✓ A Resistor Used To Control Current In A Circuit Is Called

A Resistor Used To Control Current In A Circuit Is Called

Regarding electricity the opposite force to a current flow is called resistance for direct current dc circuits and inductance for alternating current ac. The resistance of the connecting wires in a series circuit is generally greater than the resistance of the load.

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Resistors are basically used for controlling voltage and current in a circuit which becomes highly crucial for operating the various active sophisticated components.

A resistor used to control current in a circuit is called. Resistors are common elements of electrical networks and electronic circuits and are ubiquitous in electronic equipment. Variable resistors can be used to adjust circuit elements such as a volume control or a lamp dimmer or as sensing devices for heat light humidity force or chemical activity. If there is a short circuit or an open circuit the voltage and current will change and trigger the trouble alarm.

For example a bjt such as a bc547 or similar may need a properly calculated resistor across its baseemitter in order to function optimally and safely. The resistor is a passive component as it can not operate without energy supply. The fuse is a short piece of thin wire which overheats and melts to break the circuit if current of more than its rated value flows through it.

Variable resistor can be used as a rheostat to control current or as a potential divider to control voltages. These components of substance are used to reduce the flowing current control the circuit. The total resistance for the following circuit is 75 ohms.

It also maintains the voltage level or divide voltage in the circuit adjusts the signal level. If you look at the resistor image there are 4 color bands pained on it. A resistor with a movable contact which is adjusted by turning a shaft is called an resistor.

The resistor has a calibrated and known voltage drop and current while the circuit is normal. Assume that the battery switch fuse and wires have zero ohms resistance and that the resistance of connecting wires switches and fuses are negligible and do not enter into circuit calculations a. A resistor in a sensor circuit is used as a simple way to monitor the function of the circuit.

A fuse is connected in series to protect devices in the circuit. What is the resistance value for resistor r2. There are many uses for a variable resistor potentiometer but the most common is to change the amount of current that can get through a circuit.

For instance a dimmer switch on a light bulb a speed controller on an electric drill and the volume control on a radio all use variable resistors. Any time one is measuring the resistance of a circuit power should be removed from the circuit.