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It depends upon what the circuit is for and what components it contains. For example, increasing the voltage on a high-voltage transmission line will have very little effect, but a small increase in a micro-circuit could cause damage.


In general, an increase in voltage will result in an increase in current.

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Q: What happens when the voltage across a circuit increases?
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What happens with electric current when applying the same voltage the resistance of the circuit is reduced?

As the resistance is reduced across the same voltage, the current increases.

What happens to the current in a circuit as a capacitor charges?

What happens to the current in a circuit as a capacitor charges depends on the circuit. As a capacitor charges, the voltage drop across it increases. In a typical circuit with a constant voltage source and a resistor charging the capacitor, then the current in the circuit will decrease logarithmically over time as the capacitor charges, with the end result that the current is zero, and the voltage across the capacitor is the same as the voltage source.

What happens to the voltage across the voltage source as more light bulbs are added in a series circuit?


Does voltage flow across a circuit or is it impressed across a circuit?

Voltage is impressed across a circuit. Current flows through a circuit.

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More current is drawn from the supply, the voltage across the circuit will remain the same.

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The voltage measured across an open in a series circuit is the equivalent of the sourse voltage.

In a shorted circuit what happens to the temperature of the wires?

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When voltage increases what happens to current?

Ohm's law states that "The current is directly proportional to the applied EMF (voltage) and inversely proportional to the resistance in the circuit."AnswerIf the voltage across a circuit increases, then the current will increase too. If the ratio of voltage to current is constant for variations in voltage, then the circuit is described as being 'linear' and is obeying Ohm's Law; if the ratio of voltage to current changes (as it would, for example, with tungsten) for variations in voltage, then the circuit is described as being 'non-linear', and is not obeying Ohm's Law. This is because Ohm's Law is not universal, and only applies to certain materials; in fact, most materials and electronic devices do not obey Ohm's Law.

What happens to a circuit if the resistances is increased?

The voltage drop across each resistance will go up, and the current through the circuit will go down.

If the resistance in the circuit is increased what will happen to the current and voltage?

* resistance increases voltage. Adding more resistance to a circuit will alter the circuit pathway(s) and that change will force a change in voltage, current or both. Adding resistance will affect circuit voltage and current differently depending on whether that resistance is added in series or parallel. (In the question asked, it was not specified.) For a series circuit with one or more resistors, adding resistance in series will reduce total current and will reduce the voltage drop across each existing resistor. (Less current through a resistor means less voltage drop across it.) Total voltage in the circuit will remain the same. (The rule being that the total applied voltage is said to be dropped or felt across the circuit as a whole.) And the sum of the voltage drops in a series circuit is equal to the applied voltage, of course. If resistance is added in parallel to a circuit with one existing circuit resistor, total current in the circuit will increase, and the voltage across the added resistor will be the same as it for the one existing resistor and will be equal to the applied voltage. (The rule being that if only one resistor is in a circuit, hooking another resistor in parallel will have no effect on the voltage drop across or current flow through that single original resistor.) Hooking another resistor across one resistor in a series circuit that has two or more existing resistors will result in an increase in total current in the circuit, an increase in the voltage drop across the other resistors in the circuit, and a decrease in the voltage drop across the resistor across which the newly added resistor has been connected. The newly added resistor will, of course, have the same voltage drop as the resistor across which it is connected.

What happens when one bulb is added to a series circuit?

The resistance is increased, the voltage across each bulb is decreased and the current through the circuit is reduced.