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- Time
- Space (or length)
- Mass
- Temperature
- Electrical current
- Luminosity
- Amount of matter
A fundamental quantity is an irreducible "thing". It cannot be described in terms of other "things". This is in contrast to derived quantities, which can be described in terms of other "things". Fundamental quantities are also called base quantities
Fundamental quantities can be considered to be dimensions, but in a loose context. In physics, when we refer to dimensions, we usually refer to space and time (and theoretically higher similar dimensions), and not the dimension of the luminosity (see below).
Each fundamental quantity has an associated unit in the SI system:
- Time: seconds (s)
- Space: meters (m)
- Mass: kilograms (kg)
- Temperature: degrees kelvin (K)
- Electrical current: ampere (A)
- Luminosity: candela (l)
- Amount of matter: mole
There are no such things as SI 'derived units'; the correct term is 'base units'.
What else can I help you with?
Why current a fundamental quantity though it is flow of charge per unit time?
Ampere = Coloumb / second is the same as saying that Coloumb = Ampere x second. Any of the two electrical units can be derived from the other one. Ampere is NOT a "fundamental quantity"; it is an SI base unit. The base units are not necessarily those that are somehow considered more "fundamental" than others; instead, the base units are those that can be measured with a great accuracy. In the case of current vs. charge, it seems that measuring a current can be done with greater accuracy than measuring a charge directly; therefore, the current is the base unit, and the current is derived. However, this doesn't make current any more "fundamental" than charge.
A unit of measure made of a combination of two or more base units is called?
derived
What is magnetic flux measured in?
The SI unit of magnetic flux is the weber (in derived units: volt-seconds)
What is the measure of coulomb?
The coulomb is an SI derived unit used to measure electric charge. It is a special name given to an 'ampere second', which are both SI base units.
What is the Definition for ohms?
Ohm is the unit for electrical resistance. The definition is given by Ohm's Law: resistance = voltage / current; in SI units: ohms = volts / amperes. For example, a resistance of 1 ohm would result in 1 ampere of current for every volt applied.
The units derived from fundamental units are called?
Those are called derived units.
What are combination of fundamental units called?
derived units
Why are derived units more complex than fundamental units?
Derived units is obtained from a combination of fundamental units. Derived unit is a cubic centimeter or a cube that is a centimeter on each side.
Is FT a fundamental or derived unit?
FT is a derived unit and not a fundamental unit. The fundamental unit cannot be broken down into different forms. The derived units on the other hand are made up of the fundamental units.
What are the two kinds of units?
They can be classified into fundamental units and derived units.
Definition for fundamental quantities and derived quantities?
the differentiate between fundamental quantity and derived quantity?
Mention differences between fundamental and derived units?
The fundamental units are based on specific standards for each unit. Derived units result from manipulating the fundamental units. For example, the SI unit for distance or length is the meter, and the SI unit for time is the second. If you divide meters by seconds, you get m/s, a derived unit for speed or velocity.
How are fundamental units and derived units related?
According to second law of Newton's motion, we can relate fundamental and derived units; i.e F=ma where, 'm' is mass of body which is fundamental quantity and its unit expressed in Kg. and 'F' is the force implied on body produced acceleration which is directly proportonal to one another, whereas; force is derived quantity and its unit expressed in Kg-m/sec/sec or N. Hence in this way we can relate these two.
Why are derived units more complex than fundamental units and why is it important to know whether a unit is derived or fundamental?
Derived units are simply more complex because they are made up of several (that is, usually, by more than one) base unit. It is just the way they are defined; for example, in the SI, distance and time are base units, while speed is a derived unit (distance / time). You can just as well invent a system of units where - for example - time and speed are base units; in this case, distance would be a derived unit.
What are the basic units by which all others are derived?
fundamental
Is mile a fundamental or derived unit?
icecream is honestly the best thing in the world, and it is a fundamental unit
Is velocity a derived unit?
No, velocity is not a derived unit. It is a fundamental physical quantity that measures the rate of change of an object's position with respect to time. Velocity is derived from the fundamental units of length and time.
