Tag: evs

Questions Related to evs

The pointed nails attached under the shoes of the mountaineers protect them from _____________.

a visit to mountain climbers and their story india: relief features relief features of india evs

  1. low pressure

  2. low tempereture

  3. slipping on the snow

  4. cold weather

Show answer
Correct Option: C

Who was the first Indian woman to climb the Mount Everest?

a visit to mountain climbers and their story india: relief features relief features of india evs

  1. Tenzing Sherpa

  2. Premlata Agarwal

  3. Santosh Yadav

  4. Bachendri Pal

Show answer
Correct Option: D

_____ is the first Indian woman to climb the Mt. Everest.

a visit to mountain climbers and their story india: relief features relief features of india evs

  1. Arunima Sinha

  2. Premlata Agarwal

  3. Bachendri Pal

  4. Malavath Purna

Show answer
Correct Option: C
Explanation:
  • Bachendri Pal became the first Indian woman to reach the summit of Mount Everest in 1984. 

A real image of a distant object is formed by a plano-convex lens on its principal axis. Spherical aberration

evs magic with mirrors introduction to light and mirror image formation by plane mirror light : reflection and refraction from plane surface

  1. is absent

  2. is smaller if the curved surface of the lens faces the object

  3. is smaller if the place surface of the lens faces the object

  4. is the same whichever side of the lens faces the object

Show answer
Correct Option: B

In case of reflection by a plane mirror, which of the following statement are not correct?

evs magic with mirrors introduction to light and mirror image formation by plane mirror light : reflection and refraction from plane surface

  1. It can never give real image

  2. It can never give inverted image

  3. It changes left into right

  4. It changes front into back

Show answer
Correct Option: A,B,D
Explanation:

In case of reflection an by a plane mirror, it does not give a real, inverted image and image never changes front into back.

An object is placed symmetrically between the two plane mirrors inclined at angle of $30^o$. Then the total number of images formed is:

evs magic with mirrors introduction to light and mirror image formation by plane mirror light : reflection and refraction from plane surface

  1. 12

  2. 2

  3. 11

  4. 15

Show answer
Correct Option: C
Explanation:

No. of image $ = \dfrac{ 360^{\circ}}{ \theta} – 1$

                                             $ = 12-1$
                                             $ = 11$

It is necessary to illuminate the bottom of a well by reflected solar beam when the light is incident at an angle of $\alpha = {40}^{\circ}$ to the vertical. At what angle $\beta$ to the horizontal should a plane mirror be placed?

evs magic with mirrors introduction to light and mirror image formation by plane mirror light : reflection and refraction from plane surface

  1. ${70}^{\circ}$

  2. ${20}^{\circ}$

  3. ${50}^{\circ}$

  4. ${40}^{\circ}$

Show answer
Correct Option: A

Which of the following is a reflector of light?

evs magic with mirrors introduction to light and mirror image formation by plane mirror light : reflection and refraction from plane surface

  1. Sun

  2. Moon

  3. Star

  4. Filament

Show answer
Correct Option: B
Explanation:

Moon does not have any light of its own, it reflects the light of the sun.

The inner most layer of anther is tapetum whose function is?

evs nutrition and its deficiency nutrients and foodstuffs introduction to nutrients nutrition and its need simple test for nutrients test for nutrients

  1. Dehiscence

  2. Mechanical

  3. Nutrition

  4. Protection

Show answer
Correct Option: C
Explanation:

The tapetal layer is of great physiological significance as all the food material entering into the sporogenous tissue diffuses through this layer. Ultimately the cells of tapetal layer disorganise. Thus, tapetum makes a nutritive layer for the developing microspores or pollen grains.

Biological particles survive in atmosphere for short period of time due to lack of ______________.

evs nutrition and its deficiency nutrients and foodstuffs introduction to nutrients nutrition and its need simple test for nutrients test for nutrients

  1. Dust particles

  2. Moisture

  3. Nutrients

  4. Smog

Show answer
Correct Option: C