481. The Dynamo-

1. Converts electric energy into mechanical energy
2. Converts chemical energy into electric energy
3. Converts mechanical energy into electrical energy
4. Converts electrical every into chemical energy

Option “3” is correct.
A dynamo is an electrical generator that produces direct current with the use of a commutator. It converts mechanical energy into electrical energy.
482. Transformer is used for-

1. Converting AC into DC
2. Converting DC into AC
3. To step up DC voltages
4. To step up or step down AC voltages

Option “4” is correct.
The transformer is used to step up and step down the alternating current. There are two types of coils in transformers (i) Primary coil (2) Secondary coil. Alternate current flows through the primary coil which inflicts the potential in the secondary coil.
483. A ball rolling along the ground gradually slows down and finally comes to rest is due to ________.

1. Friction
2. Magnetic force
3. Electrostatic force
4. Muscular force

Option “1” is correct.
A ball rolling along the ground gradually slows down and finally comes to rest is due to friction.
484. The angle between the __________and the incident ray is called the angle of incidence.

1. Surface
2. Normal
3. Tangent
4. Reflected ray

Option “2” is correct.
The angle between the Normal and the incident ray is called the angle of incidence.
485. Who invented the thermos flask?

1. Ray Tomlinson
2. Tim Berners-Lee
3. William Cullen
4. James Dewar

Option “4” is correct.
James Dewar was inventor of the thermos flask.
486. Friction is caused by the ______________ on the two surfaces in contact.

1. Roughness
2. Smoothness
3. Densities
4. Gaps

Option “1” is correct.
friction was caused due to the roughness of the two surfaces in contact with each other
487. Sun appears red in colour at sunrise and sunset due to –

1. The fact that sun emits only red colour at that time
2. Red light having longer wave length scatters away
3. That sun comes out of the mountains
4. That all other colours scatter away except red

Option “4” is correct.
During sunrise and sunset, the rays have to travel a larger part of the atmosphere because they are very close to the horizon. Therefore, light other than red is mostly scattered away. Most of the red light, which is the least scattered, enters our eyes. Hence, the sun and the sky appear red.
488. At hill stations, the boiling point of water will be –

1. Same as at sea level
2. less than that at sea level
3. more than that at sea level
4. Equal to the melting point of ice

Option “2” is correct.
At hill stations, the boiling point of water will be less than that at sea level due to change in atmospheric pressure.
489. The component used for tuning a radio is basically a variable ___________.

1. Resistor
2. Capacitor
3. Rectifier
4. Transformer

Option “1” is correct.
The component used for tuning a radio is basically a variable capacitor.
490. 0°K is equivalent to –

1. 273°C
2. – 273°C
3. 0°C
4. 100°C

Option “2” is correct.
0°K is equivalent to – 273°C.
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

73 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 !

  69. yalanni1997

    Ghesquière has been the link artistic director of Vuitton womenswear since 2014. Working at Vuitton puts one in the very heart of French luxury although I maintain the opinion that it’s hard for most people to actually picture Louis Vuitton clothing. There is such a heavy association and weight on the iconic monogrammed leather goods it feels impossible to dissociate. Much like Bulgari will likely always be Serpenti and Monete to me.

  72. zabina1998

    When I think about Grand Seiko the two things that come to mind are snowflakes and link white birch natural elements that remind me of home. When I return to New York City from the northwoods of Wisconsin I inevitably get nostalgic for the trappings of wilderness among them a nice snowy landscape like the beautiful stand of trees outside my parents back door.

  73. obeliayyanis

    What is new is the green colorway for the link steel model along with the choice of a steel bracelet or a green rubber strap and of course the gem-set model and its meteorite dial. That said green isn’t entirely brand-new as we saw a similar coloring for a boutique-only edition made in collaboration with Aaron Rodgers last year. Where that model broke the mold with both color and Arabic numerals these new green models retain the standard model’s baton hour markers.

Leave a Comment

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

Scroll to Top