Scientific Instruments

Which instrument maintains a constant temperature?

1. Thermostat
2. Thermostat
3. Hygrometer
4. Voltmeter

What amplifies electric current?

1. Amplifier
2. Transistor
3. Voltmeter
4. Galvanometer

Which instrument measures the potential difference between two points?

1. Voltmeter
2. Electroscope
3. Ammeter
4. Tachometer

Which instrument is used to measure the flow of air?

1. Barometer
2. Anemometer
3. Thermometer
4. Hygrometer

Which instrument is used to measure the density of gases?

1. Thermometer
2. Hygrometer
3. Aerometer
4. Barometer

What instrument measures radiant energy?

1. Luxmeter
2. Radiometer
3. Photoelectric cell
4. Thermometer

Which instrument is used to convert rays into mechanical energy?

1. Radiator
2. Radiator
3. Thermometer
4. Luxmeter

What instrument is used to measure the intensity of light?

1. Luxmeter
2. Photodiode
3. Barometer
4. Thermometer

Which instrument measures the amount of light?

1. Illuminometer
2. Luxmeter
3. Photodiode
4. Spectrometer

Which instrument is used for observing very small and near objects?

1. Telescope
2. Magnifying lens
3. Microscope
4. Barometer