Bagrut (Secondary School Matriculation) · Physics

Electromagnetism, Wave Optics and Modern Physics

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

Practise Electromagnetism, Wave Optics and Modern Physics now

Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 26 questions

  1. A 1.0 kg block attached to a horizontal spring oscillates with simple harmonic motion. When its displacement is x = 0.05 m, its speed is v = 0.2 m/s, and when x = 0.08 m, its speed is v = 0.1 m/s. Wha…
  2. Two identical spheres A and B undergo an elastic oblique collision in two dimensions. Sphere A is initially moving at speed v and sphere B is at rest. After the collision, both spheres move at non-zer…
  3. What is the period of a simple pendulum of length L = 0.98 m in a location where g = 9.8 m/s^2 for small amplitude oscillations?
  4. A 0.1 kg bullet traveling horizontally at 400 m/s embeds into a 3.9 kg wooden block initially at rest on a frictionless table. What fraction of the initial kinetic energy is dissipated as heat and def…
  5. In a damped harmonic oscillator, the mechanical energy decreases by 10% in each full cycle. After 3 complete cycles, what percentage of the initial energy remains?
  6. A mass m suspended from a vertical spring oscillates with frequency f. If the spring is cut in half and the same mass m is suspended from one of the halves, what is the new oscillation frequency f'?
  7. Two point charges Q_1 = +4 muC and Q_2 = -9 muC are separated by a distance of 0.5 m in vacuum. Taking k_e = 8.99 * 10^9 N m^2/C^2, what is the magnitude of the electrostatic force between them?
  8. A parallel plate capacitor has plate area A, separation d, and capacitance C_0 in air. If a dielectric slab of dielectric constant kappa = 4 and thickness d/2 is inserted between the plates, what is t…
  9. In a DC circuit, a 12 V battery with internal resistance r = 1 ohm is connected across a resistor R = 5 ohms. What is the terminal voltage across the battery?
  10. Two loops share the resistor R_2 = 3 ohms. Loop 1 contains battery E_1 = 18 V and resistor R_1 = 6 ohms; loop 2 contains battery E_2 = 12 V and resistor R_3 = 6 ohms. Both mesh currents I_1 and I_2 ar…
  11. Three identical resistors of resistance R = 12 ohms each are connected such that two are in parallel and the third is in series with the parallel pair. What is the equivalent resistance of the combina…
  12. An uncharged capacitor C = 50 muF is charged through a resistor R = 100 kohms by a 10 V DC supply. What is the time constant tau and the charge on the capacitor after one time constant?
  13. A hollow conducting spherical shell of inner radius R_1 and outer radius R_2 carries a total charge +Q. What is the electric field at distance r from the center where R_1 < r < R_2 in electrostatic eq…
  14. Two concentric conducting spherical shells have radii a and b (a < b). The inner shell has charge +q and the outer shell is grounded (V = 0). What is the electric potential V(r) of the inner shell rel…
  15. A proton (charge q = 1.6 10^-19 C, mass m = 1.67 10^-27 kg) enters a uniform magnetic field B = 0.5 T perpendicular to the field lines with speed v = 2.0 * 10^6 m/s. What is the radius of its circ…
  16. A straight wire of length L = 0.4 m carries a current of 5 A in a uniform magnetic field of 0.6 T directed at an angle of 30 degrees to the wire. What is the magnitude of the magnetic force on the wir…
  17. A circular coil of 50 turns and radius 0.1 m lies in a magnetic field directed perpendicular to the coil plane. If the field decreases uniformly from 0.8 T to 0.2 T in 0.2 s, what is the induced EMF i…
  18. A conducting rod of length L and mass m slides down frictionless vertical rails connected by a resistor R at the top in a horizontal magnetic field B. What is the terminal velocity v_t of the falling…
  19. In a velocity selector, an electric field E = 1.2 * 10^5 V/m and a magnetic field B = 0.4 T are perpendicular to each other and to the path of charged particles. What speed must a particle have to pas…
  20. What is the magnetic field strength at distance r = 0.05 m from a long straight wire carrying a current I = 10 A in vacuum (mu_0 = 4pi 10^-7 T m/A)?
  21. A rectangular loop of dimensions 0.2 m by 0.3 m and resistance 2 ohms is pulled at constant speed 5 m/s out of a uniform magnetic field B = 1.5 T perpendicular to the loop. What external mechanical po…
  22. A charged particle enters a region with mutually perpendicular electric and magnetic fields E and B with velocity v = E / B, but also has a non-zero velocity component v_parallel along the direction o…
  23. In a photoelectric effect experiment, light of frequency 1.2 10^15 Hz strikes a metal surface with work function Phi = 2.4 eV. Taking h = 4.136 10^-15 eV s, what is the stopping potential V_s?
  24. What is the de Broglie wavelength of an electron (mass m = 9.11 10^-31 kg) accelerated from rest through a potential difference of 100 V (Planck constant h = 6.626 10^-34 J s, e = 1.602 * 10^-19 C…
  25. A monochromatic ray of light in air (n = 1.0) is incident at an angle theta_1 on the face of an equilateral triangular glass prism (n = 1.5) with apex angle 60 degrees. What is the minimum angle of de…
  26. Light travels from crown glass (index of refraction n_1 = 1.52) towards water (index of refraction n_2 = 1.33). What is the critical angle theta_c for total internal reflection at this interface?

Keep practising

More Bagrut (Secondary School Matriculation) topics

All Bagrut (Secondary School Matriculation) practice →

Ready for the full Bagrut (Secondary School Matriculation) test?

Take a mock testBagrut (Secondary School Matriculation) hub
Electromagnetism, Wave Optics and Modern Physics | GetMyMockTest