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Recent questions tagged units-and-measurement
Questions
Suppose we are told that the acceleration $A$ of a particle moving with uniform speed $v$ in a circle of radius $r$ is proportional to some power of r, say $r^n$, and some power of v, say $v^m$. Which of the following is the simplest form of an equation for the acceleration?
jeemain
physics
class11
ch2
units-and-measurement
medium
dimensional-formulae-and-analysis
asked
Mar 23, 2014
by
balaji.thirumalai
1
answer
A physical quantity $P$ is related to four observables $a,b,c$ and $d$ as follows $P=\large\frac{\large a^3b^2}{(\sqrt {cd})}$. The percentage error in measuring $a,b,c,d$ are $1 \%,3 \%,4 \%$ and $2 \%$ respectively. What is percentage error in calculation of $P$
jeemain
physics
class11
ch2
units-and-measurement
medium
accuracy-precision-and-errors-in-measurement
asked
Mar 23, 2014
by
balaji.thirumalai
1
answer
Value of acceleration due to gravity is $ 9.8 m/s^2$. Find its value in $km/hr^2$
jeemain
physics
class11
ch2
units-and-measurement
q50
medium
measurement-of-length-mass-time
asked
Jun 19, 2013
by
meena.p
1
answer
Resistance of metal is given by $R=\large\frac{V}{I}$. $V$ is potential difference, $I$ is current. In a circuit $V=(8 \pm 0.5)v$ and current is $I=(2 \pm 0.2)A$. what is value of resistance with percentage error?
jeemain
physics
class11
ch2
units-and-measurement
q48
easy
mock
accuracy-precision-and-errors-in-measurement
asked
Jun 19, 2013
by
meena.p
1
answer
The dimensions of electrical resistance is
jeemain
physics
class11
ch2
units-and-measurement
q49
easy
dimensional-formulae-and-analysis
asked
Jun 19, 2013
by
meena.p
1
answer
The laser light beamed towards moon from earth takes $2.56s$ to return after reflection at moon's surface. How much is the radius of lunar orbit around earth?
jeemain
physics
class11
ch2
units-and-measurement
q47
easy
measurement-of-length-mass-time
asked
Jun 19, 2013
by
meena.p
1
answer
To find the value of $g$ using simple pendulum $T=2.00 sec,\;l=50cm.$ was measured. The maximum possible errors in $g$ is (Error in $T$=0.01 sec,$l$=0.1 cm)
jeemain
physics
class11
ch2
units-and-measurement
q46
easy
accuracy-precision-and-errors-in-measurement
cbse11
ch1
asked
Jun 19, 2013
by
meena.p
1
answer
Heat generated in a circuit is given by $H=I^2Rt$, $I$ is current $R$ is resistance, $t$ is time. If percentage error in measuring $I$, $R$ and $t$ are $2 \%,1\%$ and $1\%$ respectively. what is the maximum error in measuring heat
jeemain
physics
class11
ch2
units-and-measurement
q45
easy
accuracy-precision-and-errors-in-measurement
asked
Jun 19, 2013
by
meena.p
1
answer
Find the dimension of physical quantity $X$ in the equation $Force=\large\frac{X}{Density}$
jeemain
physics
class11
ch2
units-and-measurement
q44
easy
dimensional-formulae-and-analysis
cbse11
ch1
asked
Jun 19, 2013
by
meena.p
2
answers
The following equation describe the motion of object where $x$ is displacement, $v,v_0$ are velocities, $m$ mass $V=Axe^{Bm}-\large\frac{c^2}{v^0}$. What must be the unit of $A$ and $B$?
jeemain
physics
class11
ch2
units-and-measurement
q43
easy
international-system-of-units
asked
Jun 18, 2013
by
meena.p
1
answer
The kinetic energy of rotation k depends on angular momentum J and moment of inertia I.The expression for kinetic energy is ( where c is a constant )
jeemain
physics
class11
ch2
units-and-measurement
q42
easy
dimensional-formulae-and-analysis
asked
Jun 18, 2013
by
meena.p
1
answer
Curie is a unit of
jeemain
physics
class11
ch2
units-and-measurement
q41
easy
international-system-of-units
asked
Jun 18, 2013
by
meena.p
1
answer
In an experiment the angles are measured using an instrument where $29$ divisions of main scale exactly coincide with $30$ division of vernier scale.If the smallest division in main scale is half a degree, then the least count of the instrument is
jeemain
physics
class11
ch2
units-and-measurement
q40
medium
accuracy-precision-and-errors-in-measurement
asked
Jun 18, 2013
by
meena.p
1
answer
The caesium clock are capable of measuring time with an accuracy of $1$ part in $10^{11}$. If two such clock run for $100$ years, find the difference in time shown by the clock
jeemain
physics
class11
ch2
units-and-measurement
q39
medium
accuracy-precision-and-errors-in-measurement
asked
Jun 18, 2013
by
meena.p
1
answer
The volume of a cube is $1.83 \;cm^3$. Find the volume of $25$ such identical cubes to correct number of significant figures.
jeemain
physics
class11
ch2
units-and-measurement
q38
easy
significant-figure
asked
Jun 18, 2013
by
meena.p
1
answer
Dimensional analysis of equation (velocity)$^x$=(pressure difference)$^{\Large\frac{3}{2}}$(density)$^{\Large\frac{-3}{2}}$ give values of $x$ to be
jeemain
physics
class11
ch2
units-and-measurement
q37
easy
dimensional-formulae-and-analysis
asked
Jun 18, 2013
by
meena.p
1
answer
If pressure $P$, velocity $V$ and $T$ are taken as fundamental physical quantities the dimensional formula of force is
jeemain
physics
class11
ch2
units-and-measurement
q36
easy
dimensional-formulae-and-analysis
asked
Jun 18, 2013
by
meena.p
1
answer
Energy density and pressure have
jeemain
physics
class11
ch2
units-and-measurement
q35
easy
international-system-of-units
asked
Jun 18, 2013
by
meena.p
1
answer
Of the following quantities which one has dimensions different from the remaining three ?
jeemain
physics
class11
ch2
units-and-measurement
q34
easy
dimensional-formulae-and-analysis
asked
Jun 18, 2013
by
meena.p
1
answer
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