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Home » Medical Papers » UHS MDCAT » Aptitude Test - 1
1.When a helium atom loses an electron, it becomes:
A. An alpha particle
B. Proton
C. A positive helium ion
D. An alpha particle
2.When a helium atom loses an electron, it becomes:
A. Alpha partical
B. A positive helium ion
C. A negative helium ion
D. Alpha partical
3.Beta ray emitted by a radioactive substance is:
A. An electron which was existing outside the nucleus
B. An electron which was existing inside the nucleus.
C. An electron emitted by the nucleus as a result of the decay of neutron inside the nucleus.
D. An electron which was existing outside the nucleus
4.An electric charge in uniform motion produces
A. An electric field.
B. Both magnetic and electric fields.
C. A magnetic field.
D. An electric field.
5.What is emitted by a hot metal filament in a cathode ray tube?
A. X ray
B. Electron
C. Proton
D. X ray
6.If the mass of the bob of a pendulum is doubled its time period is:
A. Halved.
B. Unchanged.
C. Doubled.
D. Halved.
7.The centre of Newton rings is dark due to:
A. Polarization.
B. Destructive interference.
C. Constructive interference.
D. Polarization.
8.Which one is most stable element on the basis of binding energy?
A. Sn.
B. Ba.
C. Kr.
D. Sn.
9.Resistance in RC circuit of time constant 2 seconds is 1000 Ohms. What is value of C in the circuit?
A. 2 μ farad.
B. 20 μ farad.
C. 200 μ farad.
D. 2 μ farad.
10.The Lenz’s law refers to induced _________
A. emf.
B. Resistance.
C. Shears.
D. emf.
11.In which of the following, output is similar to NAND gate if input A=0 and input B=1.
A. NOR.
B. XNOR.
C. XOR.
D. NOR.
12.For atomic hydrogen spectrum, which of the following series lies in visible region of electromagnetic spectrum?
A. Lyman series.
B. Paschen series.
C. Balmer series.
D. Lyman series.
13.__________ are the particles that experience strong nuclear force
A. Electrons.
B. Muons.
C. Nutrions
D. Electrons.
14.The vertical velocity of ball thrown upward __________ with time.
A. Decrease linearly.
B. Remain constant.
C. Doubles.
D. Decrease linearly.
15.The force required to bend the normally straight path of a particle into a circular path is called __________ force.
A. Traveling
B. Bending
C. Centrifugal
D. Traveling
16.A disc at rest without slipping, rolls down a hill of height (3 x 9.8) m. What is its speed in m/sec when it reaches at the bottom?
A. 11.4.
B. 19.6.
C. 22.8.
D. 11.4.
17. Tuning of the radio is the best example of electrical __________
A. Resonance
B. Resistance
C. Current
D. Resonance
18.A standing wave pattern is formed when the length of string is an integral multiple of __________ wavelength.
A. Triple.
B. Full.
C. Half.
D. Triple.
19.Which of the following lights travels the fastest in optical fibres?
A. Visible light.
B. Invisible infra-red.
C. Ultra-violet.
D. Visible light.
20. The algebraic sum of potential changes in a closed circuit is zero is Kirchhoff’s __________ rule.
A. First
B. Second
C. Third
D. First
21.In LED when an electron combines with a __________ during forward bias conduction, a photon of visible light is emitted.
A. High Voltage.
B. Photon.
C. Hole.
D. High Voltage.
22.For photons of energy greater than 1.02 MeV the probability of pair production occurrence __________ as the energy increases.
A. increase.
B. Completely Diminishes
C. Reduces to half
D. increase.
23.The neutron is assumed to be made of
A. One up quark and two down quarks.
B. Two up quarks and two down quarks.
C. Two up quarks and one down quark.
D. One up quark and two down quarks.
24.An __________ missile is called a ballistic missile.
A. Un-powered and guided.
B. Un-guided and powered.
C. Powered and guided.
D. Un-powered and guided.
25.Two cylinders of equal mass are made from same material. The one with the larger diameter accelerates __________ the other under the action of same torque.
A. Faster than.
B. Slower than.
C. Equal to.
D. Faster than.
26.A single mode step index fibre has core of about __________ μm diameter
A. 50 to 1000.
B. 50
C. 30
D. 50 to 1000.
27.The angular frequency of simple pendulum is directly proportional to __________
A. I.
B. 1/I.
C. V I.
D. I.
28.Two waves of slightly different frequencies and traveling in same direction produce ________
A. Interference.
B. Polarization.
C. Stationary waves.
D. Interference.
29.A 5 Ohm resistor is indicated by a single __________ color band around its body.
A. Red.
B. Green.
C. Blue.
D. Red.
30.Practically __________ current flows in a reverse biased p-n junction.
A. No.
B. Very Large.
C. Few milliamperes.
D. No.
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