Can current be negative?
Can current be negative? As from question you thought that its wrong, but no friend question is right but current is never negative but its calculation at end its as…
How is a capacitor different from a battery?
Batteries and condensers seem similar because they store and release electricity. However, there are key differences between them that affect their potential applications due to how they work differently. A…
Can there be a potential difference without current?
The electric potential is the potential electric power per unit charge, measured in joules per coulomb (volts). The “electric potential” must be distinguished from the “electric potential” by noting that…
What would happen to the voltage if you increase the resistance or what is varistor?
A varistor is an electronics component with an electrical resistance that varies with applied voltage. Also known as a voltage-dependent resistor (VDR), it has a non-linear, non-ohmic current characteristic that…
What happens to a resistor when it fails?
A fixed composition resistor normally fails in an open configuration when overheated or too demanding due to shocks or vibrations. Excessive humidity can cause an increase in resistance. A resistive…
What happens when a resistor is short circuited?
A short circuit is an abnormal connection between two nodes of an electrical circuit designed to be at different voltages. This results in an electric current limited only by the…
What is a pure inductor?
Inductors do not behave just like resistances. While the resistors simply oppose the flow of electrons through them (by lowering a voltage directly proportional to the current), the inductors resist…
Why do you use a resistor with an LED?
When you talk about resistor with LED then first in your mind got Why do you need an LED resistor? Resistor used in LED to limit the LED current to…
What do you use a resistor for?
Resistor can be used to reduce the voltage or current available in a circuit by adding resistance between 2 components of circuit. The role of the resistor in an electrical circuit:…
What is the resistor colour code?
Resistance values are often indicated by color codes, Resistor color code is identification of that resistor’s resistance, some resistor is very small in size and some very big but its…
What is a resistor and how does it work?
A resistor is a passive electrical component with two terminals that implements the electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust…
What does KA mean on a circuit breaker?
A circuit breaker is an automatically actuated electrical switch designed to protect an electrical circuit from damage caused by excessive current, usually resulting from an overload or a short circuit….
What is PSM in relay?
In the field of electrical engineering, a relay is a relay device designed to trip a switch when an error is detected. The first protection relays were electromagnetic devices based…