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Twelfth Grade (Grade 12) Physics Questions

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Grade 12 Physics
What is the beat frequency equal to?
  1. The sum of the frequencies of the two waves
  2. The product of the frequencies of the two waves
  3. The average of the frequencies of the two waves
  4. The difference between the frequencies of the two waves
Grade 12 Physics
Which factor does not affect the magnitude of the Doppler shift for sound waves?
  1. The speed of sound in the medium
  2. The relative motion between the source and the observer
  3. The frequency of the source
  4. The observer's hearing ability
Grade 12 Physics
How does the speed of sound in air change with increasing temperature?
  1. Decreases
  2. Increases
  3. Remains constant
  4. May increase or decrease depending on other factors
Grade 12 Physics
What are regions of higher air pressure in a sound wave called?
  1. Rarefactions
  2. Compressions
  3. Nodes
  4. Antinodes
Grade 12 Physics
In which medium does sound travel the fastest?
  1. Air
  2. Water
  3. Steel
  4. Vacuum
Grade 12 Physics
What type of motion do S-waves exhibit?
  1. Compression and rarefaction
  2. Rolling elliptical motion
  3. Horizontal side-to-side motion
  4. Shear movement perpendicular to wave propagation
Grade 12 Physics
What happens to the size of circular orbits as you move deeper into the water?
  1. They become larger
  2. They remain the same
  3. They become smaller
  4. They become unpredictable
Grade 12 Physics
Why do sound waves diffract more easily around obstacles than light waves?
  1. Sound waves have longer wavelengths than light waves
  2. Sound waves are more energetic than light waves
  3. Sound waves are mechanical, and light waves are not
  4. Light waves cannot pass through obstacles
Grade 12 Physics
What type of boundary causes a wave to reflect back with its phase inverted?
  1. Free boundary
  2. Fixed boundary
  3. Open boundary
  4. No boundary
Grade 12 Physics
What happens to a wave’s speed as it enters shallow water and interacts with the seabed?
  1. The wave’s speed increases.
  2. The wave’s speed decreases.
  3. The wave’s speed remains constant.
  4. The wave changes direction.
Grade 12 Physics
When the body is in motion, it's                always changes.
  1. Velocity
  2. acceleration
  3. Momentum
  4. Position vector
Grade 12 Physics
Who described the atomic structure as a positively charged sphere with embedded electrons?
  1. John Dalton
  2. J.J. Thomson
  3. Niels Bohr
  4. Ernest Rutherford
Grade 12 Physics
Which type of external force is associated with the attraction between masses?
  1. Frictional Forces
  2. Magnetic Fields
  3. Gravitational Forces
  4. Thermal Expansion
Grade 12 Physics
Which component of Earth's magnetic field is an imaginary line where the magnetic field is horizontal?
  1. Magnetic Poles
  2. Magnetic Equator
  3. Magnetosphere
  4. Geodynamo
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