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the currents path blocks & normal voltage will flow
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∙ 12y ago
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What does a resistor do in an electric circuit?
Limits current flow and drops voltage.
What does a resistor do in a electrical circuit?
Limits current flow and drops voltage.
Does a resister use current?
It may be better to say that a resistor allows current flow through itself rather than to say that a resistor is a device that will "use" current. It does "resist" current flow, and thus limits it to some degree depending on its resistance. (More resistance means more limiting of current flow.) The resistor "drops voltage" as well limits current. A resistor "feels voltage" from some source, and the voltage it "feels" is said to be the "voltage drop" of the resistor. The voltage drop is the voltage that could be measured across that resistor with a meter.
What is the exciter voltage needs to test the generator?
Because the voltage is fixed (within allowable limits) whereas the current varies according to load.
Why voltage is low while using heater as home appliance?
The current is proportionately high as heater requires current to heat the filament.The voltage is deliberately low to sustain the safe power consumption limits.
What limits the current that flows through a circuit for a particular appllied DC voltage?
The voltage applied and the resistance across it.
Does voltage regulator increase or decrease the current input?
A DC voltage regulator gives a constant output voltage provided the input voltage is at least 1.5 v higher, up to a given limit. The input current is slightly more than the load current, because a small amoutn of current is needed for the voltage regulator circuit. Check the datasheet of the component which you are using to find the limits. 7805 IC can give upto 1A of current if there is adequete heatsinking.
What is Difference Between Current Source and Voltage Source?
A current source varies the output voltage to maintain the desired current. A voltage source has a constant output regardless of the current draw (up to the capacity of the supply, of course).
What is meant by rated voltage rated current and rated power of a transformer?
The ratings state the limits on voltage and current for operating the transformer at full load. The rated voltage times the rated current gives the rated VA of the transformer. Transormers are not usually rated directly for power because this depends on the power factor of the load applied.
What is DC reactor in inverter?
This is used to improve the input power factor of the inverter power supply and reduce harmonics. The ''DC reactor'' is more effective than the input reactor in improving the power factorDC reactors (link chokes) are connected after the input diodes in the power circuit. One of the disadvantage of the DC reactors is they are located after the input diodes, and do not protect the diodes from possible voltage transients. One coil is needed in a DC circuit versus 3 coils in the AC circuit. Additionally DC reactors smoothing the current flow limits the high peak current pulses from abusing the capacitor bank inside the converter.
What is the need of resistor in the experiment of pN junction diode?
The resistor limits current so you can measure voltage across the diode. When you forward bias and saturate a junction, the voltage across it will be constant (0.7 in silicon, for example).
What is the effect of no emitter resistance on common emitter amplifier?
Limit current through emitter, Often the resistance is the load itself. So the restatnce limits current on what otherwise would act as a voltage follower.
