Why does current depend on potential difference?

Why does current depend on potential difference?

The potential difference across the circuit depends directly on current flows through the wire, and resistance across the wire and resistance across the circuit depends directly on potential difference and inversely proportional to the current flows through the wire.

On what factors does current depend?

Answer. (I) It is directly proportional to the potential difference. (II) It is inversely proportional to the resistance.

Is voltage open circuit or short circuit?

In particular: The open circuit voltage is the voltage difference measured between two terminals when no current is drawn or supplied. The short circuit current is the current that flows when the terminals are forced to have zero voltage difference.

What if current source is shorted?

Its terminals are the same node, so it does not interact with the rest of the circuit, just circulates current back to itself. A shorted ideal voltage source is a contradiction, and a shorted non-ideal voltage source will either destroy itself, shut down, or reach a current limit which reduces its output voltage.

Do current sources exist?

6 Answers. An ideal current source is a concept, and does not exist, cannot exist. So we can approximate a current source by a transistor, with the base held at some potential which keeps a voltage across, and therefore a current through, an emitter resistor, which current appears at the collector.

What is an example of current source?

The output part of the simple current mirror is an example of such a current source widely used in integrated circuits. The common base, common gate and common grid configurations can serve as constant current sources as well.

How are current sources created?

A current source can be made with a current mirror, where two BJT transistors are biased with the same base-emitter voltage to give the same (well, almost, the difference is two base currents) collector current.