Which instrument is used to measure electric current in a circuit?
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An ammeter is connected in series with the circuit.
An ideal ammeter has:
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An ideal ammeter should not significantly oppose current.
A voltmeter is connected in a circuit:
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A voltmeter measures potential difference between two points.
A galvanometer can be converted into a voltmeter by connecting a:
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A high series resistance limits the current through the galvanometer.
A galvanometer is mainly used to detect:
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A galvanometer is sensitive to small currents.
An ideal voltmeter has:
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An ideal voltmeter draws no current from the circuit.
The instrument used to measure resistance directly is called:
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An ohmmeter is designed to measure electrical resistance.
The range of an instrument refers to:
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Range specifies the limits within which the instrument can measure.
A potentiometer is primarily used to compare:
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A potentiometer measures or compares emf/potential difference without drawing current from the source at balance.
The closeness of repeated measurements to one another is called:
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Precision describes consistency among repeated measurements.
The ability of an instrument to respond to small changes in the quantity being measured is called:
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A sensitive instrument detects small changes in the measured quantity.
A Wheatstone bridge is commonly used to determine:
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A balanced Wheatstone bridge can be used to find an unknown resistance.
A zero error occurs when an instrument:
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Check the instrument reading before taking the measurement.
A meter rule is commonly used to measure:
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A meter rule is a length-measuring instrument.
The process of comparing an instrument with a standard measurement is called:
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Calibration establishes the relationship between an instrument reading and a standard.
A multimeter can commonly measure:
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A multimeter combines several electrical measuring functions.
The closeness of a measured value to the true value is called:
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Accuracy indicates closeness to the true value.
A galvanometer can be converted into an ammeter by connecting a:
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The shunt provides a low-resistance path for most of the current.
The difference between the true value and measured value is called:
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Measurement error represents the difference between measured and true values.
The smallest value that can be measured by an instrument is related to its:
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Least count is the smallest measurement that can be resolved by the instrument.
