Tag: evs

Questions Related to evs

Which of the following letters will be seen with some change in a plane mirror?

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. M

  2. T

  3. L

  4. W

Show answer
Correct Option: C
Explanation:

Reflection through a plane mirror causes lateral inversion to the image.

The letters, M, T and W are laterally symmetric. So, no change will be observed after these letters are reflected on a plane mirror. The letter, L is not laterally symmetric. So, it will undergo lateral inversion and the image will appear different from the object.

In the image formed by a plane mirror, the left of the object appears on the right and the right appears on the left. This is called lateral inversion.

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. True

  2. False

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Correct Option: A
Explanation:

Lateral inversion is a phenomenon in which the left side of object becomes right side of image and right side of object appears as left side of image.


Given statement is $True$.

While standing in front of a plane mirror, if you touch your ............ ear with the  right hand, it will be seen in the mirror that your right ear is touched with your ................ hand.

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. Right, left

  2. Left, left

  3. Right, right

  4. Left, right

Show answer
Correct Option: A,D
Explanation:

Right, Left or Left, Right both are correct,because thats the property of mirror.

A clock fixed on a wall shows time 04 : 25 : 37. Its image in a plane mirror shows :

evs magic with mirrors lateral inversion right or left reflection at plane surface

  1. 07 : 30 : 33

  2. 07 : 43 : 32

  3. 07 : 35 : 22

  4. 43 : 27 : 36

Show answer
Correct Option: C
Explanation:

After reflection,
Image of the hour hand will look like its pointing between 7 and 8.
Image of the minute hand will look like its pointing at 7.
Image of the hour hand will look like its pointing between 4 and 5.
So the time will appear to be $07 : 35 : 22$

Physical Research Laboratory (PRL) was founded by :

evs universe and space science human beings in space our pride - iii our scientist

  1. C V Raman

  2. Vikram Sarabhai

  3. J C Bose

  4. Homi J Bhabha

Show answer
Correct Option: B
Explanation:

Physical Research Laboratory (PRL) was founded by Vikram Sarabhai on 11 November, 1947. It is a national research institute for space and allied science which is supported by department of space. 

State whether the given statement is True or False :

Vikram A. Sarabhai is considered as a main personality behind the launching of India's first satellite "Aryabhatta". 

evs universe and space science human beings in space our pride - iii our scientist

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

The given statement is true.

Sarabhai had started a project for fabrication and launch of an Indian satellite and thus THE FIRST Indian satellite named Aryabhatta was launched in 1975.

Vikram Sarabhai Space Centre is located at :

evs universe and space science human beings in space our pride - iii our scientist

  1. Ahmedabad

  2. Pune

  3. Sriharikota

  4. Thiruvananthapuram

Show answer
Correct Option: D
Explanation:

It is located in Thiruvananthapuram in Kerala. The space centre had its beginning as the Thumba Equatorial Rocket Launching Station in 1962. It was then renamed after Dr. Vikram Sarabhai whomis known as Father of Indian space program.

Name the scientist who is widely known as the "father of India's space programme" :

evs universe and space science human beings in space our pride - iii our scientist

  1. C.V. Raman

  2. Dr. Vikram A. Sarabhai

  3. Homi J. Bhabha

  4. Satyendra Nath Bose

Show answer
Correct Option: B
Explanation:

Dr. Vikram A. Saranhai was an Indian scientist and innovator widely regarded as the father id India's space programme. He was awarded Padma Bhushan in 1956 and Padma Vibhushan in 1972.

Select the mismatched pair of organism and its mode of multiplication.

evs seed becomes plant introduction to reproduction vegetative reproduction budding, vegetative propagation and spore formation other modes of vegetative propagation the journey of seeds

  1. Organism - Agave, Oxalis; Mode of multiplication - Bulbils

  2. Organism - Amoeba, Paramecium; Mode of multiplication - Binary fission

  3. Organism - Chlamydomonas, Ulothrix; Mode of multiplication - Sporangiospores

  4. Organism - Adiantum ; Mode of multiplication - Adventitious buds present at leaf tips

Show answer
Correct Option: C
Explanation:

Sporangiospores are non-motile spores produced inside the sporangia. They are generally dispersed by wind and germinate to produce new mycelium (e.g., Rhizopus, Mucor, etc.) In Chlamydomonas and Ulothrix, zoospores are formed.

So, the correct answer is 'Organism - Chlamydomonas, Ulothrix; Mode of multiplication - Sporangiospores'.

Vegetative propagation is the term used for

evs seed becomes plant introduction to reproduction vegetative reproduction budding, vegetative propagation and spore formation other modes of vegetative propagation the journey of seeds

  1. Sexual reproduction in animals

  2. Sexual reproduction in plants

  3. Asexual reproduction in animals

  4. Asexual reproduction in plants

Show answer
Correct Option: D
Explanation:
Vegetative propagation (vegetative reproduction) is the formation of new plants from vegetative units such as buds, tubers, rhizomes, etc. This term is used for asexual reproduction in plants. Plants with reduced power of sexual reproduction, long dormant period of seed or poor viability are multiplied easily through vegetative propagation.
So, the correct answer is 'Asexual reproduction in plants'.