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What is the effect if the polarity of voltage to be measured is not properly observed?
Wiki User
∙ 12y ago
An analogue meter will deflect the needle the wrong way.
A digital meter will show a negative value.
Wiki User
∙ 12y ago
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Why during measurement the measured voltage and currents have negative sign?
Because of the polarity of the circuit. The signs of measured current and voltage depends on the direction of the current and voltage.
How a bucking voltage acts?
bucking voltage is a voltage which is of opposite polarity to the voltage it acts .
Voltage is measured with?
Voltage is measured with a voltmeter.
Did the armature voltage reverse its polarity?
yes
What test would identify a short circuit in a lighting circuit?
earth continuity insulation resistance polarity
How do you tell polarity?
what do ya mean by "Polarity" for the following parameters? Charge: Voltage: Current: Meter Probes:
What is mean polar?
What is meant by polarity? Answer An electric charge has a polarity of either positive or negative. Also a voltage has a polarity, in that it could be positive or negative, with respect to some other voltage, such as the one at the other end of a battery or electric circuit.
How does the voltage measured across a dry cell ompare with the voltage drop measured across three bulbs in series?
How does the voltage measured across a dry cell ompare with the voltage drop measured across three bulbs in series?
What law is used to find the polarity of resistor when two voltage source are connected?
Hi! Well, it depends what voltage is "pushing" harder on the resistor. If you are ONLY dealing with 2 voltage sources and a single resistor, then the voltage source with the higher potential (or voltage) will dictate what polarity the resistor is. Cheers!
How voltage measured?
It is measured using a Voltmeter
What is the unit voltage is measured in?
ummm... ...voltage?
What do you mean by Polarity of a transformer?
Transformer polarity is the direction the secondary goes relative to the primary, or relative to another secondary. Usually, polarity does not matter, for example in the case where the secondary is connected to a rectifier / filter / regulator. Sometimes, it does matter, particularly if there are two secondaries used to provide DC isolation between a preamp and a final amplifier in push-pull configuration. It can also matter if the overall circuit is involved in a feedback loop and phase inversion is a factor.AnswerWhen applied to transformers, the term 'polarity' describes the direction in which the secondary voltage is acting relative to the direction of the primary voltage. Polarity is determined by the directions in which the primary and secondary windings are wound relative to each other.Polarity is described as being either 'additive' or 'subtractive', and can be determined by of connecting one pair of primary and secondary terminals together. If the voltage measured between the other adjacent primary and secondary terminals is greater than the primary voltage, then the transformer has 'additive' polarity; if the voltage is less than the primary voltage, then the transformer has 'subtractive' polarity.Knowing the polarity of individual transformers is important when two single-phase transformers are connected in parallel with each other because, if polarity is ignored, then an incorrect connection might result, causing a large circulating current through the two secondary windings.
