Agniveer Army flashcards
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32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Area of a circle
- The area of a circle equals pi multiplied by the square of its radius, written A = πr². Its circumference is 2πr.
- Pythagoras theorem
- In a right triangle, the square of the hypotenuse equals the sum of the squares of the other two sides, so a² + b² = c².
- Simple interest formula
- Simple interest equals principal multiplied by rate multiplied by time, divided by 100, with the rate given per annum in percent.
- HCF and LCM relation
- For two positive integers, HCF multiplied by LCM equals the product of the two numbers, allowing the missing value to be calculated.
- Average of numbers
- Average equals the sum of all observations divided by the number of observations; it always lies between the smallest and largest values.
- Compound interest amount formula
- Compound amount equals P(1 + R/100)^n, where P is principal, R the annual rate percent and n the number of years; interest is amount minus principal.
- Speed and unit conversion
- Speed equals distance divided by time. Multiply km/h by 5/18 to obtain m/s, and multiply m/s by 18/5 to obtain km/h.
- Volume of a cylinder
- The volume of a cylinder equals πr²h, where r is the base radius and h is the height; its curved surface area is 2πrh.
- Newton's first law
- A body remains at rest or in uniform motion in a straight line unless acted on by a net external force; this property is called inertia.
- Ohm's law
- At constant temperature, current through a conductor is directly proportional to the potential difference across it, giving V = IR with R in ohms.
- Photosynthesis balanced equation
- Green plants use sunlight, carbon dioxide and water to produce glucose and oxygen: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, inside chloroplasts.
- Universal donor blood group
- O negative blood is the universal donor because its red cells carry no A, B or RhD antigens, so recipients rarely reject it.
- SI unit of force
- The SI unit of force is the newton, symbol N. One newton accelerates a mass of one kilogram at one metre per second squared.
- pH scale
- pH measures hydrogen ion concentration on a scale from 0 to 14: below 7 is acidic, 7 is neutral and above 7 is basic.
- Largest human organ
- The skin is the largest organ of the human body. It protects against injury and infection and helps regulate body temperature.
- Speed of light
- Light travels in vacuum at about 3 × 10⁸ metres per second, which is roughly 300,000 kilometres per second.
- Constitution adoption date
- India's Constitution was adopted by the Constituent Assembly on 26 November 1949 and came into force on 26 January 1950.
- RBI establishment
- The Reserve Bank of India was established on 1 April 1935, was nationalised in 1949, and has its headquarters in Mumbai.
- Chandrayaan-3 landing
- India's Chandrayaan-3 lander touched down near the Moon's south pole on 23 August 2023, making India the first country to land there.
- National bird of India
- The Indian peacock is the national bird of India, adopted in 1963, and it is protected under the Wild Life Protection Act.
- ISRO headquarters
- The Indian Space Research Organisation was formed in 1969 and is headquartered in Bengaluru; it runs India's satellite and launch vehicle programmes.
- Fundamental Rights count
- The Indian Constitution originally listed seven Fundamental Rights; the Right to Property was removed by the 44th Amendment in 1978, leaving six.
- First Indian in space
- Rakesh Sharma became the first Indian to travel into space in 1984, flying aboard the Soviet Soyuz T-11 mission.
- UN founding date
- The United Nations was founded on 24 October 1945, is headquartered in New York City, and currently has 193 member states.
- Alphabet position trick
- Number letters A = 1 to Z = 26. The opposite letter of the letter at position n has position 27 − n, useful in coding questions.
- Syllogism validity rule
- A conclusion follows only if it is true in every possible diagram of the premises; 'some A are B' never proves 'all A are B'.
- Blood relation notation
- Draw a family tree, marking one symbol for males and another for females, using vertical links for parents and horizontal links for spouses or siblings.
- Direction sense turns
- Each right turn rotates the facing direction 90° clockwise and each left turn 90° anticlockwise; turning right from north faces east.
- Odd one out rule
- Identify the property shared by most options, such as being prime, a perfect square, or divisible by a number, and select the option that breaks it.
- Clock angle formula
- The angle between the hour and minute hands equals |30H − 5.5M| degrees, where H is the hour and M the minute.
- Number series approach
- Compare consecutive terms using differences, ratios, squares or cubes; alternating and two-tier patterns are common in series questions.
- Analogy relationship
- State the exact relationship in the given pair, such as part to whole or cause to effect, then apply that same relationship to the options.