Q.51)-A seconds pendulum is a pendulum whose time period is-----
- 1 sec
- 4 sec
- 3 sec
- 2 sec
Q.52)-What is the motion which repeats itself after regular intervel of time?
- Periodic Motion
- Simple Harmonic Motion
- Undamping Motion
- Vibratory Motion
Q.53)-______ are used for communication in artificial satellites.
- Infrared waves
- Radio waves
- Ultraviolet rays
- Amplitude Modulation waves
Q.54)-What is the distance between a crest and a consecutive trough in a transverse wave?
- Wavelength
- Amplitude
- Half of the wavelength
- Twice of wavelength
Q.55)-Which one of the following is not a property of electromagnetic waves?
- Electromagnetic waves do not show interference and diffraction
- Oscillating electric field and magnetic field are perpendicular to each other
- Electromagnetic waves are transverse waves
- Electromagnetic waves do not require a medium to propagate
Q.56)-The time taken by a pendulum to complete one oscillation is called its?
- Maximum speed
- Average speed
- Time period
- Time interval