# What does it mean when a resistor is infinite?

## What does it mean when a resistor is infinite?

When an ohmmeter points to the infinity symbol, it means that there is no continuity between the two test leads and that an open circuit is present.

Can you have infinite resistance?

When resistance is infinite, there no longer needs to be current flow for a potential difference. In steady state, it acts like an open circuit. The voltage source is driving the potential difference across the resistor but the circuit is producing no current.

### What happens when resistance is 0?

A short circuit implies that the two terminals are externally connected with resistance R=0 , the same as an ideal wire. This means there is zero voltage difference for any current value. This means that zero current can flow between the two terminals, regardless of any voltage difference.

What happens when a resistor is overloaded?

When a resistor has been overloaded with voltage exceeding its power rating, the resistor will become very hot to touch, darken considerably and possibly even melt or catch on fire. Although a resistor may appear damaged at this point, it can still be functioning.

#### What does infinity mean in the multimeter?

On a VOM, infinity signifies an open circuit. On an analog multimeter, infinity shows up as an unwavering needle that won’t move off the far left side on the display. On a digital multimeter, infinity reads “0. L.” On a VOM, “zero” means a closed circuit has been detected.

Why is an open circuit has infinite resistance?

An open circuit describes that the two terminals points are externally disconnected. This is equivalent to a resistance Infinity. Thus, it means that zero current can flow between the two terminals.

## Why does current source have infinite resistance?

When connected to a load resistance, the current source manages the voltage in such a way as to keep the current constant; so in an ideal current source the voltage across the source approaches infinity as the load resistance approaches infinity (an open circuit).

Why resistance is infinite in current source?

An ideal current source would provide no energy to a short circuit and approach infinite energy and voltage as the load resistance approaches infinity (an open circuit). An ideal current source has an infinite output impedance in parallel with the source. The internal resistance of an ideal currentsource is infinite.

### Can there be current without resistance?

Superconductivity, by definition, is a current flowing without resistance. This is only possible if the voltage across the junction is 0, otherwise there would necessarily be both current and voltage and therefore an effective resistance R=V/I.

Can voltage exist without current?

Voltage attempts to make a current flow, and current will flow if the circuit is complete. It is possible to have voltage without current, but current cannot flow without voltage.

When a resistor fails, it either goes open (no connection) or the resistance increases. When the resistance increases, it can burn the board, or burn itself up.

Can a resistor explode?

4 Answers. In my experience, resistors and diodes burn, but they don’t explode. The only components that I’ve experienced exploding are tantalum capacitors when placed with the wrong polarity and transient voltage suppressors (“tranzorbs”) when exposed to ~2x their rated voltage.

## Is there such thing as an infinite resistance?

In short, resistance is a measurement of how easy it is for an electrical current to flow through a certain component or (part of) a circuit. If you’ve ever tried measuring resistance, you might have come across an infinite resistance.

Is the infinite resistance open circuit or short circuit?

Infinite resistance is open circuit (burnt resistor in real life) no current will flow, zero ohms is short circuit. Lets not confuse. You must log in or register to reply here.

### What happens when a resistor is destroyed in an open circuit?

If the resistors are connected in series then no current will flow due to the infinite resistance (open circuit). if the resistors are connected in parallel then current will flow only through R1 and R2. “fail open” means resistor has been destroyed.

Why is there no resistance on a multimeter?

Remember that the multimeter is measuring resistance by measuring the flow of electrical current. A lack of current could mean that a resistor is indeed giving off that much resistance, but a more common explanation for the lack of current is a broken connection or an open switch.