Explore topic-wise InterviewSolutions in Current Affairs.

It INDICATES the EXTENT to which the READING are RELIABLE.

It indicates the extent to which the reading are reliable.

The magnitude of the DIFFERENCE between the true value ( i.e. the MEAN )of the QUANTITY and the individual measured value is CALLED absolute ERROR.

The magnitude of the difference between the true value ( i.e. the mean )of the quantity and the individual measured value is called absolute error.

The error which creeps in during a measurement due to LIMIT or RESOLUTION of the MEASURING INSTRUMENT is CALLED instrumental error. 

The error which creeps in during a measurement due to limit or resolution of the measuring instrument is called instrumental error. 

The ERROR which creeps in during a measurement due to individual measuring person and the care taken by him in the measuring PROCESS is CALLED random error. In order to MINIMISE this error, measurements are repeated MANY times.

The error which creeps in during a measurement due to individual measuring person and the care taken by him in the measuring process is called random error. In order to minimise this error, measurements are repeated many times.

ACCORDING to this PRINCIPLE, the dimensions of all the terms on the two sides of an equation must be same.Therefore in a given relation the terms on EITHER SIDE have same dimensions, If the relation is a CORRECT one, but if it is not so, th erelation is not correct

According to this principle, the dimensions of all the terms on the two sides of an equation must be same.Therefore in a given relation the terms on either side have same dimensions, If the relation is a correct one, but if it is not so, th erelation is not correct

It is a term USED for lumber that is FINISHED and cut to standerdized width and DEPTH SPECIFIED in INCHES.

It is a term used for lumber that is finished and cut to standerdized width and depth specified in inches.

Physical quantities which are VARIABLE but have no dimensions are called NON - dimensional variable,

Example: strain, SPECIFIC gravity, angle ETC.

Physical quantities which are variable but have no dimensions are called non - dimensional variable,

Example: strain, specific gravity, angle etc.

It is an expression which expresses the PHYSICAL quantity in terms of a FUNDAMENTAL UNITS of mass, length and TIME.

It is an expression which expresses the physical quantity in terms of a fundamental units of mass, length and time.

It is an compound expression, SHOWING how and which of the FUNDAMENTAL units enter into the unit of a PHYSICAL quantity.

It is an compound expression, showing how and which of the fundamental units enter into the unit of a physical quantity.

We know that that the units that depend upon the FUNDAMENTAL units of mass, length and time are CALLED derived units. The UNIT of mass, length and time are denoted by M, I and T. ( The dimensions of a derived unit may be defined as the POWERS to which the fundamental units of mass, length and time must be raised so as to COMPLETELY represent it.

We know that that the units that depend upon the fundamental units of mass, length and time are called derived units. The unit of mass, length and time are denoted by M, I and T. ( The dimensions of a derived unit may be defined as the powers to which the fundamental units of mass, length and time must be raised so as to completely represent it.

Limitations of Dimensional Analysis are:

• It cannot determine value of DIMENSIONLESS constants.
• We cannot use this method to equations involving EXPONENTIAL and trigonometric FUNCTIONS.
• It cannot be applied to an EQUATION involving more than three physical quantities.
• It is a too not a SOLUTION i.e. It can check only if the equation is dimensionally correct or not. But cannot say the equation is absolutely correct.

Limitations of Dimensional Analysis are:

The applications of dimensional analysis are:

• To convert a physical quantity from one SYSTEM of units to another.
• To check the dimensional CORRECTNESS of a given EQUATION.establish a relationship between DIFFERENT physical QUANTITIES in an equation.

The applications of dimensional analysis are:

• Length – L
• Time – T
• MASS – M
• TEMPERATURE – K or θ
• CURRENT – A

The principle of homogeneity of dimensions STATES that an EQUATION is dimensionally correct if the dimensions of the various terms on either side of the equation are the same.
This principle is based on the fact that two quantities of the same dimension only can be ADDED up, and the resulting quantity ALSO possess the the same dimension.

in equation X + Y = Z is VALID if the dimensions of X, Y and Z are same.

The principle of homogeneity of dimensions states that an equation is dimensionally correct if the dimensions of the various terms on either side of the equation are the same.
This principle is based on the fact that two quantities of the same dimension only can be added up, and the resulting quantity also possess the the same dimension.

in equation X + Y = Z is valid if the dimensions of X, Y and Z are same.

PHYSICAL quantities which do not POSSESS dimensions are called dimensionless quantities.

EXAMPLE: ANGLE, specific gravity, strain. In general, physical quantity which is a ratio of two quantities of same dimension will be dimensionless.

Physical quantities which do not possess dimensions are called dimensionless quantities.

Example: Angle, specific gravity, strain. In general, physical quantity which is a ratio of two quantities of same dimension will be dimensionless.

Those PHYSICAL quantities which possess dimensions but do not have a fixed value are CALLED dimensional VARIABLES.

Example: Displacement, Force, velocity ETC.

Those physical quantities which possess dimensions but do not have a fixed value are called dimensional variables.

Example: Displacement, Force, velocity etc.

CONSTANTS which POSSESS dimensions are called dimensional constants.

Example: PLANCK’ CONSTANT.

Constants which possess dimensions are called dimensional constants.

Example: Planck’ Constant.

The term ‘DIMENSION’ is used to REFER to the physical NATURE of a quantity and the type of unit used to SPECIFY it. Mathematically dimensions of a physical quantity are the powers to which the fundamental quantities must be RAISED.

The term ‘dimension’ is used to refer to the physical nature of a quantity and the type of unit used to specify it. Mathematically dimensions of a physical quantity are the powers to which the fundamental quantities must be raised.