1.2K Ohm 1/4 Watt Resistor

Product: 1.2K Ohm Resistor

Power: 1/4 Watt.

Tolerance: ±5%

Manufactured: China.
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What is a 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. High-power resistors that can dissipate many watts of electrical power as heat, may be used as part of motor controls, in power distribution systems, or as test loads for generators. Fixed resistors have resistances that only change slightly with temperature, time or operating voltage. Variable resistors can be used to adjust circuit elements (such as volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity.)
Resistors can be fabricated in a variety of ways. The most common type in electronic devices and systems is the carbon-composition resistor. Fine granulated carbon (graphite) is mixed with clay and hardened. The resistance depends on the proportion of carbon to clay; the higher this ratio, the lower the resistance.
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Another type of resistor is made from winding Ni-chrome or similar wire on an insulating form. This component, called a wire wound resistor, is able to handle higher currents than a carbon-composition resistor of the same physical size.

The resistor is a component that resists the current. If you add a resistor in series with a circuit – the current in the circuit will be lower than without the resistor.

What Does The Resistor Do To My Circuit?
The resistor is a passive device and doesn’t do anything actively to your circuit.

It’s actually a pretty boring device. If you add some voltage to it, nothing really happens.

By using resistors, you can design your circuit to have the currents and voltages that you want to have in your circuit.

So the resistor gives the designer control over his circuit! How about that?