AS Physics OCR Revision

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1. What is the Ultraviolet Catastrophe?

  • The graph showing the wavelengths of the blackbody diagrams that showed unexpected bell-shaped curves instead of an infinite negative correlation
  • The ionising nature of ultraviolet light that can cause harm to humans
  • The process of electrons being knocked off and causing an electric current to flow when an ultraviolet light is shined on the surface of a conductive, negatively charged metal
  • The diffraction pattern caused by shining an ultraviolet light at a double slit
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2. What are the four SUVAT equations?

  • S=2V, V=U+2S-A, 2T=-U+V^2, S=T(2U+V)
  • v^2=U^2+2AS, S=UT+1/2AT^2, v=U+AT, S= 1/2(U+V)T
  • 2V=2U+2AS, S=T+(2AT)^2, V=U-AT, S="(UV)+T

3. What is a vector?

  • A force with a magnitude
  • A force that only has a vertical component
  • A force with a direction and magnitude
  • A force with a direction

4. What is Ohm's Law?

  • I=VR
  • I=P/V
  • V=IR
  • R=P/V

5. What is Planck's constant?

  • 6.02x10^26
  • 6.626x10^34
  • 1.19x10^-19
  • 6.634x10^-34
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