Produced when the voltage changes
When the voltage in a circuit changes, several effects can occur depending on the nature of the circuit and the components in it. One of the most common effects is the production of an electromotive force (EMF) or voltage that can either oppose or enhance the change in voltage.
This EMF is produced due to various phenomena such as electromagnetic induction, piezoelectricity, thermoelectricity, electrostriction, and others. For example, in a transformer, when the voltage of the primary winding changes due to alternating current, it induces a corresponding voltage in the secondary winding due to electromagnetic induction.
Similarly, in a piezoelectric crystal, when the crystal is subjected to pressure or vibration due to a changing voltage, it produces a corresponding voltage due to the piezoelectric effect. In a thermocouple, a voltage is produced when two dissimilar metals are heated or cooled due to the thermoelectric effect.
Overall, whenever the voltage in a circuit changes, it can lead to various effects that can either be harnessed for useful purposes or need to be prevented or minimized to ensure the proper functioning of the circuit and its components.
When the voltage changes in a circuit, several things occur simultaneously. Here are the steps involved in the production of voltage change:
Step 1: Change in Input Voltage
The voltage change starts with a change in the input voltage, which can be initiated by various factors such as a power source, a switch being flipped, or a signal being transmitted.
Step 2: Electromagnetic Induction
When the input voltage changes, it causes a change in the magnetic field produced around the circuit. According to Faraday's Law of Electromagnetic Induction, the changing magnetic field induces an electromotive force (EMF) or voltage in a nearby conductor.
Step 3: Voltage Propagation
The induced voltage travels through the conductor, often in the form of an electrical signal. This signal carries the information about the voltage change and passes it along the circuit.
Step 4: Transmission and Amplification
The voltage change can be transmitted through various electrical components such as resistors, capacitors, and inductors. These components can modify the amplitude, phase, or frequency of the voltage change. Additionally, amplifiers can be used to increase or decrease the strength of the voltage signal.
Step 5: Voltage Output
Ultimately, the voltage change is measured or utilized by various devices in the circuit. These devices can include lamps, motors, sensors, or any electrical component that operates based on the voltage level. The output of the circuit, such as a change in light intensity or motor speed, is a direct result of the voltage change.
Overall, the production of voltage change involves the initiation of input voltage, electromagnetic induction, propagation of induced voltage, transmission and amplification in the circuit, and the final utilization or measurement of the voltage output.