Measuring Devices and Scales

SONAR [ Sound Navigation and Ranging ] is used for locating submerged objects in an ocean. It is based on a very simple principle i.e pulse of ultrasonic waves is sent into the water, it strikes the target and bounced back towards the source.It helps to detect or locate the submerged and icebergs.

SONAR [ Sound Navigation and Ranging ] is used for locating submerged objects in an ocean. It is based on a very simple principle i.e pulse of ultrasonic waves is sent into the water, it strikes the target and bounced back towards the source.It helps to detect or locate the submerged and icebergs.

SONAR [ Sound Navigation and Ranging ] is used for locating submerged objects in an ocean. It is based on a very simple principle i.e pulse of ultrasonic waves is sent into the water, it strikes the target and bounced back towards the source.It helps to detect or locate the submerged and icebergs.

An audiometer is used to measure the intensity of sound ,while the audiophone is a type of small hearing aid. Anemometer is used to measure the wind speed and wind pressure. Chronometer is a timepiece or timing device .

An audiometer is used to measure the intensity of sound ,while the audiophone is a type of small hearing aid. Anemometer is used to measure the wind speed and wind pressure. Chronometer is a timepiece or timing device .

An audiometer is used to measure the intensity of sound ,while the audiophone is a type of small hearing aid. Anemometer is used to measure the wind speed and wind pressure. Chronometer is a timepiece or timing device .

An audiometer is used to measure the intensity of sound ,while the audiophone is a type of small hearing aid. Anemometer is used to measure the wind speed and wind pressure. Chronometer is a timepiece or timing device .

Tachometer is a type of theodolite used for rapid measurement and determine electronically or electro-optically, the distance to target and is highly automated in its operation. The remaining pairs are correctly matched. Pyrometer is used to measuring the relativity high temperature i.e furnaces.Anemometer is used to measure the speed the of wind. An Ammeter is a measuring instrument used to measure electric current in circuit.

Tachometer is a type of theodolite used for rapid measurement and determine electronically or electro-optically, the distance to target and is highly automated in its operation. The remaining pairs are correctly matched. Pyrometer is used to measuring the relativity high temperature i.e furnaces.Anemometer is used to measure the speed the of wind. An Ammeter is a measuring instrument used to measure electric current in circuit.

Galvanometer is an instrument used to measure the small electric current or a function of the current by deflection of a moving coil.The deflection is a mechanical rotation derived from forces resulting from the current .Hence, the option (d) is not correctly matched. Rest are correctly matched.