Physics · General Awareness

Physics Measuring Instruments

1,123 Questions

Physics measuring instruments are essential tools used to measure various physical quantities. This topic covers devices like hygrometers, oscilloscopes, and sphygmomanometers. It is a highly scoring section in general science and general awareness examinations.

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Physics Measuring Instruments Questions

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

Match the following.

List-I(Measuring Instruments) List-II(Which measure)
A. Anemometer $1$. Motor Power
B. Tachometer $2$. Wind speed
C. Dynamometer $3$. Revolutions per minute
D. Barometer $4$. Atmospheric pressure
$5$. Current from a dynamo
  1. A-$2$, B-$3$, C-$1$, D-$4$
  2. A-$2$, B-$1$, C-$3$, D-$4$
  3. A-$1$, B-$3$, C-$5$, D-$4$
  4. A-$1$, B-$3$, C-$5$, D-$2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Anemometers measure wind speed (A-2), tachometers measure RPM (B-3), dynamometers measure power/force (C-1), and barometers measure atmospheric pressure (D-4). This matches option A.

Multiple choice physics electric current, potential difference and resistance electric potential and potential difference potential difference current in electric circuits

The device used for producing current is called a _____.

  1. Voltmeter

  2. Ammeter

  3. Galvanometer

  4. Generator
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In electricity generation A generator is a device which uses mechanical energy to produce electrical energy which flows in form of electric current in circuits. hence Generator can produce current.

Multiple choice biology modern agriculture modern equipments in agriculture soil quality methods of crop production

Which of the following tool is used for measuring the draft of agricultural implements? 

  1. Dynamometer

  2. Hydrometer

  3. Galvanometer

  4. Barometer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

(A) Dynamometer- It is an instrument/device used for measuring mechanical force or power transmitted by a rotating shaft. For example, it is used to calculate the power produced by a motor or an engine in agricultural fields

(B) Hydrometer- It is a device used for measuring the relative density of liquids. It is made up of a thin glass tube and consists a bulb which floats upright.
(C) Galvanometer- It is a device used for measuring or detecting the flow of electric current through an electric circuit.
(D) Barometer- It is a device used to measure atmospheric pressure. This device is mostly used by the weather forecasters to predict the changes in the weather.
So, the correct option is 'Dyanamometer'.

Multiple choice botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

Which of the following instrument can be used to record plant growth by seconds?

  1. Porometer

  2. Potometer

  3. Pressure bomb

  4. Crescograph
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A crescograph is a device for measuring growth in plants. It was invented in the early 20th century by Sir Jagadish Chandra Bose. The Bose crescograph uses a series of clockwork gears and a smoked glass plate to record the movement of the tip of a plant (or its roots) at magnifications of up to 10,000. Marks are made on the plate at intervals of a few seconds, demonstrating how the rate of growth varies under varying stimuli. Bose experimented with temperature, chemicals, gases and electricity.

Thus, the correct answer is option D.

Multiple choice physics study of sound reverberation applications of reflection of sound multiple reflection of sound and reverberation applications of ultrasound

Select the instrument that works on the principle of multiple reflection of sound.

  1. Watthour meter

  2. Sonar

  3. Stethoscope

  4. Decibel meter
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sound of a heartbeat ( or lungs ) reaches the doctor's ears by the multiple reflections of sound waves though the stethoscope tube.

Multiple choice various types of barometer fluids physics

Fortin's Barometer is used to measure.

  1. Force

  2. Atmospheric pressure

  3. Temperature

  4. All
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fortin's barometer is used to measure atmospheric pressure. It is a modified form of Torricelli's simple barometer.

Multiple choice various types of barometer fluids physics
Aneroid word in Aneroid barometer means

  1. Wet

  2. Moist

  3. Dry

  4. Overflowing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

'Aneroid' means dry. Aneroid barometers are those barometers that do no require any fluid to work and measure atmospheric pressure. Hence they are called dry barometers due to this absence of any fluid(specially liquid).

Multiple choice various types of barometer fluids physics

Mark the correct advantage of fortin's barometer.

  1. It is portable

  2. It a makes move accurate reading than simple barometer

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fortin's barometer is widely used in laboratories and in meteorological departments. Main advantage of Fortin's barometer is it is portable and it allows the mercury level in the cistern to be set to zero. this makes the reading move accurate.

Multiple choice various types of barometer fluids physics

Barometer which does not use any liquid is known as _________ barometer

  1. fortin's

  2. aneroid

  3. simple

  4. none
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Aneroid barometer uses a small, flexible metal box called an aneroid cell (capsule). The evacuated capsule (or usually several capsules, stacked to add up their movements) is prevented from collapsing by a strong spring. Small changes in external air pressure cause the cell to expand or contract. This expansion and contraction drives mechanical levers such that the tiny movements of the capsule are amplified and displayed on the face of the aneroid barometer. 

Multiple choice various types of barometer fluids physics

Which of the following is not used in an aneroid barometer?

  1. Thin material sheet.

  2. Vacuum chamber

  3. Permanent magnet.

  4. Levers.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Aneroid barometer consists of:

1. A thin material sheet used as a top.
2. Vacuum chamber.
3. Levers.
4. Pointer.
5. Calibration scale.

Multiple choice various types of barometer fluids physics

Aneroid barometer

  1. uses liquid

  2. do not use any liquid

  3. both

  4. none
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A barometer is an instrument used to measure atmospheric pressure. The two types are liquid and aneroid barometer. Aneroid barometer do not use any liquid.

Multiple choice various types of barometer fluids physics

Which of the following is not a disadvantage of mercury barometer?

  1. Mercury does not stick to glass.

  2. It has a long glass tube and cannot be easily carried from one place to another.

  3. It requires zero adjustment before taking the reading.

  4. The barometer tube needs to be kept vertical to get the correct reading.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mercury barometer has the following disadvantages:

1. It has a long glass tube with no protection to it. So, it cannot be easily carried from one place to another.
2. It requires zero adjustment before taking the reading.
3. The barometer must be kept vertical to get the correct reading.
4. The container in which the glass tube is inverted is open from the top. So, the impurities may fall into it making the mercury impure.

Multiple choice various types of barometer fluids physics

The pointer of aneroid barometer should be

  1. Light

  2. Frictionless

  3. Pointed

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Light needle and system increases sensitivity of the barometer. Frictionless needle improves the efficiency of the system. Pointed needle improves accuracy and removes human errors.