471. Electroscope was invented by –

1. William Gilbert
2. Alfred Nobel
3. Joseph Nicephore Niepce
4. Ted Nelson

Option “1” is correct.
An electroscope is an early scientific instrument that is used to detect the presence and magnitude of electric charge on a body. It was the first electrical measuring instrument. The first electroscope, a pivoted needle called the versorium, was invented by British physician William Gilbert around 1600.
472. The light with the shortest wavelength is-

1. Red
2. Yellow
3. Blue
4. Violet

Option “4” is correct.
Wavelength of red colour is largest and violet colour has the shortest wavelength.
473. Sewing machine was first patented by –

1. Alfred P. Southwick
2. Elias Howe
3. Murasaki Shikibu
4. Hanaoka Seishu

Option “2” is correct.
On September 10, 1846, Elias Howe was granted a US patent for his invention of the sewing machine.
474. What is impulse equal to?

1. Change in momentum
2. Change in force
3. Change in velocity
4. Change in acceleration

Option “1” is correct.
The impulse-momentum theorem states that the change in momentum of an object equals the impulse applied to it.
475. ISRO built India’s first satellite known as _____.

1. Aryabhatta
2. Bhaskara
3. Rohini
4. Insat 1A

Option “1” is correct.
ISRO built India’s first satellite known as Aryabhata.
476. In a projectile motion, a large angle with the horizontal produces ______.

1. Flat trajectory
2. Curve trajectory
3. Straight trajectory
4. High trajectory

Option “4” is correct.
In a projectile motion, a large angle with the horizontal produces high trajectory.
477. A device which converts electrical energy into mechanical energy is-

1. Dynamo
2. Transformer
3. Electric motor
4. Inductor

Option “3” is correct.
Electric motor is a device which converts electrical energy into mechanical energy. Electric motors involve rotating coils of wire which are driven by the magnetic force exerted by a magnetic field or an electric current.
478. Which one of the following is not correctly matched?

1. Knot – Unit to Measure speed of ship
2. Nautical mile – Unit of distance used in navigation
3. Angstrom – Unit of length
4. Light year – Unit of measuring time

Option “4” is correct.
Light year is not a unit of measuring time, but a unit of measuring distance. The remaining pairs are correctly matched.
479. Which one of the following is not the unit of heat?

1. Calorie
2. Kilocalorie
3. Kilojoule
4. Watt

Option “4” is correct.
The watt is a derived unit of power in the International System of Units (SI). Rest of all are the units of heat.
480. The technique used to transmit audio signals in television broadcast is-

1. Amplitude modulation
2. Pulse code modulation
3. Frequency modulation
4. Time dimension multiplication

Option “3” is correct.
Television broadcasts emit two types of signals, audio and visual. These two signals require modulation to transmit both signals at the same time. Analog television requires transmission that uses specific modulation methods employing AM and FM signals in its transmission. Frequency modulation or FM is used for the audio part of the transmission. Amplitude modulation or AM is used in the video transmission.
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

68 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

  52. JamesHat

    ¡Saludos, apostadores entusiastas !
    casinosextranjero.es – juega desde el extranjero – п»їhttps://casinosextranjero.es/ п»їcasinos online extranjeros
    ¡Que vivas increíbles recompensas sorprendentes !

  54. quantkiolanthe

    Why It’s Collectable Tudor quietly dabbles in link making watches with logo-dialed watches for companies. These Air France editions are two of only a handful and they’re executed very well. It’s not a very “Rolex” practice to create limited editions today but Tudor has been active in this space making these watches highly sought-after by collectors.

  55. ramyadvictoria

    Malaika My style is 50 percent girl in link her late teens trying to get into a bar 25 percent eight-year-old boy in overalls 25 percent aspirational adult. Style-wise this is the watch for the adult in me.

  57. thadeawbonnie

    Believe it or not there is a method to the madness of this column link and the ordering of every week’s picks factors into it. Sometimes it’s fun to build up to something big and sign off for the week with a bang but other times the proverbial big kahuna is so good that you can’t help but spill the beans early. This week I thought I’d come right out of the gate with what’s undoubtedly one of the most impressive watches to be offered this year. And no it’s not a Rolex or a Patek.

  58. alysaxhadley

    All of a sudden everybody knows what a Crash is and slowly people are learning about other B-side hits from link the watchmaker of shapes. “The entire Cartier vintage history is so ripe for the plucking” watch dealer and Internet personality Mike Nouveau astutely pointed out. “There’s so much cool stuff to pick from their back catalog that they maybe made 10 of and that’s it.”

  63. Kennethdyeta

    ¡Saludos, exploradores de la fortuna !
    Casinos extranjeros con bonos sin depГіsito inicial – п»їhttps://casinoextranjerosdeespana.es/ casino online extranjero
    ¡Que experimentes maravillosas premios excepcionales !

  64. Waltersoaxy

    Hello keepers of pristine spaces !
    Best Air Purifier for Smoke Large Rooms – Top 10 List – п»їhttps://bestairpurifierforcigarettesmoke.guru/ air purifier for smoke smell
    May you experience remarkable magnificent freshness !

  67. DanielSlUrf

    ¡Saludos, buscadores de tesoros escondidos !
    Casino sin licencia EspaГ±a con privacidad total – п»їemausong.es mejores casinos sin licencia en espaГ±a
    ¡Que disfrutes de increíbles giros exitosos !

Leave a Comment

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

Scroll to Top