What is psychological reactance in psychology?
Reactance is an unpleasant motivational arousal that emerges when people experience a threat to or loss of their free behaviors. It serves as a motivator to restore one’s freedom. The amount of reactance depends on the importance of the threatened freedom and the perceived magnitude of the threat.
What is a psychological threat?
We define the experience of psychological threat as an uncomfortable and aversive state that results from an actual or perceived discrepancy between one’s current state and an end state (Kim and Rucker, 2012, Lazarus and Folkman, 1984).
How do you reduce reactance?
5 Ways to Reduce Reactance
- Acknowledge: Greet visitors in the hallways, elevators, and cafeteria with a smile or a greeting.
- Introduce: Consistently introduce yourself by name and your role in the department and let your customers know that you or your coworkers are going to take care of them.
What is reactance bias?
The tendency to do the opposite of what someone wants you to do because you think they are trying to constrain your freedom of choice. Reactance can occur when someone pressures you to accept a certain viewpoint.
What causes reactance?
Inductive reactance is caused by devices in which wire is wound circularly — such as coils (including line reactors), chokes, and transformers. Reactance that occurs in a capacitor is known as capacitive reactance.
What do you mean by reactance?
In electric and electronic systems, reactance is the opposition of a circuit element to the flow of current due to that element’s inductance or capacitance. Greater reactance leads to smaller currents for the same voltage applied.
What is reactance and resistance?
Resistance and reactance are the properties of an electrical circuit that opposes the current. The main difference between reactance and resistance is that resistance measures the opposition to a flow of current, whereas reactance measures the opposition to a change in current.
What is the difference between inductance and resistance?
Resistance is a constant pushback against electrical force, much like friction. Inductance is resistance to a change in electrical force, much like inertia. If current flows through a circuit with high inductance, the current will continue flow at a similar rate, resisting any changes to the flow.
Why does a capacitor block DC?
When an AC voltage is connected to the capacitor initially the plates get charged. Later when the direction of the AC supply changes the capacitor will discharge. This process continues due to the change in supply voltage.
Why do we use resistance?
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.
What exactly is impedance?
Electrical impedance, measure of the total opposition that a circuit or a part of a circuit presents to electric current. Impedance includes both resistance and reactance (qq. v.). The resistance component arises from collisions of the current-carrying charged particles with the internal structure of the conductor.
What is impedance simple words?
The definition of an impedance is any obstruction, or the measure of the opposition of an electric current to the energy flow when voltage is applied. An example of impedance is a line of resistance within an electrical current.
Why do we need impedance matching?
Our goal with impedance matching is to make the load impedance seem to look like the source impedance. Matching the impedances throughout the circuit yields a desired low voltage standing wave ratio (VSWR). Low VSWR circuits transfer the maximum amount of power from the source to the load.
What is impedance diagram?
The impedance diagram is the equivalent circuit of power system in which the various components of power system are represented by their approximate or simplified equivalent circuits. The impedance diagram is used for load flow studies.
What is the difference between one line diagram and impedance diagram?
Single line diagram is drawn on per phase basis. A power system with LLG, LG and LL faults becomes unbalanced and can not be represented in per phase basis. 7. In impedance diagram different power system elements are represented by symbols.
What is the difference between one line impedance diagram and reactance diagram?
The equivalent simplified impedance diagram for this one line diagram can be drawn as in Figure 2. Circuit breakers are not required to include in the impedance diagram. In reactance diagram, all elements are represented in terms of reactance only. No resistance element exists in the system.
What is the impedance triangle?
The triangle that is created when adding the resistance to the reactance is known as an impedance triangle. Figure 22. Impedance triangle. In an impedance triangle, the resistance (r) is always on the bottom of the triangle, the reactance (x) always goes on the side and the hypotenuse is always the impedance (z).
What is the use of impedance triangle?
Impedance Triangle – Is used to calculate Impedance when resistance (R), Inductance (L) and Capacitance (C) are all present in the circuit, and the total reactance (X) is the difference between the Inductive Reactance (XL) and Capacitive Reactance (XC).
Is impedance triangle a phasor diagram?
from a LR Phasor Diagram. This combination of reactance plus resistance is not simply the sum of these quantities. The three sides of the triangle represent the three voltage phasors in the circuit VR VL and VS. Because the circuit components are in series, the same current is common to them all.
What is sin PHI from impedance triangle?
Impedance Triangle Note that impedance, which is the vector sum of the resistance and reactance, has not only a magnitude (Z) but it also has a phase angle (Φ), which represents the phase difference between the resistance and the reactance. Of course, resistance (R) will always remain constant.
What is the power triangle?
Power Triangle is the representation of a right angle triangle showing the relation between active power, reactive power and apparent power. The power which flows back and forth that means it moves in both the direction in the circuit or reacts upon it, is called Reactive Power.
What is the formula of power factor?
Power factor (PF) is the ratio of working power, measured in kilowatts (kW), to apparent power, measured in kilovolt amperes (kVA). Apparent power, also known as demand, is the measure of the amount of power used to run machinery and equipment during a certain period. It is found by multiplying (kVA = V x A).