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