a levels physics problems

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Number of conduction electrons per unit volume is

Number of conduction electrons per unit volume is
  • A. electron number
  • B. number density
  • C. proton number
  • D. neutron number
  • Correct Answer: Option B

If two quantizes are inversely proportional then graph between y and 1/x gives

If two quantizes are inversely proportional then graph between y and 1/x gives
  • A. straight line cutting axis
  • B. straight line through origin
  • C. a parabolic curve
  • D. a hyperbolic curve
  • Correct Answer: Option B

A train with a whistle that emits a note of frequency 800 Hz is approaching an observer at speed of 60 m s-1, frequency of note heard by observer is

A train with a whistle that emits a note of frequency 800 Hz is approaching an observer at speed of 60 m s-1, frequency of note heard by observer is
  • A. 978 Hz
  • B. 980 Hz
  • C. 950 Hz
  • D. 900 Hz
  • Correct Answer: Option A

A rectangle-shaped open-to-sky tank of water has a length of 2 m and a width of 1 m. If atmospheric pressure is assumed to be 100 kPa and thickness of tank walls is assumed to be negligible, force exerted by atmosphere on surface of water is

A rectangle-shaped open-to-sky tank of water has a length of 2 m and a width of 1 m. If atmospheric pressure is assumed to be 100 kPa and thickness of tank walls is assumed to be negligible, force exerted by atmosphere on surface of water is
  • A. 20 kN
  • B. 50 kN
  • C. 100 kN
  • D. 200 kN
  • Correct Answer: Option D

If a student drops a stone from a cliff of height 30 m and time it takes to reach ground is 2.6 s, then acceleration due to gravity is

If a student drops a stone from a cliff of height 30 m and time it takes to reach ground is 2.6 s, then acceleration due to gravity is
  • A. None
  • B. None
  • C. None
  • D. None
  • Correct Answer: Option D