is correct.
Echo is a reflection of sound that arrives at the listener with a delay after the direct sound.The reflecting object must be more than 17m from the sound source for echo to be perceived by a person located at the source.
283. Why does a Black board appears black in colour?

1. It reflects black colour
2. It absorbs black colour
3. It reflects all colours
4. It absorbs all the colours

Option “4” is correct.
A black board appears black because it absorbs all the colors of white light and reflects none.
284. Which of the following instrument is used to measure Soil Water Tension?

1. Photometer
2. Pyrometer
3. Psychrometer
4. Tensiometer

Option “4” is correct.
A tensiometer in soil science is a measuring instrument used to determine the Soil water tension.Such tensiometers are used in irrigation scheduling to help farmers and other irrigation managers to determine when to water. It can also be used in the scientific study of soils and plants.
285. What is the SI unit of Force?

1. Pascal
2. Boyle
3. Newton
4. Watt

Option “3” is correct.
The SI unit of Force is Newton. One Newton is equal to 1 kilogram meter per second squared.
286. Which one of the following is a bad Thermal Conductor?

1. Aluminum
2. Copper
3. Glass
4. Silver

Option “3” is correct.
Glass is bad thermal conductor and is a good insulator.It has tightly held electrons which did not allow heat to flow through it.
287. Who invented first working laser?

1. A. H. Taylor
2. W. K. Roentgen
3. T. H. Mailman
4. Fred Morrison

Option “3” is correct.
LASER (LIGHT AMPLIFICATION BY STIMULATED EMMISSION OF RADIATION)is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The first laser was built in 1960 by Theodore H. Maiman.
288. In the absence of the earth’s atmosphere, sky would appear-

1. Blue
2. Deep red
3. White
4. Black

Option “4” is correct.
In absence of earth’s atmosphere, sky would appear black due to absence of scattering phenomena.
289. Temperature of distant luminous bodies can be determined by –

1. Mercury thermometers
2. Gas thermometers
3. Pyrometers
4. Colour thermometers

Option “3” is correct.
Temperature of distant luminous bodies can be determined by Pyrometers.
290. Energy travels from Sun to Earth through –

1. Conduction
2. Convection
3. Radiation
4. Modulation

Option “3” is correct.
Energy travels from Sun to Earth through Radiation.
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