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Home » Medical Papers » UHS MDCAT » Aptitude Test - 27
1.In ‘General Gas Equation PV=nRT’, ‘n’ represents the number of moles of gas. Which of the following represents the relation of ‘n’?
A. n = NNA
B. n = N/NA
C. n = NA/N
D. n = NNA
2.LASER is an acronym for:
A. Light amplification by stimulated emission of radiation
B. Light annihilation by stimulated emission of radiation
C. Light amplitude of stimulated emission of radiation
D. Light amplification by stimulated emission of radiation
3.At triple point of water, the pressure of gas is 2680 Pa, by changing ‘T’ the pressure increases to 4870 Pa. Then ‘T’ is:
A. 496.38
B. 438.96 K
C. Zero
D. 496.38
4.X-rays can be produced by bombardment of ____________ on target metal:
A. Protons
B. Electrons
C. Neutrons
D. Protons
5.Laser light is monochromatic which means
A. It consists of one ray of light
B. It consists of one wavelength
C. It consists of carbon monoxide gas
D. It consists of one ray of light
6.If an electron in the ‘K’ shell is removed and an electron from ‘L’ shell jumps to occupy the hole in the ‘K’ shell, it emits a photon of energy:
A. hfKα = EL – EK
B. hc = EL – EK
C. h/λKα = EL – EK
D. hfKα = EL – EK
7.Which of the following property must be there in a substance so that it can be used as target in X-ray tube?
A. It must have low melting point
B. It must have low atomic number
C. It must have high reflecting ability
D. It must have low melting point
8.Which of the following can be used to produce population inversion for the emission of Laser?
A. Optical pumping
B. Optical fibre
C. Optical instrument
D. Optical pumping
9.What is the charge on alpha particles emitted during the phenomenon of radioactivity?
A. +e
B. –e
C. –2e
D. +e
10.A radioactive nuclide decays by emitting an alpha particle, a beta particle and a gamma ray photon, the change in the nucleon number will be:
A. -4
B. -1
C. -2
D. -4
11.A half-life of sodium-24 is _______ which is used to estimate the volume of blood in a patient:
A. 6 hours
B. 15 hours
C. 8 hours
D. 6 hours
12.Which of the following is unit of absorbed dose?
A. Sievert
B. Gray
C. Roentgen
D. Sievert
13.The isotope of Iodine-131 is used in the treatment of
A. Blood cancer
B. Bone cancer
C. Lung tumor
D. Blood cancer
14.Which of the following effect is observed due to emission of β― during the phenomenon of radioactivity?
A. A increases by 1 and Z remains same
B. Z increases by 1 and A remains same
C. Z decreases by 1 and A remains same
D. A increases by 1 and Z remains same
15.Electric charge on an object is measured as 5 micro coulombs. How the value of this charge can be expressed in terms of base units:
A. 5 x 100 ampere second
B. 5 x 10-6 ampere second
C. 5 x 10+6 coulomb second
D. 5 x 100 ampere second
16.If ‘m’ is the mass, ‘c’ is the velocity of light and x = mc2, then dimensions of ‘x’ will be:
A. [LT-1]
B. [ML2T-2]
C. [MLT-1]
D. [LT-1]
17.An object of mass ‘m’ is suspended in an elevator moving downward with acceleration equal to acceleration due to gravity. What is the apparent weight of object?
A. Zero
B. 2mg
C. mg
D. Zero
18.Stokes’ Law for steady motion in a fluid of infinite extent is given by
A. F = 6πηrv
B. F = (4/3)πr3ρg
C. F = 6πηr2ρ
D. F = 6πηrv
19.If speed of efflux through a small hole in a large tank is 9.8 m/s. Find the height at the fluid above the hole
A. 1 m
B. 9.8 m
C. 4.9 m
D. 1 m
20.Polarization of light exhibited the nature of light as
A. Longitudinal wave
B. Compressional wave
C. Transverse wave
D. Longitudinal wave
21.The concentration of a sugar solution can be determined by
A. Un-polarized light
B. Plane polarized light
C. Interference of light
D. Un-polarized light
22.The information from one place to another can be transmitted very safely and easily by:
A. Copper wire
B. Aluminium wire
C. Photodiode
D. Copper wire
23.The image of an object placed inside the focal length of a convex lens will be largest and clearest when it is at the
A. Less than 25 cm
B. Near point
C. Greater than 25 cm
D. Less than 25 cm
24.A simple harmonic oscillator has a time period of 10 seconds. Which equation rotates its acceleration ‘a’ and displacement ‘x’?
A. a = -2 x
B. a = -(20Ï€)x
C. a = -( 2Ï€/ 10 ) 2 x
D. a = -2 x
25.When the length of a simple pendulum is doubled, find the ratio of the new frequency to the old frequency?
A. 1/4
B. 1/2
C. √2
D. 1/4
26.The ratio of tensile strength to tensile strain is called
A. Modulus of elasticity
B. Bulk Modulus
C. Young’s Modulus
D. Modulus of elasticity
27.A wire is stretched by a force ‘F’ which causes an extension Δl, the energy stored in the wire is:
A. FΔl
B. 2FΔl
C. ½ FΔl2
D. FΔl
28.H2 and O2 both are at thermal equilibrium at temperature 300 K. Oxygen molecule is 16 times massive than hydrogen. Root mean square speed of hydrogen
A. 4 root mean square of oxygen
B. ¼ root mean square of oxygen
C. 1/16 root mean square of oxygen
D. 4 root mean square of oxygen
29.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. Q – W
C. W/Q
D. Q/W
30.A heat engine operating according to second law of thermodynamics rejects one fourth of the heat taken from high temperature reservoir. What is the percentage efficiency of heat engine?
A. 100%
B. 25%
C. 50%
D. 100%
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