Quartz Clocks
Motion and Time of Class 7
The quartz clock is based on an electric property of the quartz crystal it is due to the electric filed. The properties of quartz is change when an electric field is applied to a quartz crystal.When placed in an electronic circuit, the interaction between the mechanical stress and the electrical field causes the crystal to vibrate and due to this it generates a constant electric signal which is used to measure time.
- Introduction
- Measuring time by the Sun the Moon and the Stars
- Oil Lamps
- Candle Clocks
- Water Clocks
- Hour Glasses or Sandglasses
- The Merkhet
- Why 24 hours in a day
- Quartz Clocks
- Cesium Atomic Clock
- Modern Time Keeping
- Motion
- Translation motion
- Rotational motion
- Rectilinear motion
- Curvilinear motion
- Oscillatory/Vibratory motion
- Vibratory motion
- Random motion
- Accelerating Motion & Falling
- Distance & Displacement
- Acceleration
- solved questions
- Exercise-1
