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No, it doesn't! Ohm's Law states that 'the current passing through a conductor is proportional to the voltage applied across the ends of that conductor, providing external conditions such as temperature remain constant'. Put another way, Ohm's Law can be expressed as 'the ratio of voltage to current is constant for variations in voltage'.
In fact, very few conductors obey Ohm's Law, so that it is by no means a universal law. Those that do are called 'linear' or 'ohmic' materials, whereas those that don't are called 'non-linear' or 'non-ohmic'. Non-linear conductors include tungsten, and non-linear devices include semiconducting materials including diodes.
The ratio of voltage to current is called resistance, so you can always determine the resistance of a material, at any given voltage, by dividing that voltage by the current -whether that material obeys Ohm's Law or not.
What else can I help you with?
What resistance in ohms will allow 20 amperes of current to flow in an appliance if the voltage is 220 volts?
The formula you are looking for is R = E/I
How does electric resistance relate to energy transformation?
Power in a circuit is inversely proportional to the resistance, all other things being equal. Voltage equals amperes time resistances, so amperes equals voltage divided by resistance. Watts equals voltage times amperes, so watts equals voltage squared divided by resistance.
What votage will cause an 8 amp current to flow through a 24 ohm resister?
Ohm's law: Voltage equals current times resistance. 8 amperes times 24 ohms equals 192 volts.
What crrent does a 203-ohm resistor draw from a 115 V power supply?
Ohm's law: current equals voltage divided by resistance, so a 203 ohm resistor would draw 0.57 amperes from a 115 volt power supply.
How much is 10.2 kilo ohms?
10.2 kilo ohms is the resistance necessary for 1 volt to induce a current of 98.04 micro amperes. Ohm's law: voltage equals current times resistance.
What resistance in ohms will allow 20 amperes of current to flow in an appliance if the voltage is 220 volts?
The formula you are looking for is R = E/I
What is the current through a wire that has a resistance of 30 ohms if the voltage is 90 volts?
The current through the wire can be calculated using Ohm's Law, which states that current (I) equals voltage (V) divided by resistance (R). In this case, the current would be 90 volts divided by 30 ohms, which equals 3 amperes.
Calculate the current if voltage equals 19.8 V and resistance equals 2.2 ohms?
9 amperes.
How is current related to resistance in a circuit?
Ohm's law: voltage is current times resistance. Restating this; current is voltage divided by resistance, so increasing resistance would decrease current.
How does electric resistance relate to energy transformation?
Power in a circuit is inversely proportional to the resistance, all other things being equal. Voltage equals amperes time resistances, so amperes equals voltage divided by resistance. Watts equals voltage times amperes, so watts equals voltage squared divided by resistance.
2 volts divided by 100 kOhms equals how many milliamps?
2 volts across 100 kOhms produces 0.02 milliamps (or 20 microamps) of current. Ohm's law: Voltage = Amperes * Ohms, so Amperes = Voltage / Ohms.
The unit for current is?
Current is measured in amperes, or amps for short (A). One ampere equals one coulomb of charge per second.
An electric DC circuit is attached to a 12-volt battery and has a 3-ohm resistor in it find the current flowing through the circuit?
Use the equation, V= IR from Ohm's Law V is the voltage, I is the current, and R is the resistance in ohms So then, solve the equation for I (the current) and you get I=V/R. Then just plug in the values... I= 12/3, which equals 4 A. (For current, it is measured in amperes, or just "A" as the unit.)
What votage will cause an 8 amp current to flow through a 24 ohm resister?
Ohm's law: Voltage equals current times resistance. 8 amperes times 24 ohms equals 192 volts.
What crrent does a 203-ohm resistor draw from a 115 V power supply?
Ohm's law: current equals voltage divided by resistance, so a 203 ohm resistor would draw 0.57 amperes from a 115 volt power supply.
How much current does 60 watts Operated at 120 volts have?
To calculate the current, you can use the formula: Current (I) = Power (P) / Voltage (V). In this case, 60 watts divided by 120 volts equals 0.5 amperes. Therefore, a device operating at 60 watts on a 120-volt circuit would draw 0.5 amps of current.
What is the current when a 60 watt lamp is connected to 120 volta?
To find the current, use Ohm's Law, which states that current (I) equals power (P) divided by voltage (V). For a 60-watt lamp connected to 120 volts, the current is calculated as follows: I = P/V = 60 watts / 120 volts = 0.5 amperes. Therefore, the current flowing through the lamp is 0.5 A.
