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Questions Related to physics

Multiple choice physics universe and space science launching of an artificial satellites around the earth launching of satellite india’s space programmes

If for a given angle of projection, the horizontal range is doubled, the time of flight becomes

  1. $4 times$

  2. $2 times$

  3. $\sqrt 2 \;times$

  4. $\frac{1}{{\sqrt 2 }}\;times$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
$r=\dfrac { { u }^{ 2 }\sin2\theta  }{ g } $
Hence $R=2r=\dfrac { { V }^{ 2 }2\sin2\theta  }{ g } $
${ u }^{ 2 }=\dfrac { { V }^{ 2 } }{ 2 } \Rightarrow V=\left[ { \left( 2 \right)  }^{ 1/2 } \right] 4$
$t=\dfrac { 2u\sin\theta  }{ g } $
$T=\dfrac { 2V\sin\theta  }{ g } $
    $=\dfrac { 2\times { 2 }^{ 1/2 }\times u\sin\theta  }{ g } $
    $=\left( { 2 }^{ 1/2 } \right) t$
    $={ \left( 2 \right)  }^{ 1/2 }$
    $=\sqrt { 2 } $ times
Multiple choice physics universe and space science launching of an artificial satellites around the earth launching of satellite india’s space programmes

Two identical satellites are moving in the same circular orbit around the earth but in opposite senses of rotation, Assuming an inelastic collision to take place, so that the wreckage remains as one piece of tangled material  wreckage

  1. will be moving in a circular orbit of half the radius

  2. will be moving in a circular orbit on one fourth the radius

  3. will spin with no translatory motion

  4. falls directly down
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The wreckage will spin with no translatory motion$.$

Hence,
option $(C)$ is correct answer.  

Multiple choice physics universe and space science launching of an artificial satellites around the earth launching of satellite india’s space programmes

What should be done to successfully convert the format of an image from BMP to JPEG ?

  1. Compress the file

  2. Rename the image

  3. Use the save as command

  4. Change the image file extension
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Open paint and then open your BMP file, Next click on file and then save as. In newer version of paint that have the ribbon interface click on the title menu icon, in the Save As type dropdown choose the JPEG as the file format.

Multiple choice physics universe and space science launching of an artificial satellites around the earth launching of satellite india’s space programmes

Geo stationary satelites revolves at:

  1. Any height

  2. Fixed height

  3. Height above pole

  4. height which depends upon its mass
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Geo stationary satellite revolves at fixed height. A Geo stationary satellite is an earth orbiting satellite which is placed at an altitude of approximately 35,800 kms directly over the equator, that revolves in the same direction the earth rotates.

Multiple choice physics universe and space science launching of an artificial satellites around the earth launching of satellite india’s space programmes

Validation of programs is used to check that data is

  1. In right format

  2. Of right type

  3. Within possible value ranges

  4. All of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Data validation is a process of ensuring data have undergone data cleansing to ensure they have data quality i.e they are both correct and useful. Apart from data cleansing the data must be within possible value range that ensures smooth and effective functioning of the space satellite. Hence all the three option are correct.

Multiple choice physics universe and space science launching of an artificial satellites around the earth launching of satellite india’s space programmes

Why would a switch be used in a network in preference to a HUB ?

  1. To reduce the network traffic

  2. To prevent the spread of all viruses

  3. To connect a computer directly to the internet

  4. To manage password security at the work station
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A switch can be used in a network in preference to HUB because a switch helps far better than a HUB to reduce the network traffic.

Multiple choice physics universe and space science launching of an artificial satellites around the earth launching of satellite india’s space programmes

Equipment and programs used to process raw data into information are called

  1. Information

  2. Information technology

  3. Information processes

  4. Raw data
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Information technology is the study of the use of computers to store, retrieve, transmit and manipulate data(or information). It is considered to be a subset of Information and Communication Technology(ICT).

Multiple choice physics free, damped and forced oscillations melde's experiment free, forced and damped oscillations sonometer and laws of transverse vibrations

In Melde's experiment, eight loops are formed with a tension of $0.75\space N$. If the tension is increased to four times then the number of loops produces will be

  1. $2$

  2. $4$

  3. $8$

  4. $16$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

$Tp^2=constant$
$T _1P _1^2=T _2p _2^2$
$\dfrac{T _2}{T _1}=\dfrac{p _1^2}{p _2^2}$
$\Rightarrow \dfrac{p _1^2}{p _2^2}=4\Rightarrow p _2^2=\dfrac{p _1^2}{4}$
$\Rightarrow p _2^2=\dfrac{64}{4}=16$
$\Rightarrow p _2=4$

Multiple choice physics free, damped and forced oscillations melde's experiment free, forced and damped oscillations sonometer and laws of transverse vibrations

Periodic vibrations of decreasing amplitude are called

  1. Over Vibrations

  2. Critical Vibrations

  3. Damped Vibrations

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Damped vibrations occur when an oscillating system loses energy over time due to resistive forces like friction or air resistance, causing the amplitude to decrease.