Q1
The optical phenomenon that is responsible for the propagation of light signal through an optical fibre is
general-sciencephysics-light-electricity
UPSC CAPF (AC) · Solved paper
All 125 questions, textbook-style — tap “Show answer” on any question to reveal the correct option and explanation.
The optical phenomenon that is responsible for the propagation of light signal through an optical fibre is
Which of the following statements about optical microscope is/are correct?
Select the correct answer using the code given below.
Which one of the following gemstones contains beryllium metal?
Lowering the atmospheric pressure on a liquid
The number of angular and radial nodes for 4d orbital is respectively
Which one of the following statements about proteins in mammalian cells is correct?
Which one of the following statements about transport mechanism in plants is correct?
If the amplitude of oscillation of a simple pendulum is very small, then its time period of oscillation
Select the correct answer using the code given below.
The term LASER stands for
Which of the following statements about carboxylic acids is/are correct?
Select the correct answer using the code given below.
Match List-I with List-II and select the correct answer using the code given below the Lists:
List I (Compound):
List II (Type of polymer):
The Tropic of Cancer passes through which one of the following countries?
Gersoppa Falls is formed by which one of the following rivers?
Which one of the following processes is not a part of long-wave radiation?
In mid-latitude regions, the diurnal variation in weather is due to
Springs are common in which of the following areas?
Select the correct answer using the code given below.
Consider the following diagram: [An equilateral triangle inscribed in a circle of radius 1 unit; the circular segment below the base of the triangle is shaded.] An equilateral triangle is inscribed in a circle of radius 1 unit. The area of the shaded region, in square unit, is
In an examination, 53% students passed in Mathematics, 61% passed in Physics, 60% passed in Chemistry, 24% passed in Mathematics and Physics, 35% in Physics and Chemistry, 27% in Mathematics and Chemistry and 5% in none. The ratio of percentage of passes in Mathematics and Chemistry but not in Physics in relation to the percentage of passes in Physics and Chemistry but not in Mathematics is
Consider the following diagrams: [Four circles, each divided into four quadrants. Circle 1: top-left 14, top-right 36, bottom-left 25, bottom-right 25. Circle 2: top-left 20, top-right 50, bottom-left 20, bottom-right 10. Circle 3: top-left 36, top-right 54, bottom-left 7, bottom-right ?. Circle 4: top-left 30, top-right 30, bottom-left 0, bottom-right 40.] Which one of the following is the missing number in the diagrams given above?
Which one of the following is the area of a sector of a circle of radius 10 cm formed by an arc length of 15 cm?
On simplification the product (x₁ − y₁)(x₂ + y₂) ... (x₁₀ + y₁₀), how many such terms are there which will have only single x and rest y's?
Which one of the following statements about blood elements is correct?
Which one of the following statements regarding muscle contraction and relaxation is correct?
Which one of the following statements regarding digestion is correct?
Which one of the following statements is correct?
Which one of the following statements regarding insulin hormone is correct?
Match List-I with List-II and select the correct answer using the code given below the Lists:
List I (Limestone region):
List II (Country):
Which of the following cities experience the warm temperate Mediterranean climate?
Select the correct answer using the code given below.
Which one of the following is the correct descending order of Indian States in terms of their density of population (as per 2011 Census)?
Which one of the following major river basins of India is the shortest in length and smallest in terms of catchment area?
Arabian Sea records higher salinity than the Bay of Bengal because
At what time between 2 o'clock and 3 o'clock will the hour and minute hands of a clock be 12 minutes division apart?
If the number 2² x 5⁴ x 4⁶ x 10⁸ x 6¹⁰ x 15¹² x 8¹⁴ x 20¹⁶ x 10¹⁸ x 25²⁰ is divisible by 10ⁿ, then which one of the following is the maximum value of n?
Suppose a, b, c, d and e are five consecutive odd numbers in ascending order. Consider the following statements:
Which of the statements given above is/are correct?
A king ordered to make a crown from 8 kg of gold and 2 kg of silver. The goldsmith took away some amount of gold and replaced it by an equal amount of silver and the crown when made, weighed 10 kg. The king knows that underwater gold loses 1/20th of its weight, while silver loses 1/10th. When the crown was weighed underwater, it was 9.25 kg. How much gold was stolen by the goldsmith?
If a cubical container of length, breadth and height each of 10 cm can contain exactly 1 litre of water, then a spherical container of radius 10.5 cm can contain
Which one of the following sites does not have coral reef formation?
Which of the following statements are appropriate to Mangrove Sites?
Select the correct answer using the code given below.
Which one of the following pairs is not correctly matched?
The lowest temperature is observed/recorded in which one of the following layers of the atmosphere?
Which one of the following ocean currents is not a warm current?
What is the largest value for n (natural number) such that 6ⁿ divides the product of the first 100 natural numbers?
The angle between the hour hand and the minute hand of a clock at 10 minutes past 3 is
An international conference is attended by 65 people. They all speak at least one of English, French and German language. Suppose 15 speak English and French, 13 speak English and German, 12 speak French and German and 5 speak all the three languages. A total of 30 people can speak German and 30 can speak French. What is the number of people who can speak only English?
Suppose 72 = m x n, where m and n are positive integers such that 1 < m < n. How many possible values of m are there?
Suppose x, y, z are three positive integers such that x < y < z and xyz = 72. Which one of the following values of S yields more than one solution to the equation x + y − z = S?
Which one of the following is the remainder when 10²⁰ is divided by 7?
Which one of the following is anisotropic in nature?
Which one of the following is not a condensation polymer?
The tides whose height is 20 percent more than normal tide are called
Which of the following statements about tropical cyclone are correct?
Select the correct answer using the code given below.
Which of the following statements about biodiversity hot spots is/are correct?
Select the correct answer using the code given below.
Which one of the following is not an igneous rock?
Which one of the following rivers is west flowing?
Consider an equilateral triangle ABC as given in the following diagram: [Equilateral triangle with A at the top, C at bottom-left, B at bottom-right; arrows indicate clockwise movement along the sides.] Two people start at the same time from points A and B with speeds 30 km per hour and 20 km per hour respectively, and move on the sides of the triangle in the clockwise direction. They meet each other for the first time at
The number of ways in which 3 boys and 2 girls can be arranged in a queue, given that the 2 girls have to be next to each other, is
The ratio of ages of a man and his son is 3:1. After 15 years, the age ratio will be 2:1. What is the age of the man?
Two pillars are placed vertically 8 feet apart. The height difference of the two pillars is 6 feet. The two ends of a rope of length 15 feet are tied to the tips of the two pillars. The portion of the length of the taller pillar that can be brought in contact with the rope without detaching the rope from the pillars is
Directions: The following eight (8) items consist of two statements, Statement I and Statement II. Examine these two statements carefully and select the correct answer using the code given below. Code: (a) Both the statements are individually true and Statement II is the correct explanation of Statement I; (b) Both the statements are individually true but Statement II is not the correct explanation of Statement I; (c) Statement I is true but Statement II is false; (d) Statement I is false but Statement II is true.
Which of the following statements about town planning in British India in early 19th century is/are correct?
Select the correct answer using the code given below.
Which of the following statements about India's Independence is/are correct?
Select the correct answer using the code given below.
Who among the following in Congress represented the socialist view?
Sikkim became an Associate State of the Indian Union through
Which one of the following judgements is associated with the primacy of the Chief Justice of India and the Collegium of Judges in the appointment and transfer of the higher judiciary?
Which one of the following Constitutional Amendments has enormously strengthened the powers of the Speaker/Chairman of the Houses of the Parliament/State Legislatures?
Which one of the following Committees of the Parliament has no Members from the Rajya Sabha?
Which one of the following States does not find a mention in Article 371 of the Constitution of India?
In May 2018, which one of the following banks was restricted from giving fresh credit and new recruitment of staff by the Reserve Bank of India?
When was Startup India Hub operationalized to resolve queries and handhold startups?
Who among the following is not associated to the Governing Council of NITI Aayog?
Which one of the following organizations is not merged into a new umbrella scheme “Rashtriya Yuva Sashaktikaran Karyakram (RYSK)”?
Which one of the following countries has recently formally notified its intention to withdraw from the International Criminal Court?
Who among the following has recently been elected as the Prime Minister of China for a second term?
Which of the following statements about the Constitution of India is/are correct?
Select the correct answer using the code given below.
Which one of the following statements about the Constitution of India is correct?
Who among the following has not written about partition in his works?
Which of the following statements about Harappa Civilization is/are correct?
Select the correct answer using the code given below.
Which of the following statements about Jainism is/are correct?
Select the correct answer using the code given below.
Which one of the following pairs of countries with new names and old names is correctly matched?
New name — Old name
In India, Indus Dolphin, one of the world's rarest mammals, is mainly found in which one of the following rivers?
Who among the following cricketers has announced his retirement from international cricket in May 2018?
In a recent deal, a large stake of which one of the following e-commerce companies was acquired by Walmart, an American multinational retailer?
Which one of the following films was awarded Best Feature Film in the National Film Awards, 2018?
Which one of the following groups belongs to the same school of thought?
The Provisions of the Panchayats (Extension to the Scheduled Areas) Act, 1996 (PESA)
Over which of the following, the Lok Sabha and the Rajya Sabha held joint sittings to resolve their differences?
Select the correct answer using the code given below.
Which one of the following Commissions has not examined the issue of removal of the Governor of a State?
Which one of the following is the correct combination of languages included in the 8th Schedule of the Constitution of India?
Recently, the Armed Forces (Special Powers) Act was completely removed from which one of the following States?
15th Asia Media Summit was hosted in May 2018 in
In India, cars bearing black number plate with yellow lettering are
In May 2018, who among the following was elected as the Prime Minister of Malaysia at the age of 92?
In May 2018, bus service between which two places of India and Nepal was launched?
In May 2018, which one of the following countries has located its embassy in Israel from Tel Aviv to Jerusalem?
Who among the following was Buddha's foster mother?
Which of the following statements about Bodhisattas is/are correct?
Select the correct answer using the code given below.
Depiction of the descent of the river Ganga from heaven in the form of relief sculpture on rock is at
Which one of the following statements relating to the power of the President of India to grant pardon is not correct?
Which one of the following is not a characteristic feature of the Indian Independence Act, 1947?
In National Income (NI) accounts, Personal Income (PI) is defined as
The Reserve Bank of India defines narrow money as
Suppose the price of mangoes increases from 50 per kg to 75 per kg. Due to this, the demand for mangoes declines from 100 kg to 50 kg. Which one of the following is the price elasticity of demand for mangoes?
Multipliers will be lower with which one of the following?
Which of the following is/are considered as India's green initiative(s)?
Select the correct answer using the code given below.
Which one of the following commercial centres declined after mid-eighteenth century?
Which of the following statements about Binodini Dasi, a pioneering figure in Bengali theatre in the late 19th early 20th century, is/are correct?
Select the correct answer using the code given below.
The National Green Tribunal, set up to deal with the expeditious disposal of cases relating to environmental protection, was set up under the
Which one of the following statements with regard to Panchayats is not correct?
Which one of the following concerns has found a place in both Fundamental Duties and Directive Principles of State Policy?
Which one of the following is not a part of the Directive Principles of State Policy?
Who among the following was the author of Hind Swaraj?
The Buddhist text Majjhima Nikaya is in
The federal systems of India and the USA are different in all the following respects, except
The power of the President of India to refer a matter back to the Council of Ministers for reconsideration was inserted in the Constitution by
Ashok Mehta Committee was constituted to make recommendations on which one of the following issues?
In India, approximately what percentage of households still use firewood for cooking as per 2011 Census?
Consider the following countries:
If farmers' loans are waived in India, how will it affect the aggregate demand in the economy?
Select the correct answer using the code given below.