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What is the resistance of a cicuit if the voltage is 12v and the current is 4v?
Wiki User
∙ 7y ago
According to ohm's law V = IR.
So here
I=V/R
=12/4
I=3A
Wiki User
∙ 13y ago
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What is the current when the voltage is 18 volts and the resistance is 6 ohms?
V=i*r=2*6=12v
When a 3 ohm resistor draws a current of 4 A when hooked up to a battery of unknown voltage what is the battery's voltage and what is the power dissipated by the resistor?
Voltage can be calculated using Ohm's Law:Voltage = Current (A) x Resistance (Ω)Voltage = 4A x 3Ω = 12 VoltsTherefore, the battery is a 12 Volts.The power dissipated is Voltage x CurrentPower = 4A x 12V = 48 Watts
What is the charging current and voltage of 12v 180ah battry?
That would also depend on battery chemistry.
If a 12v car battery has 0.04ohm internal resistance what is the battery terminal voltage when the battery delivers 40A?
011.1
How do you calculate welding machine demand current?
To calculate the current you need to take theWatt rating of your welder and divide this by the voltage youhave setthe machine at- this gives the amperage. So for a 1440 watt welder running at 12v the current would be: 1440 watt/ 12v = 120 Amps
What is the current when the voltage is 18 volts and the resistance is 6 ohms?
V=i*r=2*6=12v
When a 12 V battery is connected across an unknown resister there is a current of 2.5 mA in the circuit find the value of the resistance of the resistor?
Resistance = voltage / current = 12V / 2.5mA = 12V / (2.5 x 10-3 A) = 4.8 x 103 ohm
If the voltage is increased and current remains the same, what happens to the resistance?
According to ohms law (R=V/I) if voltage increases the resistance also increases .For example: If voltage (V) becomes 2 times the resistance (R) also increases becomes 2 times keeping the current (I) same
How do you compute wattage?
Wattage or power rating of a product can be calculated by multiplying voltage rating and current rating. (Power = Voltage x Current). e.g. if device is working at 12V and 2A is the current rating. It is 24Watt. Since Voltage = Current x Resistance , for a resistive load power can also be calculated by Power = Current x Current x Resistance = I^2 x R = I square R
Determine the power dissipated if the voltage supplied to a circuit is 12V and the current measured is 3A?
The power dissipated by a circuit with a voltage of 12V and a current of 3A is 36W. Watts is Volts times Amps.
What is output voltage of 12v 5watt solar panel?
The output voltage of 12V 5W solar panel is 12V. The current is 0,41667A. These values are normaly calculated with 1000W/m2 of solar radiation.
The wiring in the wall of your house to and from an outlet has a total resistance of typically 0.12 ohms suppose a device plugged into a 120 V outlet draws 10 A of current What is the voltage drop?
Assume the supply as DC (Only resistance given) Voltage drop = 10X10X0.12 = 12V (approx)
Can you use output 12v 5A for 12v 3.0A?
Yes, you need to match the Voltage, the current (A) need to be the same or higher.
Why would there be 12v between the negative cable and the post after all fuses are pulled?
Its normal. There's two components to electrical power: voltage and current. A voltage is merely a "potential" to do electrical work. The amount of resistance in a circuit with respect to the amount of potential is what determines how much current flows. Its simple ohms law: Voltage = Current * Resistance, Power = Voltage * Current. Pulling the fuses out of the fuse box leaves an open circuit, which is an infinite amount of resistance. So by pulling your fuses, you prevent current from flowing, but you haven't taken away your battery's potential to do work (its voltage.) The voltage is always there as long as the battery is charged, but no current will flow or power be realized unless you reduce that resistance to something less than infinite by connecting a circuit to it (or in this case, completing the circuit again by replacing the fuses.)
What is the unit of the resistors?
Resistor values are given in ohms. A value may be selected to deliver a specific current at a given voltage. This is given in what is known as Ohm's Law where: Voltage (V) = Current (A) X Resistance (Ohm) A 12ohm resistor placed across a 12V battery would pass 1Amp of current and put out 12W of heat.
When a 3 ohm resistor draws a current of 4 A when hooked up to a battery of unknown voltage what is the battery's voltage and what is the power dissipated by the resistor?
Voltage can be calculated using Ohm's Law:Voltage = Current (A) x Resistance (Ω)Voltage = 4A x 3Ω = 12 VoltsTherefore, the battery is a 12 Volts.The power dissipated is Voltage x CurrentPower = 4A x 12V = 48 Watts
What is the unit of measures for resistors?
Resistor values are given in ohms. A value may be selected to deliver a specific current at a given voltage. This is given in what is known as Ohm's Law where: Voltage (V) = Current (A) X Resistance (Ohm) A 12ohm resistor placed across a 12V battery would pass 1Amp of current and put out 12W of heat.
