Bihar Police Constable flashcards
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- Article 324
- It establishes the Election Commission of India and vests superintendence, direction and control of elections in it.
- Bihar Diwas
- Observed on 22 March each year to commemorate the creation of Bihar as a separate province on 22 March 1912.
- NITI Aayog
- Policy think tank formed on 1 January 2015, replacing the Planning Commission; the Prime Minister serves as its Chairperson.
- Tropic of Cancer
- Latitude 23.5° N; it passes through eight Indian states, including Bihar near Gaya, and marks the northern limit of the tropics.
- Ohm's law
- The current through a conductor is directly proportional to the potential difference across it, expressed as V = IR.
- Photosynthesis equation
- 6CO2 + 6H2O in the presence of light and chlorophyll yields C6H12O6 + 6O2, occurring in chloroplasts.
- pH scale
- A 0–14 scale measuring hydrogen ion concentration; below 7 is acidic, above 7 is basic, and 7 is neutral at 25 °C.
- Universal donor
- Blood group O negative, because its red cells carry neither A nor B antigens nor the Rh D antigen.
- Newton's second law
- The force on a body equals its mass times its acceleration (F = ma); the SI unit of force is the newton.
- Simple interest formula
- SI = P × R × T ÷ 100, where P is principal, R is annual rate percent, and T is time in years.
- Average formula
- Average equals the sum of all observations divided by the number of observations; it shifts equally when every value shifts.
- Speed conversion
- To convert km/h to m/s multiply by 5/18; to convert m/s to km/h multiply by 18/5.
- Work together formula
- If A completes a job in x days and B in y days, working together they finish it in xy/(x + y) days.
- Successive percentage change
- Two successive changes of a% and b% produce a net change of a + b + ab/100 percent, with signs applied.
- Profit percentage
- Profit percent equals (selling price − cost price) divided by cost price, multiplied by 100; it is always based on cost price.
- Reverse alphabet position
- The reverse position of a letter equals 27 minus its forward position; for example, A is 1 forward and 26 reverse.
- Blood relation: maternal uncle
- The brother of one's mother is the maternal uncle; similarly, the sister of one's father is the paternal aunt.
- Direction after right turn
- A right turn rotates the facing direction 90° clockwise; from North a right turn leads to East.
- Odd days in a year
- A normal year has 1 odd day and a leap year 2 odd days; 100 years have 5 odd days.
- Syllogism validity rule
- A conclusion is valid only if it is true in every possible diagram of the premises; 'All A are B' does not imply 'All B are A'.
- संधि
- दो वर्णों के मेल से उत्पन्न विकार को संधि कहते हैं; स्वर संधि के दीर्घ, गुण, वृद्धि, यण और अयादि - पाँच भेद हैं।
- समास
- दो या अधिक शब्दों के मेल से बने संक्षिप्त पद को समास कहते हैं; इसके छह भेद हैं, जिनमें तत्पुरुष और द्वंद्व प्रमुख हैं।
- उपसर्ग और प्रत्यय
- उपसर्ग शब्द के आरम्भ में जुड़कर अर्थ बदलता है, जबकि प्रत्यय शब्द के अंत में जुड़कर नया शब्द बनाता है।
- तत्सम और तद्भव
- तत्सम शब्द संस्कृत से अपरिवर्तित रूप में आए हैं, जबकि तद्भव शब्द संस्कृत से बदलकर हिंदी में प्रचलित हुए हैं।
- अनुप्रास अलंकार
- जब एक ही वर्ण की आवृत्ति कई बार होती है, तो अनुप्रास अलंकार होता है; यह शब्द-सौंदर्य बढ़ाता है।
- Subject-verb agreement
- A singular subject takes a singular verb; words such as each, every and either are followed by singular verbs.
- Present perfect tense
- Formed with has or have plus the past participle; it expresses a past action that has present relevance.
- Since versus for
- Since is used with a point of time (since 2010), while for is used with a duration (for five years).
- Passive voice formation
- The object becomes the subject, the verb becomes be plus past participle, and the doer is introduced by by.
- Bihar state animal
- The gaur (Indian bison) is the state animal of Bihar; the state bird is the house sparrow and the state tree the peepal.
- Kosi river
- A major Himalayan river in Bihar known as the Sorrow of Bihar because of its shifting course and frequent devastating floods.
- Madhubani painting
- A traditional folk art of the Mithila region of Bihar, also called Mithila painting, known for intricate line work and natural dyes.