Kinds of units - class-XI
Description: kinds of units | |
Number of Questions: 53 | |
Created by: Ashok Pandey | |
Tags: measurement of physical quantities measurements nature of the physical world and measurement measurements and units physics physical world and measurement measurement measurements and experimentation units and measurement |
The SI unit of specific latent heat is
The specific heat capacity of water in SI unit is :
The SI unit of thermal capacity is ;
Potential is measured in
Name the physical quantity related to the following unit : watt.
Name the physical quantity related to the following unit : pascal.
Column I gives three physical quantities. Select the appropriate units for these from the choices given in column II. Some of the physical quantities may have more than one choice.
Column-I | Column - II |
---|---|
a) Capacitance | d) Ohm second |
b) Inductance | e) Coulomb$^{2}$ joule$^{ -1 }$ |
c) Magnetic induction | f) Coulomb volt$^{ -1 }$ |
g) Newton (ampere/metre)$^{ -1 }$ | |
h) Volt second (ampere)$^{ -1 }$ |
The SI unit of magnetic permeability is
$\left( Coulomb \right) ^{ 2 }{ J }^{ -1 }$ can be the unit of :
joule is the unit of
How many fundamental units are present in the SI system of units?
The units which can neither derived from one another nor resolved into any thing more basic are called
One second is defined to be equal to:
Which of the following are dimensionless quantities,(symbols have their usual meaning)
[$\eta$=viscocity,$\rho$=density,$r$=radius,$k$=thermal conductivity,$c$=heat capacity.]
Which of the following is dimensionally correct? ($\rho$=density,$\eta$=coefficient of viscosity,$P$=pressure,$S$=surface tension,$r$=radius,$g$=gravitational constant)
Consider the following equation which gives a hypothetical physical quantity mutual dynamic constant $\psi$ as,
$\dfrac{2Scos\theta}{\rho \times rg}$+$\dfrac{1}{2\pi}\dfrac{mgl}{I}$
($I$=moment of inertia ,$S$=surface tension,others symbol have usual meanings)
Which of the following is not the fundamental quantity,
The most basic rule of dimensional analysis is that of dimensional homogeneity. Only commensurable quantities may be
Light year is a unit of:
Which one can be represented as the symbol of time?
The unit of electric field intensity is:
Among the following indentify the derived quantities.
The energy which an electron acquires when accelerated, through a potential difference of $1$ volt is called
The Sl unit of length is the meter. Suppose we adopt a new unit of length which equals to $x$ meters. The area 1 $m ^ { 2 }$ expressed in terms of the new unit has a magnitude:
The impulse $J$ required to bring it to rest when it reaches the vertical position.
If $10 ^ { 7 }$ era is taken as unit of energy, $10 ^ { 5 }$ dyne as the unit of force, one second as unit of time. what is, the unit of length?
The following quantities which have same directions :
The MKS unit of quantity $\dfrac{\pi \eta r^4}{2}$ is :
In S.l. system the value of $\epsilon _ { 0 }$
Unit of self inductance is
If $\epsilon ,\phi $ and t stand for permittivity,electric flux and time respectively, then dimensions of $ \epsilon \cfrac{d \phi}{dt}$ is same as that
Which of the following pairs is not matched?
kilowatt-hour is the unit of ____.
Oersted is the unit of
The SI unit of pressure is
The damping force on an oscillator is directly proportional to the velocity. The units of constant of proportionality are
The unit of permittivity of free space, $ \varepsilon _ o $ is
In $S = a + bt + ct^{2}, S$ is measured in metres and $t$ is seconds. The unit of $c$ is
If the volume of a cube is equal to its surface area in magnitude. Then the volume of the cube is?
In the eqn. $\left (P+\dfrac {a}{V^2}\right )(V-b)=$ constant, the unit of $a$ is
Unit of specific resistance is
Which of the following is different from others?
Mass is a _________ physical quantity.
Which of the following physical quantity is different form others ?
Write the SI unit of the physical quantity having following dimensional formula
$\displaystyle [{ M }^{ 0 }{ L }^{ 2 }{ T }^{ -2 }{ K }^{ -1 }]$.
Dimensional analysis is the analysis of the relationships between different physical quantities by
Which one of the following is not a fundamental SI unit?
A dimensionless quantity
Some physical quantities are given in Column I and some possible SI units in which these quantities may be expressed are given in Column II. Match the physical quantities in Column I with the units in Column II.
Column I | Column II |
---|---|
i. $GM _eM _s$ | a. (volt) (coulomb) (metre) |
ii. $3RT/M$ | b. $(kilogram)(metre)^3 (second)^2$ |
iii. $F^2/q^2B^2$ | c. $(meter)^2 (second)^{-2}$ |
iv. $GM _e/R _e$ | d. $(farad) (volt)^2 (kg)^{-1}$ |
where G is universal gravitational constant; $M _e$ mass of the earth; $M _s$, mass of sun; $R _e$ radius of the earth; R, universal gas constant;T, absolute temperature; M, molar mass, F, force; q, charge; B, magnetic field.
Pressure (P), density $\displaystyle (\rho )$ and velocity (V) be taken as fundamental quantities for dimensional analysis.