BTEB Polytechnic Admission key terms

A measure of how fast a function's output changes when its input changes slightly, found as the slope of the tangent line at a point.

The value that a function's output approaches as the input gets closer and closer to some chosen number, without necessarily reaching it.

The accumulated total of a function over an interval, interpreted geometrically as the signed area between the curve and the horizontal axis.

A property of a function whose graph has no breaks, jumps, or holes at a point, meaning the limit there equals the function's actual value.

A rectangular arrangement of numbers in rows and columns that can be added, multiplied, or transformed according to fixed algebraic rules.

A single number computed from a square matrix that shows whether the matrix has an inverse and how it scales areas or volumes.

A quantity having both magnitude and direction, often drawn as an arrow and added by placing arrows head to tail.

An ordered arrangement of selected items in which the sequence matters, so rearranging the same items produces a different result.

A selection of items from a group where order is ignored, so choosing the same items in a different sequence counts as one outcome.

A number between zero and one expressing how likely an event is, calculated as favourable outcomes divided by total equally likely outcomes.

A quantity described by magnitude alone, such as mass, temperature, or speed, with no direction attached to it.

The rate at which displacement changes with time, a vector quantity that includes direction as well as how fast an object moves.

The rate at which velocity changes with time, produced whenever speed increases or decreases or the direction of motion alters.

The rule stating that the net force on a body equals its mass multiplied by the acceleration it produces, written as F equals ma.

Any push or pull that can change an object's state of rest or motion, measured in newtons and having both size and direction.

Energy transferred when a force moves an object along a path, calculated as force times displacement times the cosine of the angle between them.

The rate at which work is done or energy is transferred, measured in watts, where one watt equals one joule per second.

The capacity of a system to do work, existing in forms such as kinetic, potential, chemical, and thermal, and conserved in isolated systems.

The relationship stating that current through a conductor equals the voltage across it divided by its resistance, valid at constant temperature.

The opposition a material offers to the flow of electric current, measured in ohms and depending on length, area, and material.

The rate at which electric charge flows past a point in a circuit, measured in amperes, where one ampere is one coulomb per second.

The amount of a substance containing exactly the number of elementary particles equal to Avogadro's number, about 6.022 times ten to the twenty-third.

The mass of one mole of a substance in grams, numerically equal to its formula mass expressed in atomic mass units.

The calculation of quantitative relationships between reactants and products in a balanced chemical equation using mole ratios.

A logarithmic scale from zero to fourteen describing how acidic or basic a solution is, based on the concentration of hydrogen ions.

A substance that donates hydrogen ions or accepts electron pairs, turning blue litmus red and reacting with bases to form salts.

A substance that accepts hydrogen ions or donates electron pairs, turning red litmus blue and neutralising acids to produce salt and water.

A chemical change in which a substance loses electrons, often by gaining oxygen or losing hydrogen, raising its oxidation number.

A chemical change in which a substance gains electrons, often by losing oxygen or gaining hydrogen, lowering its oxidation number.

One of two or more compounds sharing the same molecular formula but differing in how their atoms are arranged or connected.

The grammar rule requiring a verb to match its subject in number, so a singular subject takes a singular verb and plurals pair together.

The grammatical form of a verb that locates an action or state in time, such as present, past, or future.

The form of a verb showing whether the subject performs the action, as in active voice, or receives it, as in passive voice.

A group of words containing its own subject and verb, which may stand alone as a sentence or depend on another clause.

A word such as in, on, between, or despite that links a noun or pronoun to another part of the sentence, showing relation.

দুই বা ততোধিক ধ্বনি পাশাপাশি এলে নির্দিষ্ট নিয়মে মিলিত হয়ে যে নতুন রূপ তৈরি হয়, তাকে সন্ধি বলে। যেমন বিদ্যা ও আলয় মিলে বিদ্যালয়।

একাধিক পদের অর্থ সংক্ষেপ করে একটি নতুন পদে প্রকাশ করার প্রক্রিয়া; যেমন দেশের সেবা অর্থে দেশসেবা।

বাক্যের ক্রিয়ার সঙ্গে বিশেষ্যের যে সম্পর্ক বা ভূমিকা নির্দেশ করে, যেমন কর্তৃকারক, কর্মকারক ও অপাদানকারক।