RSMSSB JE Exam flashcards

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

Thar Desert share of Rajasthan

The Thar (Marusthali) covers roughly 61 percent of Rajasthan's area, dominating the western districts, while the Aravalli range separates this arid zone from the more humid eastern plains.

Luni River special feature

The Luni is the only major river draining the Thar basin. It rises near Ajmer in the Aravallis, flows southwest past Jodhpur and Barmer, and finally disappears into the Rann of Kutch marshes.

Keoladeo Ghana National Park

A Ramsar and UNESCO World Heritage wetland at Bharatpur, Rajasthan, famous as a wintering ground for migratory birds including the Siberian crane, and formerly a royal duck-shooting reserve.

Sambhar Lake significance

India's largest inland saline lake, located west of Jaipur in Rajasthan, historically a major source of common salt and now also an important Ramsar-listed habitat for flamingos.

Fundamental Rights location

Fundamental Rights are contained in Part III of the Indian Constitution, Articles 12 to 35, and are enforceable through writs under Article 32 before the Supreme Court.

Bretton Woods twins

The IMF and the World Bank were both created at the 1944 Bretton Woods conference. The IMF manages balance-of-payments stability, while the World Bank funds development lending.

Chandrayaan-3 landing site name

India's Chandrayaan-3 mission soft-landed the Vikram lander near the lunar south pole in August 2023, making India the first country to achieve a landing in that region.

Newtons third law caution

Action and reaction forces are equal and opposite but act on two different bodies. They therefore never cancel each other, which is why a body can still accelerate under such a pair.

Ohms law statement

At constant temperature, current through a conductor is directly proportional to the potential difference across it, giving V = IR, where R is resistance measured in ohms.

Mitochondria function

Mitochondria are double-membraned organelles that carry out aerobic respiration, oxidising glucose to release ATP, and are therefore called the powerhouse of the cell.

pH scale meaning

pH measures hydrogen ion concentration as the negative logarithm of activity. Values below 7 indicate acidic solutions, above 7 basic, and exactly 7 neutral at standard temperature.

Quadratic sum and product

For ax² + bx + c = 0 with a not zero, the roots satisfy sum = -b/a and product = c/a. The discriminant b² - 4ac decides whether roots are real or complex.

Average speed equal distances

When two equal distances are covered at speeds x and y, the average speed for the whole journey is the harmonic mean 2xy/(x+y), not the arithmetic mean (x+y)/2.

Successive discount formula

Two successive discounts of a percent and b percent are equivalent to a single discount of a + b - ab/100 percent, which is always less than a + b.

Sphere volume and surface

A sphere of radius r has volume (4/3)πr³ and total surface area 4πr². A hemisphere adds the flat circular face, giving 3πr² total surface.

Clock hand angle formula

The angle between the hour and minute hands at H hours and M minutes is |30H - 5.5M| degrees. If the result exceeds 180, subtract it from 360 for the smaller angle.

Syllogism validity rule

A syllogistic conclusion is valid only if it holds in every possible Venn diagram consistent with the premises. One counterexample diagram makes the conclusion invalid.

Circular seating left-right rule

When people face the centre of a circle, a person's left is clockwise and right is anticlockwise. When they face outward, left and right are reversed.

Leap year weekday shift

A normal year has 365 days, one more than 52 weeks, so the next year's same date shifts by one weekday. A leap year of 366 days shifts it by two.

Volatile versus non-volatile memory

RAM is volatile: its contents vanish when power is removed. ROM, flash storage and hard disks are non-volatile, retaining data without a continuous power supply.

DNS role

The Domain Name System translates human-readable domain names such as example.com into numeric IP addresses that computers use to route packets across networks.

Trojan horse definition

A trojan is malware disguised as legitimate or useful software. Unlike a worm, it does not self-replicate, relying instead on the user installing and running it.

IPv4 versus IPv6 length

An IPv4 address is 32 bits, usually written as four dotted decimal octets. An IPv6 address is 128 bits, written as eight hexadecimal groups separated by colons.

तत्पुरुष समास पहचान

तत्पुरुष समास में अंतिम पद प्रधान होता है और विभक्ति चिह्न लुप्त रहता है। जैसे 'राजपुत्र' का अर्थ राजा का पुत्र, जहाँ पुत्र मुख्य है।

मुहावरा अंधे की लाठी

इस मुहावरे का अर्थ है एकमात्र सहारा या भरोसे का एकमात्र व्यक्ति। इसका प्रयोग तब होता है जब किसी के पास कोई दूसरा विकल्प न हो।

Present perfect tense use

The present perfect (has/have plus past participle) links a past action to the present, expressing completed work with current relevance, or an action continuing up to now.

Passive voice formation

To change active to passive, make the object the subject, use the correct form of be with the past participle, and add the agent after 'by'. Only transitive verbs allow this.

Youngs modulus definition

Within the elastic limit, Young's modulus E equals tensile stress divided by tensile strain. A higher E means the material is stiffer and deforms less under the same stress.

Simply supported beam central load

For a simply supported beam of span L carrying a point load W at midspan, each reaction is W/2 and the maximum bending moment at the centre is WL/4.

Nominal concrete mix M20

M20 concrete uses a nominal volume ratio of 1 part cement to 1.5 parts fine aggregate to 3 parts coarse aggregate, and denotes characteristic strength of 20 N/mm² at 28 days.

Parallel resistor formula

For two resistors R1 and R2 in parallel, the equivalent resistance is R1R2/(R1+R2), which is always smaller than the smaller of the two individual resistances.

Carnot efficiency expression

A reversible heat engine operating between hot reservoir T_hot and cold reservoir T_cold, both in kelvin, has maximum efficiency 1 minus T_cold/T_hot. No real engine exceeds this.

Rhizobium nitrogen fixation

Rhizobium bacteria live in root nodules of leguminous plants such as gram and pea, converting atmospheric nitrogen into usable ammonia compounds, which enriches soil nitrogen naturally.