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 biology human body and organ system blood pressure circulatory system transportation in animal and plants

The instrument used for measuring blood pressure is known as

  1. ECG.

  2. Stethoscope.

  3. Sphygmomanometer.

  4. EEG.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The instrument used for measuring blood pressure is known as sphygmomanometer. The blood pressure in the measured in mm of Hg (millimetres of mercury) and recorded with systolic number first followed by diastolic. A normal blood pressure recorded would be 120/80 mm Hg.
So, the correct answer is 'Sphygmomanometer'.
Multiple choice biology human body and organ system blood pressure circulatory system transportation in animal and plants

Blood pressure is measured by

  1. Sphygmomanometer

  2. Phonocardiogram

  3. Electrocardiogram

  4. Stethoscope
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A. Sphygmomanometer is an instrument that measures blood pressure.
B. Phonocardiogram is a record or plot of sounds of heart.
C. Electrocardiogram is a record of electrical activity or the electric current that moves through the heart during a heart beat.
D. Stethoscope is a device by which internal sounds of body are heard.
So, the correct answer is 'Sphygmomanometer'.
Multiple choice biology human body and organ system blood pressure circulatory system transportation in animal and plants

First sound recorded in sphygmomanometer indicates

  1. Systolic pressure

  2. Diastolic pressure

  3. Lubb

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

When using a sphygmomanometer, the first sound heard (Korotkoff sound) as the cuff pressure is released corresponds to the systolic pressure. This is when the blood first begins to flow through the artery again.

Multiple choice biology human body and organ system blood pressure circulatory system transportation in animal and plants

Fill in the blanks with suitable words given below:
The instrument used to find out the blood pressure is known as ______

  1. Serum

  2. Fibrinogen

  3. Hemoglobin

  4. Pulmonary

  5. Sphygmomanometer

  6. Ventricles
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The instrument used to find out the blood pressure is known as a sphygmomanometer. It is a device composed of an inflatable cuff which displays the pressure measured in mm Hg on the mechanical manometer. 

Hence, the correct answer is 'Sphygmomanometer' .

Multiple choice biology human body and organ system blood pressure circulatory system transportation in animal and plants

Choose correct alternative in the following statements:
Sphygmomanometer measures

  1. Pulse rate

  2. Heart beat

  3. Blood pressure

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

The sphygmomanometer is a device used to measure blood pressure. It consists of an inflatable cuff, a measuring unit and a mechanism for inflation which may be a manually operated bulb and a valve operated electrically.

Hence, the correct answer is 'Blood pressure' .

Multiple choice physics fluids pressure in fluids pressure in liquids introduction to pressure

A barometer which measures atmospheric pressure more accurately is ..........

  1. Fortin's barometer

  2. mercury barometer

  3. anaeroid barometer

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

A barometer which measures atmospheric pressure most accurately is mercury barometer.

Hence, option B is correct.

Multiple choice botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

Passage of ascent of sap is shown by

  1. Osmometer

  2. Porometer

  3. Manometer

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

Dixon and jolly demonstrated the process of translocation of  water and minerals from base to apex of the plant and is known as the ascent of sap as proposed by Dixon and Jolly. The complex tissue xylem in plants is responsible for translocation water and minerals in plants. In blockage experiment, two small shoots of a woody plant are taken. Their cut ends are so prepared that in one shoot phloem is blocked with wax, while in the other xylem is blocked. Now the cut ends are submerged in water. After some time, the shoot with its xylem blocked shows wilting, but the shoot with its phloem blocked remains unaffected.

Multiple choice bio-chemistry absorption by roots - the processes involved osmotic relations of plant cells transport across membrane imbibition and its importance

OP of a solution can be measured by 

  1. Photometer

  2. Osmometer

  3. Calorimeter

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

An osmometer is a device for measuring the osmotic strength of a solution.
Photometer is an instrument for measuring the intensity of light.

A calorimeter is an object used in the process of measuring the heat capacity. 
Plasmolysis is the contraction of the protoplast of a plant cell as a result of loss of water from the cell.
Thus, the correct answer is option (B). 

Multiple choice bio-chemistry absorption by roots - the processes involved osmotic relations of plant cells transport across membrane imbibition and its importance

OP of a cell can be measured by 

  1. Manometer

  2. Photometer

  3. Calorimeter

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

Manometer is a device that is used to measure pressure. Photometer is a device that is used to the intensity of light. Calorimeter is a device that is used to measure the amount of heat involved in a reaction. Osmotic pressure is the pressure that must be applied in order to prevent the passage of solvent due to osmosis. The OP of a cell can be measured by plasmolysis. The OP of a cell is equal to the OP of a solution that results in the incipient plasmolysis in the cell.

Thus, the correct answer is option D.

Multiple choice physics effects of electric current electric generator ac generator magnetic effects of electric current

A device for producing electric current is ________.

  1. Ammeter

  2. Voltmeter

  3. Generator

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

Generator is the device used for the production of electric current.

It works on the principle of Faraday's laws of Electromagnetic induction in which due to the change in the magnetic flux linked with the coil there is potential induced in the coil and since the circuit is closed the current flows throw the circuit.
Generator can be AC or DC type. It is an active device and acts as the source for current.

Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

Microwaves are detected by

  1. barometer

  2. point contact diodes

  3. thermopiles

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

Point contact diodes, commonly called crystals, are the oldest microwave semiconductor devices. Unlike the pn-junction diode, the point-contact diode depends on the pressure of contact between a point and a semiconductor crystal for its operation.One section of the diode consists of a small rectangular crystal of n-type silicon. A fine beryllium-copper, bronze-phosphor, or tungsten wire presses against the crystal and forms the other part of the diode During the manufacture of the point contact diode, a relatively large current is passed from the the wire to the silicon crystal. The result of this large current is the formation of a small region of p-type material around the crystal in the vicinity of the point contact. Thus, a pn-junction is formed which behaves in the same way as a normal pn-junction. The pointed wire is used instead of a flat metal plate to produce a high-intensity electric field at the point contact without using a large external source voltage.

Multiple choice

Which chemical engineering principle is concerned with the design and operation of equipment for the measurement and control of process variables?

  1. Instrumentation

  2. Control Systems

  3. Sensors

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

Instrumentation involves the design and operation of equipment used to measure and control process variables such as temperature, pressure, flow rate, and composition.