MCAT Chem Domain 3: Physics Welcome to your MCAT Chem Domain 3: Physics 1. MCAT Chem: Physics A proton is accelerated from rest through a potential difference of 1 MV. What is the final kinetic energy of the proton in electron volts (eV)? \(1 \times 10^6\) eV \(2 \times 10^6\) eV \(1.6 \times 10^{-19}\) eV \(1 \times 10^3\) eV None 2. MCAT Chem: Physics A cylindrical rod of length \(L\) and radius \(r\) has a charge density \(\rho\) (charge per unit volume). What is the electric field at a point \(P\), located a distance \(d\) from the rod's axis, where \(d > r\)? \(\frac{\rho L}{2\pi \varepsilon_0 d}\) \(\frac{\rho L}{4\pi \varepsilon_0 d^2}\) \(\frac{\rho}{2\pi \varepsilon_0 d}\) \(\frac{\rho}{2\pi \varepsilon_0 r}\) None 3. MCAT Chem: Physics A mirror produces an image that is three times the size of the object. If the object is placed 12 cm in front of the mirror, what is the nature and focal length of the mirror? Concave mirror with focal length of 8 cm Convex mirror with focal length of -8 cm Concave mirror with focal length of -4 cm Convex mirror with focal length of 4 cm None 4. MCAT Chem: Physics A block of mass \(m\) slides down a frictionless incline of height \(h\) and angle \(\theta\). What is the speed of the block at the bottom of the incline? \(v = \sqrt{2gh}\) \(v = \sqrt{gh}\) \(v = \sqrt{2gh\sin\theta}\) \(v = \sqrt{gh\cos\theta}\) None 5. MCAT Chem: Physics A particle is moving in a circle of radius \(r\) with a constant angular velocity \(\omega\). What is the magnitude of the particle's acceleration towards the center of the circle? \(a = r\omega\) \(a = r\omega^2\) \(a = \frac{\omega}{r}\) \(a = \omega^2 r\) None 6. MCAT Chem: Physics In a photoelectric effect experiment, the stopping potential for electrons ejected from a metal surface by photons of a certain energy is 2 V. If the frequency of the incident photons is doubled, what is the new stopping potential? 4 V 8 V More information is needed to determine the new stopping potential. The stopping potential does not change with frequency. None 7. MCAT Chem: Physics A uniform magnetic field is directed into the page. A charged particle moves through the field in a direction perpendicular to the field lines. Which of the following best describes the path of the particle? Straight line Parabola Circle Spiral None 8. MCAT Chem: Physics A transformer has 100 turns in its primary coil and 200 turns in its secondary coil. If the primary coil is connected to a 120 V power source, what is the voltage across the secondary coil? 60 V 120 V 240 V 480 V None 9. MCAT Chem: Physics A wave on a string has a frequency of 500 Hz and a wavelength of 2 m. If the tension in the string is doubled, what is the new wavelength of the wave, assuming the mass per unit length of the string remains constant? 1 m 2 m \(2\sqrt{2}\) m 4 m None 10. MCAT Chem: Physics An electron moves in a circular path perpendicular to a uniform magnetic field. If the speed of the electron is doubled, what happens to the radius of its circular path? It remains the same. It is halved. It doubles. It quadruples. None 11. MCAT Chem: Physics A charged particle moves through a uniform magnetic field. The particle's velocity is perpendicular to the magnetic field direction. Which of the following best describes the subsequent motion of the particle? It will move in a straight line at a constant speed. It will accelerate in the direction of the magnetic field. It will move in a circular path with constant speed. It will come to an immediate stop. None 12. MCAT Chem: Physics A parallel plate capacitor is filled with a dielectric material that has a dielectric constant \(k\). If the separation between the plates is halved while the voltage across the capacitor remains constant, what happens to the capacitance and the stored energy, respectively? The capacitance doubles, and the stored energy remains unchanged. The capacitance remains unchanged, and the stored energy halves. The capacitance doubles, and the stored energy halves. The capacitance doubles, and the stored energy doubles. None 13. MCAT Chem: Physics A wave travels through a medium with a speed of 340 m/s. If the frequency of the wave is 170 Hz, what is the wavelength of the wave in this medium? 0.5 m 1 m 2 m 4 m None 14. MCAT Chem: Physics In a Young's double-slit experiment, the distance between the slits is decreased while the wavelength of the light and the distance to the screen are kept constant. What happens to the fringe spacing on the screen? It increases. It decreases. It remains the same. It becomes zero. None 15. MCAT Chem: Physics A photon of wavelength 500 nm is absorbed by a molecule, exciting it from the ground state to a higher energy state. The energy difference between these states corresponds to which of the following frequencies? \(6.0 \times 10^{14}\) Hz \(3.0 \times 10^{14}\) Hz \(7.5 \times 10^{14}\) Hz \(5.0 \times 10^{15}\) Hz None 16. MCAT Chem: Physics A particle in a box of length L has its energy levels described by the equation \(E_n = \frac{n^2h^2}{8mL^2}\), where \(n\) is a quantum number, \(h\) is Planck's constant, \(m\) is the mass of the particle, and \(L\) is the length of the box. If the energy level of the particle is quadrupled, how does the quantum number change? It doubles. It quadruples. It halves. It remains the same. None 17. MCAT Chem: Physics A plane wave front approaches a flat barrier with a small slit at an angle of 30". The wave emerges from the slit and propagates as a circular wave front. What is this phenomenon called? Reflection Refraction Diffraction Polarization None 18. MCAT Chem: Physics A block of mass \(m\) slides down a frictionless incline of height \(h\) and angle \(\theta\). What is the speed of the block at the bottom of the incline? \(v = \sqrt{2gh}\) \(v = \sqrt{gh}\) \(v = \sqrt{2gh\sin\theta}\) \(v = \sqrt{gh\cos\theta}\) None 19. MCAT Chem: Physics A uniform magnetic field is directed into the page. A charged particle moves through the field in a direction perpendicular to the field lines. Which of the following best describes the path of the particle? Straight line Parabola Circle Spiral None 20. MCAT Chem: Physics In a Young's double-slit experiment, the distance between the slits is decreased while the wavelength of the light and the distance to the screen are kept constant. What happens to the fringe spacing on the screen? It increases. It decreases. It remains the same. It becomes zero. None 1 out of 20 Time is Up! Time's up
