# Physics gk question and answer with explanation

1. Which instrument is used to measure altitudes in aircraft's ?
A.Audiometer
B.Ammeter
C.Altimeter
D.Anemometer
Explanation:
Ammeter - Measures strength of electric current.
Audiometer - Measures intensity of sound.
Anemometer - Measures force and velocity of wind and directions.

2. Which instrument is used to measure depth of ocean ?A.Galvanometer
B.Fluxmeter
C.Endoscope
D.Fathometer
Explanation:
Galvanometer - measures electric current,
Fluxmeter - measures magnetic flux,
Endoscope - used to examine internal parts of the body.

3. Name of the instrument to measure atomspheric pressure ?
A.Barometer
B.Barograph
C.Bolometer
D.Callipers
Explanation:
Barograph - Recordings of atmospheric pressure,
Bolometer - Used to measure heat radiation,
Callipers - Used to measure inner and outer diameters of bodies.

4. Which instrument is used to measure the power of electric circuit ?
A.Voltmeter
B.Wattmeter
C.Wavemeter
D.Viscometer
Explanation:
Voltmeter - is used to measure electric potential difference between two points,
Wavemeter - is used to measure the wavelength of a radiowave,
Viscometer - is used measure viscosity of liquid.

5. Which instrument is used in submarine to see the objects above sea level ?
A.Pykometer
B.Polygraph
C.Photometer
D.Periscope

6. Which instrument is used to measure curvature of spherical objects ?
A.Spectroscope
B.Spherometer
C.Spectrometer
D.Sextant
Explanation:
Spectroscope - used to record spectra,
Spectrometer - used to measure the position of spectral lines,
Sextant - used to measure the height of very distant objects and also used by navigators to find the latitude.
7. Which instrument is used to record physical happenings at a distant place ?
A.Thermostat
B.Tonometer
C.Telemeter
D.Transponder