Explore topic-wise InterviewSolutions in Current Affairs.

Correct option is (B) 3 hrs 15 min

Speed = \(\frac{Distance}{Time}\)

\(=\frac{51\,km}{45\,minutes}=\frac{51}{45}\,km/minutes\)

Same train travels 221 kms

\(\therefore\) Taken time \(=\frac{Distance}{Speed}\) \(=\frac{221\,km}{\frac{51}{45}\,km/minutes}\)

= 221 \(\times\frac{45}{51}\) minutes

= 13 \(\times\frac{45}3\) minutes

= 13 \(\times\) 15 minutes

= 195 minutes

= 180 minutes + 15 minutes

= 3 hours 15 min

\(\therefore\) Time taken to travel 221 kms by same train is 3 hours 15 min.

B) 3 hrs 15 min

(a) The processes that take place in the interior of the earth cause in the storage of energy in some portions in the Earth.

Earthquakes occur on those instances. When this energy is bring released.

(b) i. Primary waves 

ii. Secondary waves 

iii. Surface waves 

(c) The surface waves are the most destructive. 

d) In Richter scale

• There are three types of plate margins. They are Divergent margin, Convergent margin and Trans-form margin.
• Divergent margin: Plates move apart from each other. Oceanic ridges are formed.
• Convergent margin: Plates move towards each other. Fold mountains and ocean trenches are formed.

(i) Uric acid 

(ii) Ammonia

Correct option is (C) 12

Let mean proportion of 8 and 18 is x.

\(\therefore\) 8 : x : : x : 18

\(\Rightarrow\) \(\frac8x=\frac x{18}\)

\(\Rightarrow\) \(x^2=8\times18\) \(=2^2\times2\times2\times3^2\) \(=2^2\times2^2\times3^2\) \(=(2\times2\times3)^2\)

\(\Rightarrow\) \(x^2=12^2\)

\(\Rightarrow\) x = 12

\(\therefore\) Mean proportion of 8 and 18 is 12.

Correct option is  C) 12

Correct option is (C) 30

Given that 2.8, 7, 12 and x are in proportion.

\(\therefore\) 2.8 : 7 = 12 : x

\(\Rightarrow\) \(\frac{2.8}7=\frac{12}x\)

\(\Rightarrow\) \(x=12\times\frac7{2.8}=\frac{12}{0.4}=\frac{120}4\) = 30

Correct option is  C) 30

Correct option is (A) 2.4

Let mean proportion of 1.2 and 4.8 is x.

\(\therefore\) 1.2 : x : : x : 4.8

\(\Rightarrow\) 1.2 : x = x : 4.8

\(\Rightarrow\) \(\frac{1.2}x=\frac x{4.8}\)

\(\Rightarrow\) \(x^2=1.2\times4.8\) \(=1.2\times(1.2\times4)\)

\(\Rightarrow\) \(x^2=1.2^2\times2^2\) \(=(1.2\times2)^2\) \(=(2.4)^2\)

\(\Rightarrow\) x = 2.4

\(\therefore\) Mean proportion of 1.2 and 4.8 is 2.4.

Correct option is  A) 2.4

• Plate movements
• Faulting
• Collapse of roofs of mines
• Pressure in reservoirs
• Volcanic eruptions.

Correct option is (D) l b

Area of rectangle = Length \(\times\) Breadth

= \(l\,b\) square units.

Correct option is  D) l b

Correct option is  D) All the above

Correct option is (B) 6 : 5

Inverse ratio of 5 : 6 is 6 : 5.

Correct option is  B) 6 : 5

Wool is used to make these woolen fabrics.

I choose silk or cotton fabric to wear in an important celebrations like Sankranthi.

Rocks in the deeper interior of the earth undergo displacement and faults due to the plate movements and other causes. Under such situations, severe pressure is exerted on the earth’s lithosphere and seismic waves are generated. These waves create tremors on the earth’s surface: These are experienced by as Earthquakes.

• Plates movements and faulting
• Collapse of roofs of mines
• Pressure in reservoirs
• Volcanic eruptions.

The bond which is formed between the 3‘-OH of one deoxyribonucleotide and 5‘-phosphate residue of an adjacent deoxyribonucleotide.

If deposit of ₹ 2000 earns in 3yr with an interest = ₹ 500

Then, a deposit of ₹ 1000 earns in 3yr with an interest = 500/2 = 250

Similarly, deposit of ₹ 3600 i.e. ₹ 36 × 1000 earns in 3yr with an interest = 250×36 = ₹ 9000

If x varies directly as y.

∴  x/y = k (constant)

If x = 80 and y = 160 …(i)

∴ x/y = 80/160 = 1/2

⇒ k = 1/2

When x = 64, then from Eq. (i)

64/y = 1/2

⇒ y = 64 × 2 = 128

Since l varies directly as m.

a. Equation related to l and m is 1/m = k (constant)

b. if l = 6 and m = 18, then k = 6/18 = 1/3

c. If m = 33, then

1/m = 1/3

1/33 = 1/3

l = 33/3 = 11

d. If l = 8

1/m = k

8/m = 1/3

m = 8 x 3 = 24

True

∵Height of a tree = 24m

Then its shadow = 15m

With the similar condition, if a pole has a shadow of length = 6m

Let the height of pole = x m

Since, length and shadow vary directly.

Then, 24/15 = x/6

⇒ 15 × x = 24× 6

⇒ x = (24 x 6)/15

⇒ x = 9.6 m

x and y are said to vary directly with each other if for some positive number k, x/y =k.

When two quantities x and y are in inverse proportion or vary inversely they are written as x ∝ 1/y.

Uniform Speed = \(\frac{Total\,Distance}{Total\,Time}\)

Let distance be x km, time = \((2+\frac{24}{60})\) hr = \((2+\frac{2}{5})\) hr = \(\frac{12}{5}\) hr

⇒ 5km/hr = \(\frac{\frac{x}{12}}5{}\)

⇒ x = 5 × \(\frac{12}{5}\) = 12 km

Both x and y are said to vary inversely with each other if for some positive number k, xy = k.

(d) speed and time taken.

Explanation: 

By the formula of speed we know;

Speed = distance/time

As we can see here, when the time decreases, the speed increases. Hence, they inversely proportional.

When two quantities x and y are in direct proportion or vary directly they are written as x ∝ y.

Establishment of Colonies in West Europe:

1. The western European countries wanted to expand their empire in Asia-Africa.
2. They did not spare even their neighbouring countries.
3. Spain had taken control over Netherland, Belgium and Luxemburg.
4. Portugal came under the rule of the Spanish king because of his blood relation.
5. Italy and German states became the victim of the greed of the France and Austria.
6. When European powers were tightening their grip over the Asian and African nations, many of the European nations which had become free, following the footsteps of England, made many of the Afro-Asian nation their Colonies.

Colonialism in Asia:

1. After strengthening its grip over India, England (British) expanded its empire to Sri Lanka, Myanmar, Singapore and Malaysia.
2. England entered China also and imposing trade of opium upon China. This led opium wars.
3. China lost war and thereby lost five of its ports to England where England carried on its trade and thus expanded their empire.
4. Due to weakness of China, Japan, Russia, Germany, France, Belgium and America also acquired trade and political rights.
5. Due to enormous oil resources of West Asia Europeans established colonies there.
6. England, Germany, Russia and America established oil companies in Iran, Iraq , Kuwait, Saudi Arabia and Bahrain.

Colonies in Africa:

1. The Dutch established its colony for the first time at the end of 15th Century in South Africa.
2. England and France established their colonies in Cape and Algeria in North Africa.
3. King Leopold of Belgium seized the vast provinces of Congo and established his rule.
4. England established its colonies in Egypt, some provinces of East Africa and some of South Africa.
5. France established its colonies in Tunisia, Morocco and West Africa provinces.
6. Germany established its empire in some provinces of East and West Africa.
7. Italy captured the African provinces around the Red sea.
8. After the end of Berlin Conference, the African territories were divided among the European nations.

Taking the mass of the Earth as (about) 6 × 10²⁴ kg, and the linear speed of the earth around the Sun as (about) 3 × 10⁴ m/s, we have, the de Brogue wave length of the Earth as

λ = \(\cfrac{h}p\) = \(\cfrac{h}{M_e}\) = \(\cfrac{6.63\times10^{-34}J.s}{(6\times10^{24}kg)(3\times10^4m/s)}\)

= 3.683 × 10^-63 m (extremely small)

Given, xy = 10

⇒ x = 10/y

Hence, a and y vary inversely with each other.

Given, x = 5y

Then, x/y = 5/1 = k = constant

∴ x and y vary directly with each other.

(b) 35 and 25

Explanation: 

x and y are directly proportional.

x ∝ y

If x = 10 and y = 14, then;

10 ∝ 14 or 5 ∝ 7

Now, if we compare,

(a) 25 ∝ 35 = 5∝7

(b) 35 ∝ 25 = 7 ∝ 5

(c) 35 ∝ 49 = 5 ∝ 7

(d) 15 ∝ 21 = 5 ∝ 7

Therefore, option (b) is not a possible pair of corresponding values of x and y.

(d) 500/3 m

Explanation:

Distance travelled = 10 km

Time taken = 1 hr

In one minute, distance covered = 10/60 km = (10×1000)/60 m

= 500/3 m

• Sexual orientation refers to an individual’s pattern of physical and emotional arousal, towards another person.
• Heterosexual individuals are attracted to persons of the opposite sex. 
• Homosexual individuals are attracted to persons of the same sex. 
• Bisexual individuals are attracted to person of both sexes. 
• During adolescence, sex hormones become active and adolescents become conscious of their sexual orientation. 
• Adolescents who are homosexual or bisexual become confused when they realise that their sexual orientation is different from their peers.

• Adolescents may face the problem of being bullied. They may be humiliated or fall victim to other people’s aggression when they have less power or prestige.
• Bullying can be physical, emotional or mental. The intent of bullying is always negative.
• Almost all bullies are victims themselves. Both, bullies and victims are low in self-esteem.
• Bullies are aggressive, ruthless manipulators who don’t trust others, break their promises and take unfair advantage of others. They respond to stress with aggression or by engaging in self-destructive behaviour.
• Boys generally indulge into bullying to gain power while girls indulge in bullying when they are depressed.

When the speed remains constant, the distance travelled is directly proportional to the time.

e.g. if 10km cover in 10min with uniform speed, then 20km cover in 20min with same speed.

More the number of taps, lesser the time required to fill a tank. So, it is an inverse proportion. 

Let the required time be x minutes. 

⇒ 8 × 27 = 6 × x

⇒ x = \(\frac{8\,\times\,27}{6}=\) 36 minutes

Time taken by 12 pumps to empty a reservoir = 20 hr

Time taken by 1 pump to empty the reservoir = 20 × 12 = 240 hr

Hence, time taken by 45 pumps to empty the reservoir = 240/45 = (240 × 60)/45

= 14400/45 = 320 min

= 5×69 + 20 min

= 5 hour 20 min

More the number of taps, lesser the time required to fill a tank. So, it is an inverse proportion. 

Let the required time be x minutes.

⇒ 7 × (60 + 36) = 8 × x

⇒ x = \(\frac{7\,\times\,96}{8}\) = 84 minutes = 1 hour 24 minutes

Number of pumps and time to fill the tanks are in inverse proportion.

⇒ x₁y₁ = x₂ y₂

⇒ 5 × 1\(\frac12\) = x x 1\(\frac12\)

⇒ 5 × \(\frac32\) = x x \(\frac12\)

⇒ x = 5 × 3 = 15

∴ Number of pumps required = 15

False

If x varies inversely as y, i.e. xy = k(constant)

If x = 6 and y = 8

∴ xy = 6×8 = 48

But if x = 8 and y = 10

∴ xy = 8 × 10 = 80

Here, 48 ≠80

Hence, the value of y is not 10

If x varies inversely as y.

∴ xy = k(constant) …(i)

If x = 20 and y = 600

∴xy = 20× 600 = 12000

⇒ k = 12000

When x = 400, then from Eq. (i)

y× 400 = k

⇒ y × 400 = 12000

⇒ y = 12000/400 = 30

Movement speed: It is the ability to do a single movement in minimum of time. Movement speed is of high relevance in acyclic sports. In cyclic sports it is important in initial phase (e.g.. start movement) or in phase during the total period of cyclic activity,, e.g., turns in swimming, hurdle clearance, etc. In acyclic sports, movement speed is very closely bound with technique and tactical action. Movement speed depends largely on explosive strength and technique. 

Speed endurance: Is considered as ability of an individual to perform in speed in conditions of fatigue For example: When a long distance runner finishes the race with a great speed. It can be developed by developing strength in the legs and by developing coordination between arms and legs.

If x varies inversely as y

∴ xy = k (constant)

If x = 1.5 and y = 60

∴ xy = 1.5 x 60 = 90

⇒ k = 90

When y = 4.5, then from Eq.(i),

45 × y = k

⇒ 45 × y = 90

⇒ y = 90/4.5 = 20

∵For 300 persons flour is enough for 42 days.

∴ For 1 person’s flour enough = 300 × 42 = 1260 days.

Now, 20 more persons join the camp.

So, total persons = 300 + 20 = 320

∴ For 320 persons flour enough = 12600/320 = 3/8 days

∵ In 9 months, a part of stadium can complete by 560 persons.

∴ In 1 month, the work can be complete by 9 × 560 = 5040 persons.

∵ In 5 months, the work can be complete by 5040/5 = 1008 persons.

The term motivation is derived from a latin word "Movere" meaning "To change", "To move". When we say that one is motivated, it means that he is driven or moved by an inner urge or force to achieve this goal. We may describe motivation as a process through which an individual is inspired, stimulated, to act in a particular fashion or manner towards a particular direction. 

A person who has a high level of motivation is likely to perform better and show excellence as compared to the one who is not motivated or is less motivated. Motivation may be considered as something that compels, prompts and energizes an individual to act or behave in a particular fashion at a particular time for attaining some specific goal or purpose. Motivation is a state of being with motive or reason for initiating a conscious and purposeful effort. Motivation includes all those internal conditions which begin an activity or sustain it. According to P.T. Young, "Motivation is the process of arousing action, sustaining the activity in progress and regulating the pattern of activity." 

True, because ar (PQRS) = ar (EFRS) = 2 ar (MFR)

According to B.C. Rai: "Motivation is a psychological and physical condition that causes one to expand effort to satisfy needs and wants." 

According to Crooks & Stein: Motivation can be defined as "any condition that might energize and direct our actions."

According to Murray: "Motivation is an internal factor that arouses, directs and integrates a Person's behaviour." 

According to Singer: "Motivation is the urge to push forward a specific goal." 

Sports psychology is an important ingredient of sports training programme and deals with the way in which various psychological states and traits influence sports performance. It is the application of psychology to the issues and problems in the field of sports as the problems of sports persons are quite unique different, subtle and complex. 

The main purpose of sports psychology is to understand the behaviour of an athlete and to modify it according to the demands of situations, to optimize the benefits for elite performance and excellence.