Tawjihiya Bahrain (Secondary School Certificate) · Physics And Chemistry

Mechanics, Waves and Electromagnetism

31 practice questions, each with the answer and an explanation.

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All 31 questions

  1. A car accelerates uniformly from rest to a speed of 20 m/s in 5.0 seconds. What is the acceleration of the car?
  2. A horizontal net force of 50 N acts on a crate of mass 10 kg resting on a frictionless floor. What is the resulting acceleration?
  3. How much work is done when a constant force of 30 N moves a box by 4.0 meters along the line of action of the force?
  4. An object of mass 2.0 kg moves with a constant speed of 6.0 m/s. What is its kinetic energy?
  5. A sound wave in air has a frequency of 680 Hz. If the speed of sound in air is 340 m/s, what is its wavelength?
  6. Light travels from air (n1 = 1.00) into crown glass (n2 = 1.50) at an angle of incidence of 30 degrees. Find sin(theta2) for the refracted ray.
  7. What is the equivalent resistance of three 6.0-ohm resistors connected in parallel across a circuit?
  8. A resistor carries a current of 3.0 A when connected across a potential difference of 24 V. What power is dissipated as heat?
  9. According to Coulomb's Law, if the distance between two point charges is doubled, what happens to the electrostatic force between them?
  10. A magnetic flux through a 50-turn coil changes uniformly from 0.10 Wb to 0.30 Wb in 0.20 seconds. What is the magnitude of the induced EMF?
  11. An electric train has a mass of 40,000 kg and moves at 15 m/s. What is its linear momentum?
  12. What is the period of a simple pendulum of length 0.98 m on Earth where g = 9.8 m/s^2?
  13. A photon has a frequency of 5.0 10^14 Hz. Using Planck's constant h = 6.63 10^-34 J*s, find the photon's energy.
  14. In a double-slit interference experiment, what happens to the fringe spacing on the screen if the slit separation d is decreased?
  15. What is the de Broglie wavelength of an electron moving with momentum p = 3.315 10^-24 kgm/s? (h = 6.63 10^-34 Js)
  16. Which statement describes Lenz's Law of electromagnetic induction?
  17. A 4.0 kg ball dropped from rest falls freely under gravity for 3.0 seconds. What speed does it attain? (g = 9.8 m/s^2)
  18. What is the frequency of a wave with a time period T = 0.0050 seconds?
  19. Two point charges of +2.0 microcoulombs and +8.0 microcoulombs are separated by 0.30 m in vacuum. Find the repulsive force. (k_e = 9.0 10^9 Nm^2/C^2)
  20. What is the total internal reflection critical angle theta_c for a boundary between water (n = 1.33) and air (n = 1.00)?
  21. A transformer has 200 primary turns and 800 secondary turns. If the input AC voltage is 120 V, what is the output voltage?
  22. What type of mirror always produces a virtual, upright, and diminished image regardless of object position?
  23. An electric kettle rated at 2,000 W operates for 180 seconds. How much electrical energy does it consume?
  24. When an unpolarized light beam of intensity I0 passes through an ideal linear polarizing filter, what is the transmitted intensity?
  25. What is the SI unit of magnetic field strength (magnetic flux density B)?
  26. A ball of mass 0.50 kg traveling at 10 m/s hits a wall and bounces back in the opposite direction at 8.0 m/s. What is the magnitude of the impulse delivered to the ball?
  27. A projectile is launched from ground level with initial speed at an angle of above the horizontal. Taking and neglecting air resistance, what is its ma…
  28. What is the concentration of hydronium ions in a 0.050 M aqueous solution of ammonia () at ? (, )
  29. A parallel-plate capacitor with air between its plates has capacitance and is charged to potential . It is then disconnected from the battery, and a dielectri…
  30. Which of the following organic reactions represents an aldol condensation with elimination?
  31. A source of sound produces a frequency of 500 Hz. If an observer approaches the stationary source with a speed of in air where sound speed is , what frequency is detect…

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