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Twelfth Grade (Grade 12) Physics Questions

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Grade 12 Physics
How are valence electrons represented in Lewis dot structures?
  1. As lines connecting atoms
  2. As dots surrounding the atomic symbol
  3. As circles within the electron cloud
  4. As arrows pointing towards the nucleus
Grade 12 Physics
What is the significance of groups in the periodic table?
  1. Elements in the same group have similar atomic mass.
  2. Elements in the same group have the same number of valence electrons.
  3. Elements in the same group have the same number of protons.
  4. Elements in the same group have the same atomic size.
Grade 12 Physics
In a digital system, a wave pulse represents the transition between which two states?
  1. High and low voltage
  2. Positive and negative voltage
  3. Constant voltage and no voltage
  4. Stable and unstable voltage
Grade 12 Physics
Which part of a computer chip controls the timing and synchronization of digitized signals?
  1. Data bus
  2. Clock signal
  3. Transistor array
  4. Memory controller
Grade 12 Physics
In binary, the digit '1' typically represents which state in a digital signal?
  1. Low voltage
  2. High voltage
  3. No voltage
  4. Negative voltage
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