Tag: physics

Questions Related to physics

Scientists have found a way to develop camouflaging skin inspired by which species? 

  1. Octopus

  2. Cuttlefish

  3. Chameleon

  4. Only A and B


Correct Option: D

Scientists have developed the first plant based vaccine to combat which virus?

  1. Swine flu

  2. Avian flu

  3. HIV-AIDS

  4. Zika


Correct Option: D

Which is the first law university in India?

  1. Al-Ameen College of law

  2. Alliance School of law

  3. R.K Law college

  4. National Law School of India


Correct Option: D
Explanation:

The National Law School of India University is a public law school located in Bangalore, Karnataka is the first national law university established in India.

Which is the largest open university in India?

  1. Indira Gandhi National Open University

  2. Dr. B.R. Ambedkar Open University

  3. Nalanda Open University

  4. Yashwantrao Chavan Maharashtra Open University


Correct Option: A
Explanation:

Indira Gandhi National Open University is the largest open university in India.

$2$ December $1942$ is known for.

  1. The formation of the Big Bang theory

  2. The activation of the first operational nuclear reactor

  3. The creation of the first controlled chain reaction

  4. The development of the first thermonuclear device


Correct Option: C
Explanation:

The world's first nuclear reaction, Chicago Pile-1 reached the stage of criticabty (ready for activation) on Dec'2 1942. The creation of 1st controlled chain reaction done on this day.

Which is the first open university in India?

  1. Andhra Pradesh Open University

  2. Yashwantrao Chavan Maharashtra Open University

  3. Indira Gandhi National Open University

  4. Nalanda Open University


Correct Option: A
Explanation:

Andhra Pradesh Government took the first initiative in 1982, to start the Andhra Pradesh Open University (now renamed Dr. BR Ambedkar Open University) at Hyderabad

Which is the first women's university in India?

  1. SNDT

  2. Mother Teresa Women's University

  3. Avinashilingam University for women

  4. SPMVV


Correct Option: A
Explanation:

T he Shreemati Nathibai Damodar Thackersey University, formerly known as the Indian women’s university, was India’s first women’s college.

Who enunciated the principle of equipartition of energy?

  1. Ludwig Bolizmann

  2. Joseph Stefan

  3. Sir James Hopwood Jeans

  4. James Prescott Joule


Correct Option: A

He introduced a triatomic theory of colour vision, was the first to observe ocular astigmatism, he proved that the accommodation of eye was affected by change of curvature of the crystalline lens, but most famour for his discovery of interference of light and for developing the wave theory of light. Who was this physician-cum-physicist?

  1. Augustin Jean F. Fresnel

  2. Humphrey Lloyd

  3. Christiaan Huygens

  4. Thomas Young


Correct Option: D
Explanation:

The triatomic theory of colour vision. The interference of light and for developing the wave theory of light. The physician -cum-physicist was Thomas Young.

An object is placed at a distance of 1.5 m from a screen and a convex lens is interposed between them. The magnification produced is 4. The focal length of the lens is then

  1. 1 m

  2. 0.5 m

  3. 0.24 m

  4. 2 m


Correct Option: C
Explanation:

Here, $m =\dfrac{v}{u} =-4$

$\Rightarrow u = \dfrac{-v}{4}$------------(1)

Also, $|u| + |v| = 1.5$

$\dfrac{v}{4} + v = 1.5$

$\Rightarrow \dfrac{(v+4 v)}{4} = 1.5$

 $\Rightarrow  v = 1.2 m$

So, putting the value of $v$ in equation (1):
 $u= \dfrac{-1.2}{4} = -0.3 m\,\,\,$

$\therefore  f =\dfrac{uv}{u-v}$

$\Rightarrow f=\dfrac{(-0.3 \times 1.2)}{(-0.3 - 1.2)} = 0.24m$
Hence the correct option is $(C)$