# Quick Answer: How Do You Know If A Resistor Is Equivalent?

## Does it matter where a resistor is placed?

A resistor is a small component that’s designed to provide a specific amount of resistance in an electronic circuit.

Resistors are blind to the polarity in a circuit.

Thus, you don’t have to worry about installing them backwards.

Current can pass equally through a resistor in either direction..

## What causes resistors to fail?

Resistor failures are considered to be electrical opens, shorts or a radical variation from the resistor specifications. … A fixed composition resistor normally fails in an open configuration when overheated or overly stressed due to shock or vibration. Excessive humidity may cause an increase in resistance.

## How do you find equivalent resistors?

The method we use to calculate equivalent resistance is different for each type of circuit. For a series circuit, we simply add up the resistances of each component. However, in a parallel circuit, the reciprocal of the total resistance is equal to the sums of the reciprocals of the resistances of each branch.

## What can I use in place of a resistor?

Because of this, even a good electrical conductor, such as metal wire, can be used as a resistor. Resistance can be adjusted by limiting how thick the wire is, and by increasing or decreasing the conductive path through the wire. Resistance can also be controlled by wire material.

## How do you tell if a resistor is burnt out?

5 Answers. A burnt out resistor can only be read one of two ways. The first is the color code on the resistor, if it is through hole, or the number code if it is a smd resistor with a a number code. If that is not available, the only other way is a circuit diagram, or a reference design around the IC it is supporting.

## How do you know if a resistor is in series or parallel?

The trick is to look at the nodes in the circuit. A node is a junction in the circuit. Two resistor are in parallel if the nodes at both ends of the resistors are the same. If only one node is the same, they are in series.

## How do you tell if it is parallel or series?

In a series circuit, all components are connected end-to-end, forming a single path for current flow. In a parallel circuit, all components are connected across each other, forming exactly two sets of electrically common points.

## What happens when a resistor fails?

A resistor seldom fails short. If it is getting hot enough to fail, a short would typically dissipate even more power and cause the material to ignite or explode.

## Why is parallel circuit better than series?

Two bulbs in a simple parallel circuit each enjoy the full voltage of the battery. This is why the bulbs in the parallel circuit will be brighter than those in the series circuit. Another advantage to the parallel circuit is that if one loop is disconnected, then the other remains powered.

## Can I bypass a resistor?

A wire in the left circuit is shorting the 100Ω resistor. All current will bypass the resistor and travel through the short. So typically the assumption of a short is done by redrawing the circuit. …

## What would cause a resistor to burn?

Burning of Resistor 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’s better series or parallel wiring?

Series – When you wire (hook-up) speakers in Series, the speakers resistance (as measured in ohms) is additive – i.e. putting two 8 ohm speakers in Series results in a 16-ohm load. Parallel – When wiring in parallel, the resistance of the speakers decreases.