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Twelfth Grade (Grade 12) Physics Questions

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Grade 12 Physics
Which of the following statements is true about energy transformation in a gravitational field?
  1. Gravitational potential energy can transform into kinetic energy during free fall.
  2. Kinetic energy transforms into gravitational potential energy as an object falls.
  3. Gravitational potential energy transforms into electrical energy as an object falls.
  4. Kinetic energy and potential energy cannot transform into each other.
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
Grade 12 Physics
What makes CT scans quicker than MRI scans in emergencies?
  1. CT scans require less detail for soft tissue imaging
  2. CT scans involve simpler technology
  3. CT scans capture images in seconds
  4. CT scans do not use magnetic fields
Grade 12 Physics
Which of the following is NOT true about MRI?
  1. MRI is ideal for soft tissue imaging
  2. MRI uses ionizing radiation like X-rays
  3. MRI can be uncomfortable for claustrophobic patients
  4. MRI scans take longer than CT scans
Grade 12 Physics
What is used in MRI to align hydrogen atoms in the body?
  1. X-rays
  2. Gamma rays
  3. Magnetic fields
  4. Ultrasound waves
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