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: Diverge as long as they are close to the lens Converge at the principal focus Converge at the center of curvature Converge outside the principal focus Converge inside 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 I, II and III I and II only II and III only I only 3. Which unit expresses work per unit charge? Watt Joule Volt Half-life Hertz 4. The time of one vibration of a simple pendulum may be decreased by: Using a lighter bob Using a heavier bob Decreasing the length of the pendulum Increasing the length of the pendulum 5. The sum of all forms of molecular energies in a thermodynamic system is known as: Entropy Enthalpy Internal energy Red shift 6. ____ is also known as anti-electron Photon Proton 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 number but different atomic masses A coexistence limit, that is, no element can have more than three isotopes The same atomic mass but different atomic numbers 8. In Nuclear reactions, we have the conservation of: Energy only Mass only Mass, energy and momentum Momentum only 9. The lightest element which exhibits radioactivity is: Helium Hydrogen Deuteron Tritium 10. Nucleus with an excess of neutrons may decay radioactivity with the emission of: A positron An electron A proton A neutron Loading … Pages: 1 2 3 4 5 6 7 8 9 10
