- Voltage: The vertical deflection of the electron beam on the screen is directly proportional to the instantaneous input voltage, allowing measurement of peak voltage, peak-to-peak voltage, etc. - Frequency: By setting a known time base (sweep speed) on the horizontal axis, the period (time taken for one cycle) of the waveform can be measured. The frequency is the reciprocal of the period (f = 1/ T). - Phase: By simultaneously displaying two related signals or using the triggering function appropriately, the phase difference between two signals can be determined.
A Cathode Ray Oscilloscope (CRO) is used to measure ______ of a signal.
Asked in TNPSC CS Prelims 2019 · Topic: Measuring Instruments and Scales (Fundamental concepts of measurement: accuracy, precision, and errors (systematic, random, gross))
More Physics questions
- An artificial satellite can be tracked very precisely from the earth by using
- Consider the following actions: 1. Detection of car crash/collision which results in the deployment of airbags almost instantaneously. 2. Detection of accidental free fall of a laptop towards the ground which results in the immediate turning off of the hard drive 3. Detection of the tilt of smartphone which results in the rotation of display between portrait and landscape mode In which of the above actions is the function of a gyroscope is used?
- Laptop accidental free fall Many modern laptops have sensors to detect free fall and suddenly stop the hard drive head to prevent damage upon impact. While accelerometers are primary in detecting the acceleration due to gravity and the subsequent impact deceleration, gyroscopes can be used in conjunction to better characterize the motion (e.g., determining if the laptop is rotating during the fall), improving the accuracy and reliability of the free fall detection system. Thus, the function of a gyroscope can be used. 3. Smartphone tilt for display rotation While the basic detection of static tilt relative to gravity is done by accelerometers, modern smartphones use gyroscopes in combination with accelerometers (IMU) for more accurate, stable, and responsive orientation sensing. The gyroscope measures angular velocity, allowing the phone to detect rotations quickly and smoothly, distinguish intentional rotations from accidental movements, and provide faster screen transitions between portrait and landscape modes. Thus, the function of a gyroscope is used. 15. Automobiles are fitted with a device that shows the distance travelled. Such a device is known as
- Dilatometer is used for the measurement of
- Match List–I with List–II and select the correct answer using the code given below the lists : List–I List–II 1. To measure intensity of (a) Stethoscope light (b) Sphygnomano‐ 2. To check purity of gold meter (c) Caratometer 3. To hear heart sound 4. To measure blood pres‐ (d) Lux meter sure
- The device to measure electric current is
- Which of the following is not correctly matched?
- The device used for measuring electric current in a circuit is called
