Scientific Instruments— Concepts, Formulas & Shortcuts
- Barometer — atmospheric pressure; thermometer — temperature.
- Hygrometer — humidity; anemometer — wind speed.
- Seismograph — earthquakes; altimeter — altitude.
- Ammeter — electric current; voltmeter — potential difference.
- Lactometer — purity of milk; hydrometer — density of liquids.
- Sphygmomanometer — blood pressure; stethoscope — heart and lung sounds.
Scientific Instruments Practice Questions with Answers
Attempt each question first, then open the explanation. All 10 questions below are free to read and require no signup.
Q1.A barometer is used to measure:
Easy- ATemperature
- BAtmospheric pressure
- CHumidity
- DWind speed
Scientific Instruments question 1 of 10+Show Answer & Explanation
Answer: B. Atmospheric pressure
Explanation: Barometers measure the pressure exerted by the atmosphere.
Q2.A hygrometer measures:
Moderate- APressure
- BHumidity
- CRainfall
- DAltitude
Scientific Instruments question 2 of 10+Show Answer & Explanation
Answer: B. Humidity
Explanation: Hygro- refers to moisture, so a hygrometer measures atmospheric humidity.
Q3.An anemometer is used to measure:
Moderate- AWind speed
- BSound intensity
- CLight intensity
- DDepth
Scientific Instruments question 3 of 10+Show Answer & Explanation
Answer: A. Wind speed
Explanation: Anemo- means wind; the instrument records wind speed.
Q4.A seismograph records:
Easy- AOcean currents
- BEarthquakes
- CRainfall
- DAir pollution
Scientific Instruments question 4 of 10+Show Answer & Explanation
Answer: B. Earthquakes
Explanation: Seismographs detect and record the ground motion of earthquakes.
Q5.An ammeter is used to measure:
Easy- AVoltage
- BResistance
- CElectric current
- DPower
Scientific Instruments question 5 of 10+Show Answer & Explanation
Answer: C. Electric current
Explanation: An ammeter measures current and is connected in series in a circuit.
Q6.A lactometer is used to check the:
Moderate- APurity of milk
- BAcidity of soil
- CDepth of water
- DSpeed of sound
Scientific Instruments question 6 of 10+Show Answer & Explanation
Answer: A. Purity of milk
Explanation: A lactometer measures the relative density of milk to detect dilution.
Q7.An altimeter measures:
Moderate- ATemperature
- BAltitude
- CHumidity
- DAir speed
Scientific Instruments question 7 of 10+Show Answer & Explanation
Answer: B. Altitude
Explanation: Altimeters indicate height above a reference level, usually sea level.
Q8.Blood pressure is measured using a:
Moderate- AStethoscope
- BSphygmomanometer
- CThermometer
- DBarometer
Scientific Instruments question 8 of 10+Show Answer & Explanation
Answer: B. Sphygmomanometer
Explanation: A sphygmomanometer measures arterial blood pressure using an inflatable cuff.
Q9.A voltmeter is connected in a circuit:
Difficult- AIn series
- BIn parallel
- CDiagonally
- DExternally
Scientific Instruments question 9 of 10+Show Answer & Explanation
Answer: B. In parallel
Explanation: A voltmeter measures potential difference and must be connected across the component in parallel.
Q10.A hydrometer is used to measure the:
Moderate- ADensity of liquids
- BVolume of gases
- CWeight of solids
- DSpeed of flow
Scientific Instruments question 10 of 10+Show Answer & Explanation
Answer: A. Density of liquids
Explanation: A hydrometer floats in a liquid and indicates its relative density.
Scientific Instruments — Frequently Asked Questions
How can I remember instrument names easily?+
Use the root. Baro- means weight or pressure, thermo- means heat, hygro- means moisture, anemo- means wind and seismo- means shaking. The root names the quantity being measured.
What is the difference between an ammeter and a voltmeter?+
An ammeter measures current and is connected in series; a voltmeter measures potential difference and is connected in parallel across a component.
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