RVUNL JE flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Slip of induction motor

The fractional difference between synchronous speed and actual rotor speed, s = (Ns − Nr)/Ns; slip is 1 at standstill and near zero at no load.

Transformer EMF equation

RMS induced EMF per winding equals 4.44 times frequency times turns times peak flux. It explains why raising frequency or turns raises voltage.

Carnot efficiency

The maximum possible efficiency of a heat engine between two reservoirs, equal to one minus the ratio of absolute sink temperature to source temperature.

Euler buckling load

Critical axial load at which a slender column buckles, given by pi-squared times modulus times moment of inertia divided by effective length squared.

Gauge factor

Ratio of fractional change in resistance to fractional change in length of a strain gauge; a measure of sensitivity, typically about two for metal gauges.

Shaft power formula

Rotational power equals two pi times speed in revolutions per second times torque in newton-metres, used to size motors and shafts.

Velocity ratio of gears

The ratio of the product of driven gear teeth to the product of driver gear teeth; determines output speed relative to input speed.

Overall efficiency chain

When energy passes through several stages, overall efficiency is the product of individual stage efficiencies, always lower than the weakest stage.

Two parallel resistors

The equivalent resistance of two resistors in parallel equals their product divided by their sum; always smaller than the smaller resistor.

Rajasthan Day

Celebrated on 30 March, marking the formation of Greater Rajasthan in 1949 when Jaipur became the capital of the unified state.

Chambal river

A perennial river rising in the Janapav hills, flowing through Rajasthan and joining the Yamuna; known for deep ravines and hydro projects.

Rawatbhata

Site in Chittorgarh district of the Rajasthan Atomic Power Station, the state's principal nuclear power facility operated by NPCIL.

Article 32

Grants the right to move the Supreme Court for enforcement of Fundamental Rights; called the heart and soul of the Constitution by Dr. Ambedkar.

Basic structure doctrine

Judicial principle from Kesavananda Bharati that Parliament cannot amend the Constitution so as to destroy its essential features.

Money Bill

A bill dealing only with taxes, borrowing or Consolidated Fund matters, defined in Article 110 and introduced only in the Lok Sabha.

73rd Amendment

Constitutional amendment of 1992 giving Panchayati Raj institutions constitutional status, mandating three tiers and five-yearly elections.

Battle of Haldighati

Fought in 1576 between Maharana Pratap of Mewar and Mughal forces led by Man Singh; remembered for Rajput resistance though Mughals held the field.

Phad painting

A long scroll painting tradition of Rajasthan depicting folk deities such as Pabuji and Devnarayan, sung and narrated by Bhopa performers.

Guru Shikhar

The highest peak of the Aravalli range at about 1,722 metres, located on Mount Abu in Sirohi district of Rajasthan.

Sambhar Lake

Rajasthan's largest inland saline lake, near Jaipur, a major source of salt and a Ramsar wetland attracting migratory birds.

Tropic of Cancer

Latitude of about 23.5 degrees north passing through eight Indian states, dividing the country into roughly equal northern and southern halves.

Mirror formula

Relates focal length, image distance and object distance for spherical mirrors: one over f equals one over v plus one over u, with sign convention.

Avogadro number

The number of particles in one mole of a substance, approximately 6.022 times ten to the power twenty-three; links mass to particle count.

Universal donor

Blood group O negative, which lacks A, B and Rh antigens and can therefore be transfused to recipients of nearly any blood group.

Compound interest

Interest computed on principal plus accumulated interest; for principal P, rate R and time T it equals P times (1 + R/100) to the power T minus P.

Alligation rule

A method of mixtures giving the ratio of two components as the differences between their values and the mean value, arranged crosswise.

Equal-distance average speed

When equal distances are covered at speeds v1 and v2, average speed is twice their product divided by their sum, not the arithmetic mean.

Blood relation tree

A diagram linking family members with standard symbols; used to trace relationships, noting that maternal refers to the mother's side.

Clock hand gain

The minute hand gains 5.5 degrees per minute over the hour hand, so the hands coincide eleven times in every twelve-hour cycle.

Odd days in a year

Days left after dividing total days by seven; an ordinary year has one odd day and a leap year has two, used in calendar problems.

दीर्घ संधि

स्वर संधि का भेद जिसमें ह्रस्व या दीर्घ सवर्ण स्वर मिलकर दीर्घ हो जाते हैं, जैसे विद्या + आलय = विद्यालय।

अनुप्रास अलंकार

शब्दालंकार का भेद जिसमें एक ही वर्ण की आवृत्ति बार-बार होती है, जैसे चारु चंद्र की चंचल किरणें में च का प्रयोग।