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You have it backwards, the resistance controls the current not the current controls the resistance. I = E/R . Your question should read, "If the voltage is constant and the resistance in the circuit is increased what happens to the current?" Say the voltage is 120 volts and the resistance is 30 ohms, I = 120/30 = 4 amps. Now we double the resistance to 60 ohms, then I = 120/60 = 2 amps. So now you can see if you increase the resistance the current drops.

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15y ago
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11y ago

If voltage is a constant and resistance increases, the current will decrease proportionally. To calculate this you can divide voltage by resistance to get current.

Now comes the confusing part, at least for some. The letter "V" stands for volts and is expressed in volts. The letter "R" stands for resistance and is expressed in ohms. The letter "I" stands for current and is expressed in amps. Don't ask why, it just does.

V / R = I

Now for a simple example. If you have a 9 volt battery (V) and connect a 10 ohm resistor (R) from the plus to the minus terminals, you will have 9 divided by 10 or 0.9 amps (I).

Increase your resistor to 20 ohms and you will get 0.45 amps.

Cool eh?

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The symbol for current, 'I', comes from the French word for 'intensity'. In an equation, 'V' represents 'voltage', not volts.

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9y ago

When the current remains constant, an increase in voltage will increase the resistance of the circuit.

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Completely impractical question. None of the factors that affect resistance are mentioned so what you describe cannot happen!

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14y ago

Since Voltage equals Current times Resistance then the voltage increases with an increase in resistance if the current remains constant.

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12y ago

If the resistance increases, the current diminishes. The voltage may drop a little and the multimeter can't read it or can't accuse so little voltage dropping.

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6y ago

If the resistance remains constant then current does not change unless voltage changes

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13y ago

Current will increase.

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Q: If resistance is constant and voltage increases what happens to current?
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Based on the simplest Electrical Equation V = I * R,(reads: voltage equals current multiplied by resistance)then, rearranged I = V / R .As resistance decreases, current flow proportionately increases


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