0
What happens in a circuit if the voltage is doubled and the resistance is held constant?
Wiki User
∙ 12y ago
The answer depends entirely upon the scenario. Are you dealing with AC or DC? Does your circuit contain passive components or both passive and active components?
For example, if you a simply dealing with a resistive DC circuit, you can derive your answer from Ohm's law, V = IR. Rearranging for current, I = V/R, so if you double the voltage, the current is subsequently doubled.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoVoltage = Current * Resistance. The current will double.
Power = Voltage * Current. This means the power dissipated by the circuit will quadruple. That means a lot more heat will be generated as well.
Wiki User
∙ 12y agoPer Ohm's Law Voltage = Current x Resistance. Therefor current will double.
Ohm's law states that E=RI, where E is voltage, R is resistance and I is current.
From the above equation, doubling the voltage will also double the current with R remaining constant. For example, if R is 1 Ohm and I = 1 Ampere, then E = 1 Volt. If you multiply E by 2 while R remains as 1 Ohm, then current becomes 2 Amperes. Remember to keep the units consistent.
Wiki User
∙ 12y agoIf you are asking about supply voltage then the answer will be :
voltage will not be changed as it is not depend on the resistance of the circuit.
If you r asking about the voltage across the resistor then the answer will be :
Voltage across the resistor(Vr) will be doubled as the current(I) is constant ,
so , Vr(new) = I* 2*R [R = value of the resistance ]
or , Vr(new) = 2*{I*R}= 2* Vr(old).
Wiki User
∙ 11y agolower resistance
AnswerIt depends on the current levels involved. If doubling the current causes a substantial rise in temperature, then it is likely the conductor's resistance will increase (assuming it is a metal). This is because resistivity and, therefore, resistance of a metal increases with temperature.
If doubling the current has no appreciable affect on temperature, then it depends. If the conductor is 'linear' or 'ohmic', then it will obey Ohm's Law, and there will be no change in resistance. If the conductor is 'non-linear' or 'non-ohmic', then it will not obey Ohm's Law, and the resistance will probably increase somewhat.
Wiki User
∙ 12y agoIf all other parameters are held constant and the load doesn't fail, the current will triple.
Wiki User
∙ 11y agoThe current will be reduced by half.
Add your answer:
Earn +20 pts
When a dead short occur what happens to circuit resistance?
The circuit resistance is likely to gradually drop and in such case it will cause the circuit to burn down.
What happens to the current of the wire when the length increases?
resistance is directly proportional to wire length and inversely proportional to wire cross-sectional area. In other words, If the wire length is doubled, the resistance is doubled too. If the wire diameter is doubled, the resistance will reduce to 1/4 of the original resistance.
What happens if you shorten the resistance wire in a circuit?
It shortens
What happens to the voltage if the current increases?
Yes, if the resistance remains constant. Power is voltage times current, and current is voltage divided by resistance, so power is voltage squared divided by resistance. In essence, the power increases as the square of the voltage.
What happens to the current in a circuit if one resistance is doubled or halved?
P1 = V I1, Therefore, if P2=0.5*P1, thenI2=0.5*P1/V, or 0.5*I1and if P3=2*P1, thenI3=2*P1/V, or 2*I1In other words, current is proportional to power and inversely proportional to voltage.
If the resistance in a circuit is doubled while the voltage remains the constant the current is?
It is halved. coz voltage=current * resistance
What happens to a parallel circuit resistance if the voltage applied is doubled?
That has no effect on the resistance. The current doubles also.
What happens to the current when the voltage is doubled and the resistance is constant?
I = E/R If resistance is constant, then current is directly proportional to voltage. Double the voltage ===> the current will also double.
What happens when you halve the resistance in a circuit when voltage remain constant?
Since resistance is the ratio of voltage to current, we can say that halving the resistance will result in twice the current.
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 the current flowing in a circuit if its resistance is doubled?
Using Ohms Law: V = I x R, where V (Voltage), I (Current), and R (Resistance). re-arranging: V/R = I Therefore if you double both the Voltage and the Resistance, the current remains unchanged.Current = Voltage / Resistance. If both resistance and voltage double the current remains the same.
What happens to the resistance when the frequency is doubled?
Impedance of a coil or a capacitor does depend on the excitation frequency,but resistance has no relationship to frequency.
When resistance is in a circuit what happens to the current?
When you add resistance to a circuit, current goes down. Ohm's Law: current = voltage divided by resistance.
When a dead short occur what happens to circuit resistance?
The circuit resistance is likely to gradually drop and in such case it will cause the circuit to burn down.
What happens to the current of the wire when the length increases?
resistance is directly proportional to wire length and inversely proportional to wire cross-sectional area. In other words, If the wire length is doubled, the resistance is doubled too. If the wire diameter is doubled, the resistance will reduce to 1/4 of the original resistance.
What happens if you shorten the resistance wire in a circuit?
It shortens
What happens to amps when you increase the resistance of a circuit?
If you don't change the voltage between the ends of the circuit,then higher resistance in the circuit means lower current (amps).
