A compound microscope is an optical instrument which is used to magnify very small objects like blood cells, bacteria which otherwise cannot be seen with the naked eye.
A Laboratory Model of Compound Microscope
The essential parts of a compound microscope are two convex lenses of short focal length. These lenses are referred to as:
= mo x me
Where mobjective (mo) and meyepiece (me) are the magnification produced by the objective and eyepiece respectively.m = mo x me
Eye piece is nothing but a simple microscope
QUESTIONS:
1> The Fundamental units in MKS system are:
a> 3
b> 4
c> 6
d> 7
2> The fundamental units in S.I. system are:
a> 3
b> 6
c> 7
d> 9
3> The Latest standard of length is
a> Light Year.
b> Distance traveled by sound in air.
c> Distance traveled by light in vaccum.
d> Wavelength of orange light of KR 86.
4> The dimensional formula of impulse is:
a>
b>
c>
d>
5> The dimensional formula of torque is:
a>
b>
c>
d>
6> The dimensional formula of coefficient of viscosity is:
a>
b>
c>
d>
7> The dimensional formula of angular velocity is:
a>
b>
c>
d>
8> The force on a sphere of radius “a” moving in a medium with velocity v is given by 
a>
b>
c>
d>
9> Which of the following has the dimensions pressure:
a>
b>
c>
d>
10> The position x of a particle at time t is given by:
where 
a>
b>
c>
d>
11> The dimensions of impulse are equal to that of:
a> Force
b> Pressure
c> Angular momentum
d>Linear momentum
12> The dimensions of stress are:
a>
b>
c>
d>
13> the dimensions of strain are:
a>
b>
c>
14> The dimensions of surface tension are:
a>
b>
c>
d>
15> The dimension of surface tension are same a that of:
a>Moment of inertia.
b>Force constant
c> Tension
4>Torque
16> The dimensions of Plank’s constant “h” are:
a>
b>
c>
d>
17> The dimensions of Plank’s constant “h” are same as that of:
a>Linear momentum
b>Energy
c>Angular momentum
d>Boltzmann’s constant
18> The dimensions of volume of liquid flowing per second is:
a>
b>
c>
d>
19> The dimensions of mass flowing per second is:
a>
b>
c>
d>
20> The dimensions of Energy flowing per unit volume is:
a>
b>
c>
d>
21>The equation of SHM is given by y=A Sin Cx+B Cos Dt
the dimensions of the ratio of D:C are:
a>
b>
c>
22> The dimensions of Heat Energy are:
a>
b>
c>
d>
23> The dimensions formula for modulus of rigidity is:
a>
b>
c>
d>
24> The dimensional formula ![[ML^2T^{-2}]](http://s.wordpress.com/latex.php?latex=%5BML%5E2T%5E%7B-2%7D%5D&bg=ffffff&fg=000000&s=2 "[ML^2T^{-2}]")
a>The moment of force
b>Acceleration
c>Force
d>Angular momentum
25> Which os the following pairs of physics quantities have same dimensions:
a>Momentum and impulse
b>Linear velocity and angular velocotity
c>Linear momentum and angular momentum
d>Tension and Surface tension
26> The system os units developed in recent years recommended for wide us is:
a> C.G.S
b> F.P.S
c> M.K.S
d> S.I.
27> The statement that “The dimensional analysis can be used in deducing exact relationship between any number of physical quantities” is:
a> True
b>False
C> Uncertain
D> None of above
28> In S.I. system the Pascal is the unit of:
a>Surface tension
b>Surface energy
c>Viscosity
d>Pressure
29> In S.I. system watt multiplied by second is called:
a> Newton
b> Joule
c> Pascal
d> Joule/sec^2
30> The unit of energy is:
a> Watt
b> Newton
c> Kilowatt hour
d>Poise
31> Torr is unit of:
a> Pressure
b> Force
c> Surface tension
d> Viscocity
32> 1 Torr is equal to:
a> 1 atmoshphere
b> 1 bar
c> 1 mm of Hg
d> 1 cm of Hg
33> One micrometer is equal to:
a> 10^-4 m
b> 10^-6 m
c> 10^-8 m
d> 10^-10 m
34> 1 Fermi is equal to:
a> 10^-12 Farad
b> 10^-12 m
c> 10^-15 m
d> 10^-15
35>The quantity which is not defined in terms of force per unit area is:
a> Pressure
b>Stress
c>Strain
d>Young’s modulus
36>The number of particles crossing a unit area perpendicular to x-axis in unit time is given by:
where, n1,n2 are the number of particles per unit volume at x=x1 and x=x2 respectively.
The dimensions of D called diffusion coefficient are:
a>
b>
c>
d>
37> If e is electronic charge , h is Plank’s constant and c is speed of light then the quantity:
the quantity has the dimension of:
a>Mass
b>length
c>Time
d>Dimensionless
38> In the relation:
where St represents the distance traveled in t seconds , u is initial velocity , a is acceleration.
The dimensions of St are:
a>
b>
c>
d>
39>The relation in Q.38 is:
a> Numerically correct only
b>Dimensionally correct only
c>Both numerically and dimensionally correct
d>Neither numerically nor dimensionally correct
40>The Bernoulli’s theorem may be expressed as:
Where , p=pressure , d=density, v=velocity, g=acceleration due to gravity and h=height of liquid layer above horizontal ; The dimension of
constant C are:
a>
b>
c>
d>
41>The equation of state for real gas(Vander wall’s gas) is:
\left(p+\frac{a}{v^2} \right)(V-b)=RT" title="\left(p+\frac{a}{v^2} \right)(V-b)=RT" class="latex" style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; border-top-width: 0px; border-right-width: 0px; border-bottom-width: 0px; border-left-width: 0px; border-style: initial; border-color: initial; vertical-align: middle; border-top-style: none; border-right-style: none; border-bottom-style: none; border-left-style: none; border-width: initial; border-color: initial; ">where p=pressure , V=volume
The dimensions of “a” are:
a>
b>
c>
d>
42>In the equation in Q.41 , the dimension of “b” are:
a>
b>
c>
d>
43> The force acting between two particles of masses m1 and m2 at separation r is given by:
The dimensions of gravitational constant “G” are:
a>
b>
c>
d>
44>The dimensions of Calorie are:
a>
b>
c>
d>
45> In Wien’s formula
Where ,
The dimensions of Wien’s constant “b” are:
a>
b>
c>
d>
46> 1 X-ray unit is:
a>10^-10 m
b>10^-12 m
c>10^-13 m
d>10^-15 m
47>If force F , acceleration A and time T are taken as fundamental physical quantities , The dimensions
of length L in this new system will be:
a>
b>
c>
d>
48>Which of the following is not a unit of time:
a>Lunar month
b>Leap year
c>Solar day
d>Light year
49>Which of the following is unit of distance:
a>Second
b>Parallactic second
c>Watt
d>Pascal
50> Joule multiplied by second is the unit of:
a>Energy
b>Momentum
c>Angular momentum
d>Power
ANSWERS:
1>a 2>c 3>c 4>b 5>b 6>d 7>c 8>a 9>d 10>a 11>d 12>c 13>c 14>b 15>b 16>b 17>c 18>b 19>d 20>c 21>b 22>b 23>d 24>a 25>a 26>d 27>b 28>d 29>b 30>c 31>a 32>c 33>b 34>c 35>c 36>d 37>d 38>c 39>c 40>a 41>a 42>b 43>b 44>a 45>d 46>c 47>c 48>d 49>b 50>c
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![[M]](http://s.wordpress.com/latex.php?latex=%5BM%5D&bg=ffffff&fg=000000&s=2 "[M]")
![[MT]](http://s.wordpress.com/latex.php?latex=%5BMT%5D&bg=ffffff&fg=000000&s=2 "[MT]")
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![[FT]](http://s.wordpress.com/latex.php?latex=%5BFT%5D&bg=ffffff&fg=000000&s=2 "[FT]")
![[FAT]](http://s.wordpress.com/latex.php?latex=%5BFAT%5D&bg=ffffff&fg=000000&s=2 "[FAT]")
![[AT^2]](http://s.wordpress.com/latex.php?latex=%5BAT%5E2%5D&bg=ffffff&fg=000000&s=2 "[AT^2]")
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