Explore topic-wise InterviewSolutions in Current Affairs.

As velocity, v α\(\sqrt{1}/{ρ}\) , velocity of sound will be greater in hydrogen gas.

ultrasonic wave helps to find the ways of bats in dark.

Because solids are more elastic compared to air.

Correct answer is (c) zero

Sound requires a material medium for propation. Hence, velocity of sound in vacuum is zero.

20Hz to 20KHz.

Concept used:-

Trick to find cube root of a number.

Method and Calculation:-

 • Find the unit digit of cube root by looking at unit digit of given number.

For cube root of 941192, unit digit must be 8 (8³ is 512)

 • Find other digit(s) by ignoring the last three digits of number and looking at remaining digits.

729 < 941 < 1000 (729 and 1000 are cubes of 9 and 10, so remaining part of cube root will be 9)

Hence, 98 is our answer

Concept used:-

Trick to find cube root of a number.

Method and Calculation:-

 • Find the unit digit of cube root by looking at unit digit of given number.

For cube root of 50653, unit digit must be 7 (7³ is 343)

 • Find other digit(s) by ignoring the last three digits of number and looking at remaining digits.

27 < 50 < 64 (27 and 64 are cubes of 3 and 4, so remaining part of cube root will be 3)

Hence, 37 is our answer

(c) The Chief Election Commissioner

Concept:

|x| = x if x ≥  0 and |x| = -x , if x < 0

We say f(x) is continuous at x = a if \(\rm\lim _{x \rightarrow a^{-}} f(x)=\lim _{x \rightarrow a^{+}} f(x)=lim _{x \rightarrow a} f(x)\)

We say f(x) is differentiable at x = a if \(\rm\lim _{x \rightarrow a^{-}} f'(x)=\lim _{x \rightarrow a^{+}} f'(x)\)

Calculation:

Here,  f(x) = |x - 3|

f(x) = x - 3 when x - 3 ≥  0 ⇒ x ≥ 3

And f(x) = 3 - x when x - 3 < 0 ⇒ x < 3

For, x = 0, f(x) = 3 - x

Function is not changing at x = 0   (∵ function is linear)

So, f(x) is continuous at x = 0

Now, x = 0, f(x) = 3 - x

⇒ f'(x) = -1

f'(0^-) = -1 and f'(0⁺) = -1

So, f(x) is differentiable at x = 0

Given:

Smallest perfect number divisible by 6 and 12

Concept used:

LCM of the numbers

Calculation:

LCM of 6 and 12 is 12.

⇒ 12 × 1 = 12, 12 is not a perfect square

⇒ 12 × 2 = 24, 24 is not a perfect square

⇒ 12 × 3 = 36, 36 is a perfect square

∴ The smallest perfect square number divisible by 6 and 12 is 36.

Calculation:

8 = 2 × 2 × 2

10 = 2 × 5

15 = 3 × 5

16 = 2 × 2 × 2 × 2

20 = 2 × 2 × 5

L.C.M = 2 × 2 × 2 × 2 × 3 × 5

⇒ 240

∴ The required LCM is 240

(a) n=6 and (n-1) = 5
∴ We start with (6 x 5) + 1 = 31
we have
6³= 31 + 33 + 35 + 37 + 39 + 41=216
(b) n=8 and (n-1)=7
∴ we start with (8 x 7)+1=57
we have
8³= 57 + 59 + 61 + 63 + 65 + 67 + 69 + 71 = 512
(c) n = 7 and (n-1) =6
∴ we start with (7 x 6) + 1 = 43
We have
7³= 43+ 45+ 47 + 49 + 51 + 53 + 55 = 343

(i) 7³-6³ = 1 + 7 x 6 x 3 = 127
(ii) 12³-11³ = 1 + 12 x 11 x 3 = 397
(iii) 20³-19³ = 1 + 20 x 19 x 3 = 1141
(iv) 51³-50³ = 1 + 51 x 50 x 3 = 7651

We know that a² - b² = (a + b)(a - b)

(√3 + √2) (√3 - √2)

= (√3)² - (√2)²

= 3 - 2

= 1

Aravalli mountain ranges are an example of Residual Mountain

• Since it is the residual part of an earlier mountain or plateau it is called residual mountains and is made up of relatively hard rocks.
• The erosion of soft rocks in an area is rapid whereas erosion of resistant rocks is low thus a degraded and flat area with hard and resistant rocks is formed.
• Aravalli is the oldest mountain range in the world and is very rich in natural resources.
• Aravalli is an example of residual mountains.
• It is located in the western part of India, Rajasthan.
• It is also known as Adavala Parvat in Rajasthan.

Hence, it is a mountain or landform that has been cut down by denudation becomes low and flat.

Maximum onion production takes place in Maharashtra.

Onion production in India:

• Maximum onion production takes place in Maharashtra (4905.0 thousand tons) state followed by Karnataka (2592.2 thousand tons), Gujarat (1514.1 thousand tons.), Bihar (1082.0 thousand tons.), Madhya Pradesh (1021.5 thousand tons.) and Andhra Pradesh (812.6 thousand tons).
• In Rajasthan, Haryana and Uttar Pradesh it is grown to some extent i.e. 494.2, 453.9 and 368.6 thousand tons respectively.

 Onion production statistics, 2017-18

Answer is (2)

N ∝ {1}/{sin⁴(θ/2)}

The correct answer is Saint Charandas.

• Women saint Daya Bai was a disciple of Saint Charandas.

• Saint Charandas
  • ​Charandas was born in Derha, near Alwar in 1706.
  • His family belonged to the Dhusar caste (merchant class).
  • He was succeeded to his spiritual seat by his cousin sisters of his Dhusar community of Alwar.
  • Two of his major disciples, Sahjo Bai and Daya Bai, both women.

• Saint Nimbarkacharya
  • ​The Nimbarka Sampradaya also known as the Hamsa Sampradāya, and Sanakādi Sampradāya, is one of the four Vaiṣṇava Sampradāyas.
  • It was founded by Nimbarka, a Telugu Brahman.
  • He was a follower of Dvaitadvaita.
  • Dvaitadvaita states that humans are both different and non-different from Isvara, God, or Supreme Being.
• Saint Raidas
  • Ravidas was an Indian poet-saint of the Bhakti movement during the 15th to 16th century CE.
  • Venerated as a guru (teacher) in the region of Uttar Pradesh, Rajasthan, Maharashtra, Madhya Pradesh, and mainly Punjab.
  • He was a poet-saint, social reformer, and spiritual figure.
• Saint Ramcharan
  • Ramcharan was born in Sodha, a village in the Tonk district of Rajasthan.
  • Charan's childhood name was "Ram Kishan".
  • Charan married Gulab Kanwar and became Patwari after marriage.
  • After some time the king of Jaipur (Amber, India) Jai Singh II of Amber offered him the post of Divan of Jaipur of Malpura branch.
  • He became a disciple of Kripa Ram Maharaj and followed him.

The correct answer is Mand.

• The singing tradition with which Gavari Devi was associated is Mand.

• Mand
  • ​Mand is a style of singing in Rajasthan, used in folk songs.
  • It is similar to the thumri and the ghazal.
  • Mand singers include:
    • Allah Jilai Bai from Bikaner (awarded Padma Shri-1982 and Sangeet Natak Akademi Award-1988 in Folk Music),
    • Mangi Bai Arya from Udaipur (awarded Sangeet Natak Akademi Award-2008 in Folk Music), and
    • Gavari Bai from Jodhpur (awarded by Sangeet Natak Akademi Award-1975-76 and 1986 in Folk Music).

​

• Langa
  • Singing style sang by Langa singers on Mangalik occasions and celebrations like Manganiyar in Bikaner, Barmer, Jodhpur and Jaisalmer district is called Langa.
  • Gayaki Sarangi and Kamayacha are the main instruments of the Rajputs.
  • The major Langa artists are Fuse Khau, Mahradin Langa, Alauddin Langa, Karim Khan Langa.
• Talabandi
  • In Rajasthan's eastern region Bharatpur, Dhaulpur, Karauli and Sawai Madhopur etc.
  • There is a classical tradition of folk singing style in which the poems of ancient poets associated with raga raganis are sung collectively, this is called talbandi singing.
  • There are sarangi, harmonium, dholak, tabla and jhoj and also play the nagada (bomb) in between.

All elements contains total 10 electrons.

(i) Inter molecular hydrogen bonding 

(ii) Intra molecular hydrogen bonding

The Correct Answer is Kiran Bedi.

• Kiran Bedi is an Indian police officer and is the first woman to join the Indian Police Service (IPS) in 1972.
• She was born on 9^th June 1949 in Amritsar, Punjab, and is one of the most celebrated and widely known police officers who ever served the Indian Police Force.
• Until taking voluntary retirement in 2007, she stayed in service for 35 years as Director-General, Bureau of Police Research and Development. 
• Bedi was crowned the national junior tennis champion as a teenager in 1966. She won multiple titles at different national and state-level competitions between 1965 and 1978.
• Bedi worked in Delhi, Goa, Chandigarh, and Mizoram after entering the IPS.
• She began her career in Delhi's Chanakyapuri district as an Assistant Superintendent of Police (ASP) and received the President's Police Medal in 1979.
• Then she moved to West Delhi, where she instituted a reduction in the number of crimes against women
• Subsequently, she supervised traffic arrangements for the 1982 Asian Games in Delhi and the 1983 CHOGM meeting in Goa as a traffic police officer.

A.R. Desai Sociologist has studies Indian National Movement by using Marxian Perspective.

Jagjeevan Ram is the author of "Bharat main Jativad Aur Harijan Saamasya".

Economic development factors Contributes to regional disparities in India.

• The first ever mega food park of Madhya Pradesh came up in Khargone District of the state and is named as the Indus Mega Food Park Private Limited. 
• Another mega food park is going to come up in Dewas district in the state as the second mega food park of the state. 
• The Indus Mega Food Park Private Limited has been established with a cost of Rs 127.70 crores and it is expected to benefit around 30000 farmers in the state. 

• Andhra Pradesh became the first state in the country to have a mega food park. 
• It came up in Chittoor District of the state and is mainly focused on providing global standards to the food processing infrastructure in the country. 

Correct option (B) 20

Correct option (A) Uridine

(D) Extra arm

The correct answer is Mirage.

• A mirage is a naturally occurring phenomenon in which light rays bend because of refraction to produce a displaced image of distant objects or the sky.

• It mostly occurs in the desert or at sea, by which the image of the object appears displaced above, below, or to one side of its true position as a result of variations in the refractive index of air.
• Thus, an object such as a tree appears to be inverted and appears to be on the bank of a pond because of Mirage.

Let the one number be 'x' and other number be y

According to question

2/5 of x = 2/3 of y

⇒ 2 × 3 × x = 5 × 2 × y

⇒ x/y = 5/3

∴ Required ratio = 5 : 3

Ovary half inferior or half superior.

1. Marginal, Basal 

2. Pea & Sunflower