Measurements and Numbers —The International System of Units (SI)
-Metre (unit of length) — defined as the distance travelled by light in a vacuum in 1/299,792,458 second. - Kilogram (unit of weight) — which equals 1,000 grams as defined by the international prototype kilogram of platinum-iridium in the keeping of the International Bureau of Weights and Measures.
Scientific Instruments and Appliances
Altimeter — is a special type of aneroid barometer, used in measuring altitudes. Ammeter — is an instrument to measure the strength of an electric current. Amplifier — is an electronic device that increases the strength of a signal fed into it.
Scpoe, Possibilities, Avenues and Options After +2 for the bright career beyond the traditional
Sometimes it seems impossible in the beginning but it can be made possible through strong will-power, hard work and a right decision or choice. Students of Science, Technology, Engineering and Mathematics (STEM) look forward to a bright career after completion of their studies.
The Background of the Indian Constitution & the features borrowed from Foreign Constitutions
During World War II and under the stress of international conditions Sir Stafford Cripps was sent over to India on March 24, 1942 to win over the support of Indian political leaders. Sir Stafford Cripps proposed for setting up a body for preparing the Constitution of India after the termination of the War.
Current Affairs for May & June 2019
May 2, 2019 - The state of Odisha was struck by an extremely severe cyclonic storm named 'Fani' on May 2, 2019. May 21, 2019 - Mr. Joko Widodo has been re-elected as the President of Indonesia on May 21, 2019.
Inventions and Discoveries with the Inventor's Name - Part II
Neon Lamp — Invented by Georges Claude (France) in the year 1915. Nineteenth Law(s) of Planetary Motion — Invented by Johannes Kepler (Germany) in the year 1609. Nylon — Invented by Dr. Wallace H. Carothers (USA) in the year 1937.
Different Branches of Science
The purpose of study of science is a quest for knowledge. It is a systematised knowledge derived from observation, study and experimentation carried on in order to determine the nature or principles of what is being studied.
Current Affairs for April 2019
April 5, 2019 - Mr. Praful Patel, the President of All India Football Federation, has become the first Indian to be elected as a member of the FIFA Executive Council. The election was held during the 29th Asian Football Confederations Congress in Kuala Lumpur on April 5, 2019.
বাংলা ভাষার ধ্বনি পরিবর্তনের কারণগুলি উল্লেখ কর, তৎসহ ধ্বনি পরিবর্তনের ধারাগুলির পরিচয় দাও এবং এ প্রসঙ্গে অপিনিহিতি, স্বরসঙ্গতি এবং সমীভবন বিষয়ে টীকা লেখ ।
বাংলা একটা প্রাণবন্ত চলমান ভাষা । বহু বছরের ধীর ও ধারাবাহিক বিবর্তনে বাংলা ভাষার বর্ণ ও সংযুক্ত বর্ণের মূল ধ্বনির নানা পরিবর্তন ঘটেছে । ধ্বনির পরিবর্তনশীলতা বাংলা ভাষাকে আরো আন্তরিক ও প্রাণবন্ত করে তুলেছে । এই পরিবর্তনের পিছনে যে যে কারণগুলি রয়েছে সেগুলি হল
স্থানাঙ্ক জ্যামিতি : দূরত্ব নির্ণয় ( Co-ordinate Geometry : Distance formula )
স্থানাঙ্ক জ্যামিতি : দূরত্ব নির্ণয় ( Co-ordinate Geometry : Distance formula )
সূচনা ( Introduction )
MCQ on Current Affairs 2019
1. Who was sworn in as the President of Venezuela on January 10, 2019 ? (A) Mr. Nicolas Maduro (B) Hugo Chavez (C) Rafael Caldera (D) Carlos Andres Perez 2. Who has been appointed as the Prime Minister of Taiwan on January 14, 2019 ? (A) Lin Chuan (B) Mr. Su Tseng-chang (C) Mao Chi-kuo (D) Chang San-cheng
পিথাগোরাসের উপপাদ্য ( Pythagoras Therorem )
পিথাগোরাসের উপপাদ্য ( Pythagoras Therorem )
পিথাগোরাসের উপপাদ্য :- কোনো সমকোণী ত্রিভুজের অতিভুজের ওপর অঙ্কি
Current Affairs for March 2019
The movie ‘Raazi’ won the 64th Filmfare Awards as Best Film on March 23, 2019 in Mumbai. Meghna Gulzar won the 64th Filmfare Award as the Best Director on March 23, 2019 in Mumbai.
WBCS Main Exam Compulsory Question Paper VI-2018 [Arithmetic and Test of Reasoning]
1. The ratio of Velocity of hour's hand and minute's hand at a clock is (A) 1 : 12 (B) 12 : 1 (C) 1 : 24 (D) 24 : 1 2. If a square and a rectangle having the same perimeter and their areas are S and R respectively then (A) S = R (B) S > R (C) S
WBCS Main Exam Compulsory Question Paper V -2018 [The Constitution of India and Indian Economy including role and functions of RBI]
1. Which among the following state has highest number of Export Oriented Units in India ? (A) Tamil Nadu (B) Maharashtra (C) Karnataka (D) Andhra Pradesh 2. The Tobin tax, initially suggested, by James Tobin was a tax on which among the following transactions ? (A) Property Transactions (B) Currency Transactions (C) Industrial Transactions (D) All of the above
WBCS Main Exam Compulsory Question Paper IV -2018 [General Studies-II]
1. Which is the most balanced diet ? (A) Rice (B) Milk (C) Meat (D) Fish 2. Carbohydrate stored in the body as (A) glucose (B) starch (C) glycogen (D) sucrose 3. Quinine is extracted from the plant of (A) Poppy (B) Cinchona (C) Sandle wood (D) Palm
WBCS Main Exam Compulsory Question Paper III - 2018 [General Studies-I]
1. 'Operation Flood' is associated with (A) Milk production (B) Wheat production (C) Flood control (D) Water harvesting 2. Which of the following are not grown in the Kharif season ? (A) Bajra and Rice (B) Maize and Jowar (C) Barley and Mustard (D) Jowar and Rice 3. The largest irrigated area in India is occupied by (A) Sugarcane (B) Rice (C) Cotton (D) Wheat
Current Affairs for January & February 2019
Vikram Misri was appointed as India's Ambassador to China . Mr. Misri replaced Mr. Gautam Bambawale who retired in November 2018.