Study

PHYSICS (waves, motion, electricity)

  •   0%
  •  0     0     0

      Back   Restart
  • Define current.
    The flow of electric charge.
  • Newton (N).
    Work done is force multiplied by distance in the direction of the force.
  • What is the unit of frequency?
    Hertz (Hz)
  • What is the unit of electric charge?
    Coulomb (C).
  • What is the SI unit of force?
    Newton (N).
  • How does resistance change with the length of a wire?
    Resistance increases as length increases.
  • What is the speed of electromagnetic waves in a vacuum?
    3×10^8 m/s.
  • Define acceleration.
    The rate of change of velocity.
  • Differentiate between transverse and longitudinal waves.
    Transverse: Oscillations are perpendicular to wave direction. Longitudinal: Oscillations are parallel to wave direction.
  • What is the formula for wave speed?
    Wave speed = frequency × wavelength
  • What property of a wave changes when it enters a denser medium?
    Speed and wavelength decrease.
  • State the units for speed, velocity, and acceleration.
    Speed: m/s, Velocity: m/s, Acceleration: m/s2 .
  • What is the formula for calculating speed?
    Speed= distance/time
  • What happens to the frequency of a wave during refraction?
    It remains constant.
  • What is the unit of resistance?
    Ohm (Ω).
  • What is the formula for kinetic energy?
    KE= 1/2 ​mv2
  • What is the difference between series and parallel circuits?
    Series: Single path for current. Parallel: Multiple paths.
  • State the formula for electrical power.
    P=IV
  • Name two examples of longitudinal waves.
    Sound waves, seismic P-waves.
  • What is the function of a fuse?
    To protect a circuit by breaking it if current is too high.
    • Your experience on this site will be improved by allowing cookies.