Question

Does current increase with voltage?

Answer 1

Hint: To answer the above question we need to look into the most fundamental laws of electricity which is known as Ohm’s law. Ohm’s law gives us the relationship between the three fundamental electrical quantities. They are current, voltage, and resistance. We can state ohm’s law and then we can conclude the relation between current and voltage.

Complete step by step solution:
We can state ohm’s law as “the electric current that flows through the circuit (I) is always directly proportional to the voltage (V) provided and inversely proportional to the resistance (R) present in the circuit. Mathematically,
I \[ = \] \[\dfrac{V}{R}\]
Therefore from the above equation, we can say that if there is an increase in the voltage there will be an increase in the current, and if there is a decrease in the voltage there will be a decrease in the voltage.
Also, we can justify this for another reason. We know that current is a flow of charge. If the voltage is large then practically there are more electrons to flow therefore the current will be also quite large. Voltage is also said to be the potential energy of an electrical supply stored in the form of an electrical charge. We can also see the voltage as a force that pushes the electrons through a conductor. So therefore the greater the voltage the greater the ability it has to push the electrons which results in a greater current.
Therefore the answer to the given question is yes the current increases the voltage provided the resistance is constant in the circuit.

Note: However, many kinds of devices do not follow the ohm's strictly. Sometimes the resistance will not remain constant due to many other facts. Depending upon the temperatures some devices will have variable resistance. Also, since the flow of current increases the temperature of the components there is a risk of thermal runaway. Because we know that an increase in temperature will make the resistance decrease. So let’s not assume that all devices blindly follow the ohm's law.