Name the instrument that measure potential difference between two points in a circuit .draw the circuit symbols for variable resistors lucky which is closed.
Answers
Answer:
voltmeter is the instrument that measures potential difference
Answer:
Explanation:
*A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit.
*Analog voltmeters move a pointer across a scale in proportion to the voltage of the circuit; digital voltmeters give a numerical display of voltage by use of an analog to digital converter.
*A voltmeter in a circuit diagram is represented by the letter V in a circle.
*Voltmeters are made in a wide range of styles. Instruments permanently mounted in a panel are used to monitor generators or other fixed apparatus.
*Portable instruments, usually equipped to also measure current and resistance in the form of a multimeter, are standard test instruments used in electrical and electronics work.
*Any measurement that can be converted to a voltage can be displayed on a meter that is suitably calibrated; for example, pressure, temperature, flow or level in a chemical process plant.
*General purpose analog voltmeters may have an accuracy of a few percent of full scale, and are used with voltages from a fraction of a volt to several thousand volts. *Digital meters can be made with high accuracy, typically better than 1%.
*Specially calibrated test instruments have higher accuracies, with laboratory instruments capable of measuring to accuracies of a few parts per million.
*Meters using amplifiers can measure tiny voltages of microvolts or less.