Resistor FAQs:

Q: Is a resistor a passive two-terminal electrical component that implements electrical resistance as a circuit element?

A: Yes.

Q: Are resistors usually coated with nickel chromium?

A: Yes, but might be coated with any of the cermet materials listed above for thin film resistors.

Q: Are resistors manufactured using screen and stencil printing processes?

A: Yes.

Q: Are resistors usually specified with tolerances of 0.1, 0.2, 0.5, or 1%, and with temperature coefficients of 5 to 25 ppm/K?

A: Yes, They also have much lower noise levels, on the level of 10–100 times less than thick film resistors.

Q: Are resistors used in applications requiring high pulse stability?

A: Yes.

Q: Is a resistor protected with paint or plastic?

A: Yes.

Q: Are resistors often used for their better noise characteristics?

A: Yes.

Q: Are resistors designed to withstand unusually high temperatures of up to 450 °C?

A: Yes, Wire leads in low power wirewound resistors are usually between 0.6 and 0.8 mm in diameter and tinned for ease of soldering.

Q: Are resistors physically larger and may not use the preferred values?

A: Yes, and color codes, and external packages described below.

Q: Are resistors made of metal oxides which results in a higher operating temperature and greater stability/reliability than Metal film?

A: Yes.

Q: Are resistors similar to those of composition resistors with the exception of the high frequency?

A: Yes.

Q: Were resistors commonly used in the 1960s and earlier?

A: Yes, but are not popular for general use now as other types have better specifications, such as tolerance, voltage dependence, and stress.

Q: Are resistors extremely low?

A: Yes, and has been further improved over the years.

Q: Are resistors manufactured in values from a few milliohms to about a gigaohm in IEC60063 ranges appropriate for their tolerance?

A: Yes.

Q: Is a resistor a special alloy foil several micrometers thick?

A: Yes.

Q: Is a resistor specified by its resistance: common commercial resistors are manufactured over a range of more than nine orders of magnitude?

A: Yes.

Q: Are resistors a few hundred volts?

A: Yes, and this is a problem only in applications where these voltages are encountered.

Q: Are resistors sold into automotive?

A: Yes, and industrial, and military applications.

Q: Are resistors also implemented within integrated circuits?

A: Yes.

Q: Are resistors coils they have more undesirable inductance than other types of resistor?

A: Yes, although winding the wire in sections with alternately reversed direction can minimize inductance.

Q: Are resistors also characterized according to its form factor?

A: Yes, that is, the size of the device and the position of its leads which is relevant in the practical manufacturing of circuits using them.

Q: Is a resistor increased?

A: Yes, as the independently fluctuating resistances of smaller components tend to average out.

Q: Is a resistor made of a stack of carbon disks compressed between two metal contact plates?

A: Yes.

Q: Are resistors too small?

A: Yes, and physically, to permit practical markings to be applied.

Q: Are resistors substantially worse than that of a composition resistor?

A: Yes.

Q: Were resistors made in more or less arbitrary round numbers?

A: Yes, a series might have 100, 125, 150, 200, 300, etc.

Q: Are resistors commonly made by winding a metal wire?

A: Yes, and usually nichrome, around a ceramic, plastic, or fiberglass core.

Q: Are resistors used?

A: Yes, Resistors are not only specified with a maximum power dissipation, but also for a maximum voltage drop.

Q: Is a resistor sometimes used to describe a resistor of any type connected to the control grid of a vacuum tube?

A: Yes.

Q: Are resistors still available?

A: Yes, but comparatively quite costly.

Q: Is a resistor a large convection-cooled lattice of stamped metal alloy strips connected in rows between two electrodes?

A: Yes.

Q: Are resistors rated according to their maximum power dissipation?

A: Yes.

Q: Was a resistor painted for color-coding of its value?

A: Yes.

Q: Are resistors marked with a four-digit code?

A: Yes, and in which the first three digits are the significant figures and the fourth is the power of ten.

Q: Are resistors non-inductive that provide benefit when used in voltage pulse reduction and surge protection applications?

A: Yes.

Q: Is a resistor bonded with adhesive to an object that is subjected to mechanical strain?

A: Yes.

Q: Are resistors no longer used in most applications?

A: Yes.

Q: Are resistors used to reduce current flow?

A: Yes, and adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.

Q: Are resistors specified and manufactured over a very large range of values?

A: Yes, and the derived units of milliohm , kilohm , and megohm are also in common usage.

Q: Are resistors used when an adjustable load is required?

A: Yes, for example in testing automotive batteries or radio transmitters.

Q: Is a resistor proportional to the current , where the constant of proportionality is the resistance?

A: Yes, For example, if a 300 ohm resistor is attached across the terminals of a 12 volt battery, then a current of 12 / 300 = 0.04 amperes flows through that resistor.

Q: Is a resistor more than its power rating, damage to the resistor may occur, permanently altering its resistance?

A: Yes, this is distinct from the reversible change in resistance due to its temperature coefficient when it warms.

Q: Are resistors sometimes described as "cement" resistors?

A: Yes, though they do not actually contain any traditional cement.

Q: Are resistors usually far more expensive than thick film resistors?

A: Yes.

Q: Is a resistor observed only when current flows through it?

A: Yes.

Q: Are resistors common elements of electrical networks and electronic circuits and are ubiquitous in electronic equipment?

A: Yes.

Q: Are resistors made by sputtering the resistive material onto an insulating substrate?

A: Yes.

Q: Are resistors marked numerically, if they are big enough to permit marking?

A: Yes, more-recent small sizes are impractical to mark.

Q: Are resistors also specified as having a maximum power rating which must exceed the anticipated power dissipation of that resistor in a particular circuit: this is mainly of concern in power electronics applications?

A: Yes.