MCAT 2012

                           MCAT 2012

Which pair of transition elements shows abnormal electronic configuration
a) Sc and Zn
b) Cu and Sc
c) Zn and Cu
d) Cu and C

A simple harmonic oscillator has a time period of 10 second which equation relates its acceleration a and displacement x
a) a=-10x
b) a=-(20pi) x
c) a= -(2pi/10)^2 x
d) a=-(20pi)^2x

Flow speed of fluid through a non-uniform pipe increases from 1m/sec to 3m/sec . if change in PE

is zero then pressure difference b/w two points will be (density of fluid=1000kg/m3)

a) 1000N/m2

b)9000N/m2

c) 8000 N/m2

d) 4000 N/m2

Heat engine operating according to second law of thermodynamics rejects one fourth of the heat

taken from high temp reservoir what is % efficiency of heat engine

a) 100%

b) 25%

c) 50%

d) 75%

The image of an object placed inside the focal length of a convex lens will be largest n cleared

when it is at the

a) less than 25cm

b) near point

c) greater than 25cm

d) infinity

If Q is the amount of heat supplied to a system and W is the work done then change in internal

energy can be defined as

a) Q/W

b) W/Q

c) Q-W

d) 1+Q/W

First law of thermodynamics under adiabatic conditions can be mathematically written as

a) Q=W

b) Q= delta U

c) Q=U+W

d) W= - delta U

Polarization of light exhibited the nature of light

a0 longitudinal waves

b) compressional waves

c) transverse waves

d) diffraction wave

The concentration of sugar solution can be determined by

a) un polarized light

b) plane polarized

c) interfence of light

d) diffraction of light

if speed of efflux through a small hole in a large tank is 9.8m/sec find the height of the fluid

above

a) 1m

b) 9.8m

c) 4.9m

d) 19.6m

Stoke’s law for steady motion in a fluid of infinite extent is given by

a).6.pi.n.r^2

B).6 .pi.n./r^2

c).6 .pi.n.rv

d.6 .pi.n./r

The information from one place to another can be transmitted safely n easily by

a) copper wire

b) aluminum wire

c) photodiode

d) optical fiber

The kinetic energy with which the electron strikes the target is given by

a) KE= e2v

b) KE=hc/lamda

c) KE=Hf2

d) KE=eV

If an electron in the K shell is removed and a n electron from L shell jumps to occupy the hole in

the K-shell it emits a photon of energy

a) hfka=EL-Ek

b) hc=EL-Ek

c) h/lamda=EL-Ek

d)hf=Ek-EL

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