Important SI Unit (System International) List Of SI मात्रक | All for Competitive Exams... - JANGIR ACADEMY

Important SI Unit (System International)

Dear Candidates, Thanks for the Visiting on this Page. हम यहाँ इस Post में आपको SI Unit के बारे में Short में जानकारी प्रदान कर रहे है, Exams में अक्सर इस Topic में से कुछ प्रश्न पूछ लिए जाते हैं। तो हम सलाह देते की इस topic को अपने Study Material में add करें और इनको अच्छी तरह याद करें। धन्यवाद !!!

आधार राशि	प्रतीक	वर्णन	SI मात्रक	बिमा का संकेत	टिप्पणी
Important SI Unit (System International)
लम्बाई	l	किसी वस्तु का एकविमिय विस्तार	मीटर (m)	L
द्रव्यमान	m	किसी वस्तु में द्रव्य (पदार्थ) की मात्रा	किलोग्राम (kg)	M	extensive
समय	t	किसी घटना की अवधि	सेकेंड (s)	T
विद्युत धारा	I	विद्युत आवेश के प्रवाह की दर	ampere (A)	I
तापमान	T	Average energy per degree of freedom of a system.	kelvin (K)	Θ	intensive
पदार्थ की मात्रा	n	Number of particles compared to the number of atoms in 0.012 kg of 12C.	मोल (mol)	N	extensive
ज्योती तीव्रता	L	Amount of energy emitted by a light source in a particular direction.	कैन्डेला (cd)	J

व्युत्पन्न मात्रक	चिह्न	विवरण	SI मात्रक	विमा	टिप्पणी
Heat flux density	ϕQ	Amount of heat flowing through a surface per unit area.	W m−2	M T−3
Angular speed (or angular velocity)	ω or ω	The angle incremented in a plane by a segment connecting an object and a reference point.	rad s−1	T−1	scalar or pseudovector
ठोस कोण	Ω	Measure of the size of an object as projected on a sphere.	स्टेरेडियन (sr)	1
Magnetic flux	Φ	Measure of quantity of magnetism, taking account of the strength and the extent of a magnetic field.	weber (Wb = kg m2 A−1s−2)	M L2 T−2 I−1	scalar
Mean lifetime	τ	Average time needed for a particle to decay.	s	T	intensive
Stress	σ	Amount of force exerted per surface area.	Pa	M L−1 T−2	2-tensor. (or scalar)
Electric charge density	ρQ	Amount of electric charge per unit volume.	C m−3	I T L−3	intensive
Linear density	ρl	Amount of mass per unit length of a one dimensional object.		M L−1
Energy density	ρE	Amount of energy per unit volume.	J m−3	M L−1 T−2	intensive
Area density	ρA	The amount of mass per unit area of a two dimensional object.	kg m−2	M L−2
(Mass) Density(volume density)	ρ	The amount of mass per unit volume of a three dimensional object.	kg m−3	M L−3	intensive
Permeability	μ	Measure for how the magnetization of material is affected by the application of an external magnetic field.	H m−1	M L−1 I−2	intensive
Chemical potential	μ	The amount of energy needed to add a particle to a system.	J mol−1	M L2 T−2 N−1	intensive
Wavelength	λ	Distance between repeating units of a propagating wave.	m	L
कोण	θ	Measure of a change in direction or orientation.	रेडियन	1
Dynamic Viscosity	η	Measure for the resistance of an incompressible fluid to stress.	Pa s	M L−1 T−1
Permittivity	ε	Measure for how the polarization of a material is affected by the application of an external electric field.	F m−1	I2 M−1 L−2 T4	intensive
Surface tension	γ	Amount of work needed to change the surface of a liquid by a unit surface area.	N m−1 or J m−2	M T−2
Angular acceleration	α	Rate of change in angular speed or velocity.	rad s−2	T−2
Impedance	Z	Measure for the resistance of an electrical circuit against an alternating current.	ohm (Ω = kg m2 A−2 s−3)	L2 M T−3 I−2	complex scalar
Mass fraction	x	Mass of a substance as a fraction of the total mass.	kg/kg	1	intensive
Work	W	Energy dissipated by a force moving over a distance, scalar product of the force and the movement vector.	joule (J = kg m2 s−2)	M L2 T−2	scalar
Weight	w	Amount of gravitation force exerted on an object.	newton (N = kg m s−2)	M L T−2
Volume	V	The three dimensional extent of an object.	m3	L3	extensive
Velocity	v	Speed of an object in a chosen direction.	m s−1	L T−1	vector
Speed	v	Rate of change of the position of an object.	m s−1	L T−1	scalar
Specific volume	v	The volume occupied by a unit mass of material (reciprocal of density)।	m3 kg−1	L3 M−1	intensive
Electric potential	V	The amount of work required to bring a unit charge into an electric field from infinity.	volt (V = kg m2 A−1 s−3)	L2 M T−3 I−1	scalar
Half-life	t1/2	The time needed for a quantity to decay to half its original value.	s	T
Torque (moment of force)	T	Product of a force and the perpendicular distance of the force from the point about which it is exerted.	N m	M L2 T−2	pseudovector
Spin	S	Intrinsic property of particles, roughly to be interpreted as the intrinsic angular momentumof the particle.	kg m2 s−1	M L2 T−1
Entropy	S	Measure for the amount of available states for a system.	J K−1	M L2 T−2 Θ−1	extensive, scalar
Reaction rate	r	Measure for speed of a chemical reaction.	mol m−3 s−1	N L−3 T−1	intensive
Electrical resistance	R	The degree to which an object opposes the passage of an electric current.	ohm (Ω = kg m2 A−2 s−3)	L2 M T−3 I−2	scalar
Heat	Q	Amount of energy transferred between systems due to temperature difference.	J	M L2 T−2
Electric Charge	Q	Amount of electric charge.	coulomb (C = A s)	I T	extensive, conserved quantity
Pressure	p	Amount of force per unit area.	pascal (Pa = kg m−1 s−2)	M L−1 T−2	intensive
Power	P	The rate of change in energy over time.	watt (W)	M L2 T−3	extensive
Momentum	p	Product of an object’s mass and velocity.	N s	M L T−1	vector, extensive
Impulse	p	The cause of a change in momentum, acting on an object.	kg m s−1	M L T−1	vector
Index of refraction	n	The factor by which the speed of light is reduce in a medium.		1	intensive
Magnetization	M	Amount of magnetic moment per unit volume.	A m−1	I L−1	vector field
Radiance	L	Power of emitted electromagnetic radiation per solid angle and per projected source area.	W m−2 sr−1	M T−3
Inductance	L	Measure for the amount of magnetic flux generated for a certain current run through a circuit.	henry (H = kg m2 A−2s−2)	M L2 T−2 I−2
Angular momentum	L	Measure of the extent and direction and object rotates about a reference point.	kg m2 s−1	M L2 T−1	conserved quantity, pseudovector
Wavenumber	k	Reciprocal of the wavelength.	m−1	L−1
Thermal conductivity	k	Measure for the ease with which a material conducts heat.	W m−1 K−1	M L−1 T−3 Θ−1	intensive
Current density	J	Amount of electric current flowing through a surface.	A m−2	I L−2
Radiant intensity	I	Power of emitted electromagnetic radiation per solid angle.	W sr−1	M L2 T−3	scalar
Moment of inertia	I	Inertia of an object with respect to angular acceleration.	kg m2	M L2	scalar
Magnetic field strength	H	Strength of a magnetic field in a material.	A m−1	I L−1	vector field
Dose equivalent	H	Measure for the received amount of radiation adjusted for the effect of different types of radiant on biological tissue.	sievert (Sv = m2 s−2)	L2 T−2
Electrical conductance	G	Meausure for how easily current flows through a material.	siemens (S = A2 s3 kg−1m−2)	L−2 M−1 T3 I2	scalar
*Luminous flux (or luminous power)*	F	Perceived power of a light source.	lumen (lm = cd sr)	J
Frequency	f	The number of times something happens in a period of time.	hertz (Hz =s−1)	T−1
Force	F	The cause of acceleration, acting on an object.	newton (N = kg m s−2)	M L T−2	vector
Illuminance	Ev	Total luminous flux incident to a surface per unit area.	lux (lx = cd sr m−2)	J L−2
Irradiance	E	Power of electromagnetic radiation flowing through a surface per unit area.	W m−2	M T−2
Energy	E	The capacity of a body or system to do work.	joule (J = kg m2 s−2)	M L2 T−2	extensive, scalar, conserved quantity
Electric field strength	E	Strength of the electric field.	V m−1	M I−1 L2 T−3	vector field
Electric displacement	D	Strength of the electric displacement.	C m−2	I T L−2	vector field
(Radioactive) Dose	D	Amount of energy absorbed by biological tissue from ionizing radiation per unit mass.	gray (unit) (Gy = m2 s−2)	L2 T−2
Heat capacity	Cp	Amount of energy needed to raise the temperature of a system by one degree.	J K−1	M L2 T−2 Θ−1	extensive
Specific heat capacity	c	Heat capacity per unit mass.	J kg−1 K−1	L2 T−2 Θ−1	intensive
Molar heat capacity	c	Heat capacity of a material per unit amount of substance.	J K−1 mol−1	M L2 T−2 N−1	intensive
Molar concentration	C	Amount of substance per unit volume.	mol m−3	N L−3	intensive
Capacitance	C	Measure for the amount of stored charge for a given potential.	farad (F = A2 s4 kg−1m−2)	I2 T4 M−1 L−2
Magnetic flux density	B	Measure for the strength of the magnetic field.	tesla (T = kg A−1 s−2)	M T−2 I−1	pseudovector field
Area	A	The two dimensional extent of an object.	m2	L2
Acceleration	a	Rate of change of the speed or velocity of an object.	m s−2	L T−2	scalar or vector
(Radioactive) Activity	A	Number of particles decaying per unit time.	becquerel (Bq = s−1)	T−1	extensive
Specific energy		Amount of energy present per unit mass.	J kg−1	L2 T−2	intensive
Molar entropy		Amount of entropy present in a system per unit amount of substance.	J K−1 mol−1	M L2 T−2 Θ−1 N−1	intensive
Molar energy		Amount of energy present is a system per unit amount of substance.	J mol−1	M L2 T−2 N−1	intensive
Catalytic activity concentration		Change in reaction rate due to presence of a catalyst per unit volume of the system.	kat m−3	N L−3 T−1
Catalytic activity		Change in reaction rate due to presence of a catalyst.	katal (kat = mol s−1)	N T−1
Absorbed dose rate		Absorbed dose received per unit of time.	Gy s−1	L2 T−3

हम उम्मीद करते है कि आपको हमारी POST पसंद आई होगी ...