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

A mechanical or electrical device for measuring time.

  1. Clock

  2. Alarm

  3. Pager

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

A clock is a device used to measure, keep, and indicate time. An alarm is a feature or a specific type of clock, but clock is the broader term for the instrument.

Multiple choice

Which tool is used to measure temperature?

  1. Celsius thermometer

  2. Stopwatch

  3. Pan balance

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

A Celsius thermometer is specifically designed to measure temperature. A stopwatch measures time, a pan balance measures mass, and a meter stick measures length.

Multiple choice

What does the Scoville Heat Unit Scale measure?

  1. The heat of an animal

  2. The heat of a fever

  3. The heat of the desert

  4. The heat of chiles
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Scoville scale measures the concentration of capsaicin, which determines the pungency or heat of chili peppers.

Multiple choice

Which two characteristics should your probe have?

  1. very long & very rigid

  2. disposable & sterile

  3. non-disposable

  4. insulated & very short
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

For hygiene and safety, all probes used in electrolysis must be sterile and disposable to prevent cross-contamination between clients.

Multiple choice physics free, damped and forced oscillations melde's experiment free, forced and damped oscillations sonometer and laws of transverse vibrations

The  apparatus of Melde's experiment can be used to test the relationship between 
A. Tension
B. Mass per unit length 
C. Frequency
D. Wavelength
Choose the most appropriate option among the following?

  1. A, B only

  2. A, C only

  3. A,B,C only

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

Melde's experiment demonstrates the relationship between frequency, tension, mass per unit length, and wavelength (via loop length) in a vibrating string.

Multiple choice the operational amplifier (op-amp) electronics physics properties of an ideal op-amp

In which of the following are operational amplifiers (op-amps) used?

  1. Oscillators

  2. Filters

  3. Instrumentation circuits

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

1.The oscillator circuits consists of a negative gain op-amp and a three section $RC$ network that produced the $180^{o}$phase shift.The phase shift network is connected from op-amp output back to its inverting input.

2. Op-amp  can be used in active filters as a active components.
3. Instrumentation amplifiers is a type of differential amplifiers that has been outfitted with input buffers amplifiers.so, op-amp are used in instrumentational circuits.
Therefore,op-amp can be used as a oscillators,filters and instrumentation circuits.

Multiple choice conversion of time time conversion time measurement of time maths

What unit would you use to measure water?

  1. Hectare

  2. Litre

  3. Gram

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

Hectare and metre are used to measure distances while gram is used to measure mass, and water is measured in terms of volume which is measured as litre.

Multiple choice botany photosynthesis action spectrum and absorption spectrum spectrum of electromagnetic radiation chloroplast and pigments of photosynthesis site of photosynthesis

Which of the following parts of spectrophotometer allows to incident mechanically selected bandwidth for spectroscopy?

  1. Monochromator

  2. Amplifier

  3. Photoresistor

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

Monochromator filters/allows only a single/particular wavelength of light to pass through the solution.

So, the correct answer is 'Monochromator'