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What is the function of a Carey foster bridge?
A Carey-foster's bridge is a modified version of the meter bridge (wheatstone bridge or potentiometer). It can be used to find out the average resistance per unit length of the meter bridge wire and hence find out the unknown resistance. It is more accurate and more sensitive than a meter bridge.
What is the difference between an auto-meter and a tachometer?
A tachometer and an auto-meter is an instrument measuring the rotation speed of a car or a motor. An auto-meter is more accurate and reliable than a tachometer.
Why do you use a meter bridge for measurements rather than a voltmeter and ammeter?
A meter bridge is used in some cases for precise resistance measurements. It can be more accurate than using a voltmeter and ammeter because it eliminates errors from contact resistance and internal resistance of the instruments. This method allows for more accurate determination of resistance by comparing two resistance values directly.
WHY CAREY FOSTER BRIDGE IS MORE ACCURATE AND SENSITIVE THAN METER BRIDGE?
The Carey Foster Bridge is more accurate and sensitive than the meter bridge due to its design, which minimizes errors caused by contact resistance and wire resistance. It employs a longer bridge length and a finer scale, allowing for better resolution in measurements. Additionally, the Carey Foster Bridge uses a differential method to measure unknown resistances, enhancing its sensitivity and reliability in determining precise resistance values. This makes it particularly effective for experiments requiring high accuracy.
Why couldn't a meter stick be used to measure expansion of the rod?
A meter stick is not precise enough for measuring small changes in length due to thermal expansion. For accurate measurements of expansion, a more sensitive instrument like a micrometer or vernier caliper is required.
Which meter is used to get the accurate reading between analog multimeter and digital multimeter?
A good quality analogue instrument is probably as accurate as a digital instrument, but the digital instrument is more robust, has no movement so is not affected by gravity, and is easier to read.
What is the difference between the Carey foster bridge and meter bridge?
There is no great difference between between the two in principlebut,In a Carey foster's bridge there is no end resistance whereas in the case of a metre bridge end resistance afffects our readings.Hence Carey foster bridge is more accurate than metre bridge .Carey foster bridge can also measure low resistance and high resistance but a metre bridge cannot do so.
Why use a meter bridge instead of a voltmeter?
A meter bridge is preferred over a voltmeter for measuring resistance because it provides a direct comparison between two resistances, allowing for more accurate measurements by eliminating the impact of internal resistance and calibration errors found in voltmeters. Additionally, a meter bridge can measure very low resistances more effectively and does not require a power supply, making it suitable for precise laboratory work. It also allows for the determination of unknown resistances using the principle of balance, which enhances measurement reliability.
Why the Wheatstone bridge is not used in the laboratory in place of meter bridge?
The Wheatstone bridge is not typically used in laboratories in place of the meter bridge due to its more complex setup and sensitivity to external factors, which can lead to inaccuracies. While the Wheatstone bridge is excellent for precise measurements of resistance, it requires careful adjustment and calibration. In contrast, the meter bridge is simpler, easier to use, and allows for quicker comparisons of resistances using a direct method. Additionally, the meter bridge can accommodate a wider range of resistance values without requiring recalibration.
Which instrument is more accurate at 500 HZ and 5000 HZ?
A frequency analyzer would be more accurate at analyzing frequencies like 500 Hz and 5000 Hz compared to a standard microphone or sound level meter. Frequency analyzers are designed to specifically measure and analyze different frequencies accurately.
Is the meter more accurate than the foot?
No, they are simply a different unit of measure.
Which is more accurate vernier caliper or a meter stick measurements?
A vernier caliper.
