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Home » Medical Papers » UHS MDCAT » Aptitude Test - 13
1.If velocity is double, then.
A. Momentum increase 4 times and K.E increases 2 times
B. Momentum and K.E remain same
C. Momentum increases 2 times and K.E increase constant
D. Momentum increase 4 times and K.E increases 2 times
2.The consumption of energy by 60-watt bulb in 2 seconds is:
A. 20 J
B. 120 J
C. 30 J
D. 20 J
3. In transistors, the base region is very thin, of the order o
A. 10-5 cm
B. 10-6 m
C. 10-6 mm
D. 10-5 cm
4.The closed loop gain of OP-AMP depends on
A. Internal structure of OP-AMP
B. Externally connected resistances
C. Voltage of power supplies
D. Internal structure of OP-AMP
5.The net charge on an N-type substance is
A. 0.7 volts
B. 0.3 volts
C. 0.25 volts
D. 0.7 volts
6.The value of Wien’s constant is
A. 2.90 x 10-3 mK
B. 3.34 x 10-4 mK
C. 4.22 x 10-7 mK
D. 2.90 x 10-3 mK
7.The minimum frequency below which no electron is emitted from the metal surface is called
A. High frequency
B. Low frequency
C. Threshold frequency
D. High frequency
8.In pair production, the type of photon used
A. α-particle
B. β-particle
C. X-rays
D. α-particle
9.The life time of an electron in an excited state is about 10-8 s. What is its uncertainty in energy during this time?
A. 1.05 x 10-41 J
B. 1.05 x 10-26 J
C. 1.15 x 1010 J
D. 1.05 x 10-41 J
10.Velocity of electron moving in first orbit of hydrogen is
A. 2.19 x 107 m/sec
B. 2.18 x 107 m/sec
C. 2.2 x 108 m/sec
D. 2.19 x 107 m/sec
11.LASER is a potential energy source for inducing which type of reaction?
A. Radioactive
B. Fission
C. Ionization
D. Radioactive
12.In the half-life of an element, the equation for the number of decaying atoms is given by
A. ΔN ∝ -NΔt
B. ΔN = KNΔt
C. ΔN ∝ -nΔt
D. ΔN ∝ -NΔt
13.Decay constant ‘λ’ is given as
A. - ∆N/N ∆t
B. - ∆N /∆t
C. - N/ ∆t
D. - ∆N/N ∆t
14.The SI unit of absorbed dose ‘D’ i.e. radiation effect is Gray and one Gray is equal to
A. kJ / mol
B. J / mol
C. kg / J
D. kJ / mol
15.The principle of homogeneity of dimensions determines
A. Only variable in the equation
B. Only constant in the equation
C. Correctness of an equation
D. Only variable in the equation
16.For a body to be in complete equilibrium
A. Linear acceleration is zero
B. Angular acceleration is zero
C. Linear acceleration is zero but angular acceleration is not zero
D. Linear acceleration is zero
17.If length of a spanner is ‘I’ and a force ‘F’ is applied on it to tighten a nut such that it passes through the pivot point, then torque is
A. Zero
B. Ff
C. Fl sin θ
D. Zero
18. If a force of magnitude 8 N acts on a body in direction making an angle 30, its x and y components will be
A. Fx = 4√3 and Fy = 8
B. Fx = 8 and Fy = 4√3
C. Fx = 4√3 and Fy = 4
D. Fx = 4√3 and Fy = 8
19.The difference of a vector B⃗ and its negative vector – ⃗ is
A. A null vector
B. Equal to magnitude of vector B⃗
C. Twice the magnitude of vector B⃗
D. A null vector
20.If the velocity of the body changes by equal amount in equal intervals of time, the body is said to have:
A. variable acceleration
B. uniform acceleration
C. uniform velocity
D. variable acceleration
21.In order to determine the maximum height of the projectile, the equation of motion used is
A. aS = vf 2 - vi̇ 2
B. 2aS = vf 2 - vi̇
C. 2S = a vf 2 - vi̇ 2
D. aS = vf 2 - vi̇ 2
22.Diseases in living organisms which are caused by parasites are called:
A. Disinfestations
B. Antisepsis
C. Infections
D. Disinfestations
23.If a force of 12 N acts on a car and changes its momentum from 36 kgm/sec to 60 kgm/sec, the time during which this change occurs will be
A. 24 sec
B. 2 sec
C. 12 sec
D. 24 sec
24.The nutrient cycles are also called:
A. Biogeochemical cycles
B. Biochemical cycles
C. Bio element cycles
D. Biogeochemical cycles
25.Which one of the following is a non-conservative force?
A. Electric force
B. Elastic spring force
C. Gravitational force
D. Electric force
26.Value of escape velocity for the surface of the earth is 11 km/sec. Its value for surface of the moon is
A. 11 km/sec
B. 1.4 kWm
C. 1.0 Wm
D. 11 km/sec
27.The productivity of aquatic ecosystem is determined by:
A. Water
B. Light and nutrients
C. Light
D. Water
28.On a clear day at noon, the intensity of solar energy reaching the earth’s surface is about
A. 1.0 kWm-2
B. 1.4 kWm-2
C. 1.0 Wm-2
D. 1.0 kWm-2
29.What is the drawback of nuclear energy?
A. It causes radiation pollution
B. It is not long lasting
C. It is very expensive
D. It causes radiation pollution
30.Arteriosclerosis is:
A. A metabolic disorder
B. A degenerative Disorder
C. An infectious disorder
D. A metabolic disorder
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