Table of Contents
What is the terminal of resistor?
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.
Which terminal of a resistor is positive?
Resistors don’t care which leg is connected to positive or negative. The + means where the positive or red probe of the volt meter is to be placed in order to get a positive reading. This is called the “positive charge” flow sign convention.
What are the two terminals of a resistor?
An open circuit is a two-terminal device whose resistance is infinite. ) and a third terminal connection (called the wiper) that taps into the middle of the resistor.
What does a resistor look like?
From the outside, all resistors look more or less the same. As you can see in the top photo on this page, a resistor is a short, worm-like component with colored stripes on the side. It has two connections, one on either side, so you can hook it into a circuit.
Does resistor have positive or negative terminal?
Resistors don’t have positive or negative terminal. However, when current flows through a resistor then the voltage drop across the resistor do have a polarity. Polarity of voltage drop depends upon the direction of current as shown in figure below.
What are the three terminals of a transistor?
A bipolar transistor has terminals labeled base, collector, and emitter. A small current at the base terminal (that is, flowing between the base and the emitter) can control or switch a much larger current between the collector and emitter terminals.
Does resistor go on positive or negative?
If you think of the wire as being a pipe electricity flows through, you can think of a resistor as being a narrow part of that pipe, that chokes off the flow. Resistors don’t have positive and negative sides — you can hook them up in either direction and they work just the same.
Which way does current flow in a resistor?
Figure 3.1. The voltage and current definitions; a circuit with a battery; and a drawing of a resistor. Checkpoint 3.1 : There is 1 V across a resistor, and 5 mA is flowing. What is the resistance?
How do you know if a resistor is fusible?
In WWF series, resistors up to 5W, the resistance value is colour coded with 3 bands plus a tolerance band. An additional white band indicates that the resistor is fusible. For resistors 6W and above, the value is printed on the resistor.
How to determine the resistance of a resistor with colours?
Q1) Determine the resistance of the given resistor with the given colour sequence (Red, Green, Red, Gold). As we know, the first two colours represent the significant digits of resistance value so the given colours represent digits 2 and 5. The third band is a multiplier band. Hence, the colour red represents a multiplier factor of 10 2.
What is the positive and negative terminal of a a resistor?
A resistor don’t have any fixed positive or negative terminal. It depends on the circuit that which terminal of the resistor will be at positive polarity w.r.t its othar terminal.
How do you find the second number on a resistor?
Look at the color of the second band to find the second number. To the immediate right of the first colored band is a second colored band. Locate the band and identify what color it is. Then, consult the resistor color chart to identify the second number in the value of the resistor.
How do you read resistor bands?
1 To read them, hold the resistor such that the tolerance band is on your right. 2 Starting from your left, note down all the colours of the bands and write them down in sequence. 3 Next, use the table given below to see which digits they represent. 4 The band just next to the tolerance band is the multiplier band.