Ediograph
Pantagraph
Ergograph
Seismograph
The instrument used in aircrafts to measure the altitude above a fixed level is:
The instrument used to measure the speed of the wind is
The instrument which uses sound waves to measure the depth of oceans is
The insulation resistance of cables, transformers etc is measured by following instrument
The intensity of sound at a point is _ its distance from the source
The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?
The internal resistance of all milliammeter must be very low for
The internal resistance of the voltmeter must be very high in order to have
The ISI mark on an electrical appliance ensures that the _.
The isotope of Uranium used in atomic reactors is
