Physics ยท 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

Which of the following is a common method for measuring groundwater transmissivity?

  1. Pumping tests

  2. Slug tests

  3. Borehole flowmeter tests

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

Pumping tests are a common method for measuring groundwater transmissivity.

Multiple choice

Which of the following instruments is used to measure the altitude of the Sun?

  1. Aryabhata Yantra

  2. Gnomon

  3. Sundial

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

The Quadrant is used to measure the altitude of the Sun.

Multiple choice

Which of the following is a common method for measuring the flow rate of oil and gas?

  1. Orifice meters

  2. Venturi meters

  3. Ultrasonic flow meters

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

Orifice meters, Venturi meters, and ultrasonic flow meters are all common methods for measuring the flow rate of oil and gas.

Multiple choice

What type of sensor is used to measure the speed and spin of a ball in sports?

  1. Load cell

  2. Strain gauge

  3. Photoelectric sensor

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

Radar technology is used to measure the speed and spin of a ball in sports by emitting radio waves and analyzing the reflected signals.

Multiple choice

What type of sensor is used to measure the force applied to a sports equipment?

  1. Load cell

  2. Strain gauge

  3. Accelerometer

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

Load cells are used to measure the force applied to a sports equipment, such as a tennis racket or a golf club.

Multiple choice

What is the most common type of data acquisition system?

  1. Analog-to-digital converter (ADC)

  2. Digital-to-analog converter (DAC)

  3. Programmable logic controller (PLC)

  4. Distributed control system (DCS)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Analog-to-digital converters (ADCs) are the most common type of data acquisition system. They convert analog signals from sensors into digital signals that can be processed by a computer.

Multiple choice

What is the sampling rate of a data acquisition system?

  1. The number of samples taken per second

  2. The maximum frequency that can be measured

  3. The minimum frequency that can be measured

  4. The accuracy of the measurements
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The sampling rate of a data acquisition system is the number of samples taken per second. The higher the sampling rate, the more accurately the signal can be reconstructed.

Multiple choice

Which of the following is a primary standard for voltage measurement?

  1. Voltmeter

  2. Standard Cell

  3. Potentiometer

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

A standard cell is a primary standard for voltage measurement because it provides a highly stable and accurate reference voltage.

Multiple choice

The accuracy of a measurement is determined by:

  1. Precision

  2. Resolution

  3. Sensitivity

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

Precision refers to the closeness of a set of measurements to each other, while accuracy refers to the closeness of a measurement to the true value. Therefore, precision is a determining factor for accuracy.

Multiple choice

Which instrument is used to measure alternating current (AC)?

  1. Ammeter

  2. Voltmeter

  3. Ohmmeter

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

An ammeter is used to measure alternating current (AC) by measuring the flow of charge through a circuit.

Multiple choice

Which of the following instruments is used to measure resistance?

  1. Voltmeter

  2. Ammeter

  3. Ohmmeter

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

An ohmmeter is used to measure resistance by applying a known voltage across a circuit and measuring the resulting current.

Multiple choice

Which of the following is a type of transducer that converts mechanical motion into an electrical signal?

  1. Thermocouple

  2. Strain Gauge

  3. Photodiode

  4. Hall Effect Sensor
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A strain gauge is a type of transducer that converts mechanical motion into an electrical signal by measuring the change in resistance of a conductor when it is subjected to strain.

Multiple choice

Which of the following is a type of digital multimeter (DMM)?

  1. Analog Multimeter

  2. True RMS Multimeter

  3. Clamp Meter

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

A true RMS multimeter is a type of digital multimeter that measures the true root mean square (RMS) value of an AC signal, providing a more accurate reading than an average-responding multimeter.

Multiple choice

Which of the following is a type of oscilloscope?

  1. Analog Oscilloscope

  2. Digital Oscilloscope

  3. Mixed-Signal Oscilloscope

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

A digital oscilloscope is a type of oscilloscope that uses analog-to-digital conversion (ADC) to convert the input signal into a digital signal, allowing for more precise measurements and analysis.

Multiple choice

The resolution of a digital instrument refers to its ability to:

  1. Measure small changes in a signal

  2. Measure signals over a wide range

  3. Measure signals with high accuracy

  4. Display measurements in a clear and readable format
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The resolution of a digital instrument refers to its ability to measure small changes in a signal, typically expressed in the number of digits or bits used to represent the measurement.