Does resistance depend on current or voltage?

Current tends to move through the conductors with some degree of friction, or opposition to motion. This opposition to motion is more properly called resistance. The amount of current in a circuit depends on the amount of voltage and the amount of resistance in the circuit to oppose current flow.

Is voltage or current independent?

Current can not exists without a voltage which is basically potential difference between two points. Plus voltage is driving factor for current. None of the above two statements hold true when reversed. So, Voltage is Independent and Current is dependent.

Does voltage increase with resistance?

The voltage only increases when you increase a resistance IF the current stays constant. In a simple circuit the current almost certainly would NOT stay the same when you increase the resistance. Amps are a measure of how many electrons flow past a point in the circuit per second.

Does resistance increase with voltage?

If the current is held constant, an increase in voltage will result in an increase in resistance. Alternately, an increase in current while holding the voltage constant will result in a decrease in resistance.

Is resistance an independent variable?

The main variables in a science experiment are the independent variable, the dependent variable and the control variables. In this experiment the: Independent Variable is the length of wire. Dependent Variable is the resistance of the wire.

What is the resistance of a current source?

infinite
The internal resistance of an ideal current source is infinite. An independent current source with zero current is identical to an ideal open circuit.

Does resistance increase with current?

Resistance controls the flow of current. Ohms law states that the current flowing in a circuit is proportional to the voltage applied to the circuit, and inversely proportional to the resistance of the circuit. In other words, for a given voltage, the current in the circuit will decrease as the resistance increases.

What happens to the current and the resistance when the voltage is increased in a circuit?

Ohm’s law states that the electrical current (I) flowing in an circuit is proportional to the voltage (V) and inversely proportional to the resistance (R). Therefore, if the voltage is increased, the current will increase provided the resistance of the circuit does not change.

Do voltage sources have resistance?

The internal resistance of an ideal voltage source is zero; it is able to supply or absorb any amount of current. The current through an ideal voltage source is completely determined by the external circuit….Ideal voltage sources.

What is the relationship between voltage and resistance in a circuit?

Assuming “perfect” voltage (independent of current) and resistance (independent of current), then there is no relationship at all — changing the voltage will not change the resistance, and changing the resistance will not change the voltage. If you are asking how voltage and resistance determine current, other answers have addressed that.

How do you calculate current with a higher resistance?

With voltage constant (voltage source), an increase in resistance reduces current. Use the formula I = V/R. Let’s say you are using a 12V source. With a resistance of 100 ohms, the current will be 0.12 amps.

Does voltage change across a resistor?

But it’s only affected across the resistor. If there’s a series of resistors and the resistance of one increases, voltage measured across that particular resistor will be higher. However, overall circuit voltage remains constant. With a current source circuit, current is held constant regardless of voltage and resistance.

What is the meaning of independent voltage and independent current source?

They are two-terminal devices and has a constant value, i.e. the voltage across the two terminals remains constant irrespective of all circuit conditions. The strength of voltage or current is not changed by any variation in the connected network the source is said to be either independent voltage or independent current source.