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What happens in a series circuit if one of the resistors is replaced with a resistor having a lower resistance value?
In a series circuit, if one resistor is replaced with a resistor of lower resistance, the total resistance in the circuit decreases. This leads to an increase in the overall current flowing through the circuit.
What happens when you have low resistance?
Having low resistance means that there is an easier flow of electric current through a circuit. This can lead to higher current levels which could potentially damage the components in the circuit or cause overheating. It can also result in a decrease in voltage across the circuit.
Why should you never measure resistance in a circuit carrying a current?
Ideally true, but seldom so. The vast majority of resistance meters use current to measure resistance and just use V=IR to give R - the resistor is in a circuit carrying current. The only method that does not have a current through the resistance, it actually relies on the fact, is a Wheatstone bridge. The most important reason for not having a current is that you will be using a current in most cases, to meaure the resistance. Current from another source will screw the reading. Also, with a current flowing, you are not measuring resistance - you are measuring impedance - a combination of inductance and resistance.
How do you know an electrical circuit has a short in it?
A short circuit is determined by a low resistance between two conductors or between a conductor and the ground. <<>> The circuit's over current protection usually trips resulting in the circuit having no power.
What will happen if a voltmeter has a low shunt resistance instead of having high shunt resistance?
The purpose of a voltmeter is to indicate the potential difference between two points in a circuit.When a voltmeter is connected across a circuit, it shunts the circuit. If the voltmeter has a low resistance,it will draw a substantial amount of current. This action lowers the effective resistance of the circuit andchanges the voltage reading.
What blocks current flow?
Resistors "resist" current flow. The ultimate "blocking" resistor is an open circuit, having a resistance of infinity (for all practical purposes) ohms.Capacitors also resist a change in voltage drop. For the case of a DC circuit, a capacitor, after reaching equilibrium, will present a DC resistance of infinity. For the case of the AC circuit, a capacitor will allow the AC signal to pass, while blocking any DC bias that might be present.So, resistors and, in the DC case, capacitors, block current flow.
What are the names of the dutors in a circuit?
In a circuit, the primary types of sources (or "dutors") are voltage sources and current sources. Voltage sources provide a fixed voltage regardless of the current flowing through them, while current sources deliver a constant current regardless of the voltage across them. Both types can be ideal or real, with ideal sources having no internal resistance and real sources exhibiting some resistance.
Can interesting a resistor in a circuit produce an affect similar to a short circuit?
A true "short circuit" indicates that a device or conductor having essentially no measurable (by conventional ohm meters) resistance is connected across the circuit. Thus the current flow through the "short circuit" will be limited only by the conductors supplying the current to the "short circuit", and the source of the current.But as the resistance is increased, less current will flow. If the resistance is sufficiently high so as to NOT pass current in excess of that for which the supplying conductors are rated, AND the current that can be safely supplied by the power source, it then acts as an "intended load", and will not appear as a "short circuit".For example, an incandescent, 60 watt, 120 VAC light bulb, will have an operating resistance of approximately 240 ohms. Since power (in watts) in a resistive "load" is equal to the square of the RMS voltage applied, divided by the resistance (in ohms) of the "load'. The corresponding current would be only 1/2 ampere. (Current equals the applied voltage divided by the resistance).In typical home wiring, in which lighting circuits are usually protected by fuses or circuit breakers in the mains distribution box, the circuits are rate at 15 amperes. Thus the "resistance" of a 60 watt incandescent light bulb will have very little "load" on the circuit, and certainly can not be considered a "short circuit".
Which one of the following statements is true concerning an ac circuit that contains both resistance an inductance?
When an AC circuit contains both resistance and inductance the current and voltage will be in phase. This means having waveforms that are of the same frequency and that pass through corresponding value.
If the voltage is 12 volts and the resistance is 3 ohms what are the amps in this circuit?
Oh, dude, it's like basic math here. So, you just divide the voltage by the resistance to get the current. In this case, 12 volts divided by 3 ohms equals 4 amps. So, the current in this circuit would be 4 amps. Easy peasy lemon squeezy!
What is the current running through resistor 1?
I'm having some trouble focusing in on the schematic of the circuit.
What will happen to resistance If amperage goes down and voltage remains the same?
The correct term is 'current', not 'amperage'. The answer is that nothing will happen to the resistance. Having said that, changing the resistance will cause current to change for a fixed value of voltage.Resistance is determined by the length, cross-sectional area, and resistivity of a material. Resistivity is affected by temperature, so resistance is also therefore indirectly affected by temperature. Only by changing one of these variables will the resistance change.Since the ratio of voltage to current will tell us what the resistance of a circuit happens to be (it's not affected by that ratio) for a particular ratio, the ratio will increase (as per your question) if the resistance increases. But it's not the ratio that's affecting resistance, its the resistance affecting the ratio!
