SINDH MDCAT 2017 PAPER MDCAT 2017 ( PART 3 ) 1. Incident rays of light parallel to the principal axis of a convex lens, after refraction by the lens, will: Converge at the center of curvature Diverge as long as they are close to the lens Converge inside the principal focus Converge outside the principal focus Converge at the principal focus 2. If two sounds have the same wavelength in air at the same temperature, what other property must they also have in common? I. Intensity II. Amplitude III. Frequency III only II and III only I, II and III I and II only I only 3. Which unit expresses work per unit charge? Hertz Half-life Joule Volt Watt 4. The time of one vibration of a simple pendulum may be decreased by: Using a lighter bob Increasing the length of the pendulum Decreasing the length of the pendulum Using a heavier bob 5. The sum of all forms of molecular energies in a thermodynamic system is known as: Enthalpy Entropy Internal energy Red shift 6. ____ is also known as anti-electron Proton Photon Nucleon Positron 7. When describing the isotopes of the same element, the most accurate statement is that they have: The same chemical properties and therefore can not be separated The same spin The same atomic mass but different atomic numbers The same atomic number but different atomic masses A coexistence limit, that is, no element can have more than three isotopes 8. In Nuclear reactions, we have the conservation of: Mass only Mass, energy and momentum Momentum only Energy only 9. The lightest element which exhibits radioactivity is: Deuteron Helium Tritium Hydrogen 10. Nucleus with an excess of neutrons may decay radioactivity with the emission of: A neutron An electron A positron A proton Loading … Pages: 1 2 3 4 5 6 7 8 9 10
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