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If the resistance of the variable resistor increases, the current flowing through the circuit decreases. As a result, the bulb will emit less light or may not light up at all, depending on the magnitude of the resistance increase.

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1y ago

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it explodes and burns everyone in the room.


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What happens in a series circuit if the resistance is halved?

If you add a second resistor, the resistance of series circuit will increase.


What happens to voltage when resistance is increased?

Ohms law is V=I X R. If resistance (R) is reduced and current (I) is constant, then voltage (V) must decrease. You can see from the equation that they are proportional to one another. If, however, R is reduced and V is held constant, then I must increase (I and R are inversely proportional). The only way V can increase is if either or both I and R increase.


What happens to the ammeter reading if resistor is removed?

If the resistor is removed from the circuit, the total resistance in the circuit decreases. This causes the total current in the circuit to increase, which would result in an increase in the ammeter reading.


What happens to the contribution ratio when the components change?

The contribution ratio is the relationship between total sales revenue and total variable costs. If the components change, such as an increase in sales revenue or a decrease in variable costs, the contribution ratio will increase. Conversely, if sales revenue decreases or variable costs increase, the contribution ratio will decrease.


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.


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How does a volume knob work or what happens to make the sound increase when the knob is turned?

They key to volume control is a variable resistor. A variable resistor uses a resistance track with connections at both ends. There is wiper that moves along the track as the volume knob is turned. The tracks are usually rotary for volume knobs, or tracks for volume sliders. The variable resistor may be used as a rheostat, which means that only two terminals are used (the wiper and one end of the track). By turning the knob, the wiper sweeps across the track, which will effectively vary the resistance from 0 to maximum. A rheostat is usually used to vary current so they would be useful for varying the brightness of a lamp. A variable resistor can also be used as a potentiometer, which uses all three connections (both ends of track and wiper). If you connect the track terminals across a power supply, then the wiper terminal is used to provide a voltage, which can be varied from 0 to the maximum (the supply voltage). Potentiometers are usually used for amplifiers. Hope this helps


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What happens to the resistance of a common ohmic resistor when it is heated?

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When the current traveling through a resistor is increased what happens to the voltage that travels through the same resistor?

Your question reveals fundamental misunderstandings about the nature of electricity.'Voltage' is simply another word for 'potential difference', and a potential difference appears across opposite ends of the resistor; it doesn't 'travel through' that resistor! Current, on the other hand, DOES 'travel through' the resistor and is caused by the potential difference across the resistor.Resistance is the ratio of potential difference to current. So if the resistance remians unchanged when the current through it doubles, then it has happened because the potential difference has doubled.