- #1
tin llenaresas
- 18
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what happens to the potential difference of a source of emf when a voltmeter is connected across its terminals?
tanx.
tanx.
Potential difference, also known as voltage, is the difference in electric potential between two points in an electric circuit. It is measured in volts and is an indication of the amount of energy needed to move charged particles from one point to another.
Potential difference is measured using a voltmeter, which is a device that is connected in parallel to the circuit. The voltmeter measures the voltage between two points in the circuit and displays the result in volts.
Incorrect voltmeter connections can lead to inaccurate measurements and potentially damage the voltmeter or the circuit. Connecting the voltmeter in series instead of parallel can cause a significant drop in voltage, while connecting it to a higher voltage than it is designed for can damage the voltmeter.
The placement of the voltmeter can affect the measurement of potential difference. Connecting the voltmeter in parallel to the component being measured will provide an accurate reading of the potential difference across that component. Connecting it in series with the component will cause a voltage drop and give an incorrect reading.
Potential difference is essential in circuits as it is what drives the flow of electric current. It is the driving force behind the movement of charged particles and is necessary for the functioning of many electronic devices. Measuring potential difference also allows for the identification of faulty components or circuits in an electrical system.