Q:what is voltage
Answer:Voltage is the measure of electric potential difference between two points in an electrical circuit. It represents the "push" or pressure that drives electric current through a circuit. Think of it like water pressure in a pipe; the higher the pressure, the more water can flow.
Q:what is current
Answer:A current is the flow of electric charge, typically electrons, through a conductor.This flow is caused by a potential difference,or voltage, and is measured in amperes (A), with a higher current meaning more electricity is flowing. Think of it like water flowing in a river: the voltage is the force pushing the water, and the resistance of the riverbed affects the flow.
Q:what is emf
Answer:EMF, or Electromotive Force, is the electrical energy supplied by a source (like a battery or generator) per unit charge to push charges through a circuit, measured in volts (V). It represents the potential for a source to move charge, fundamentally understanding how devices convert one form of energy into another to create electrical energy.
Q:what is electrical power
Answer:Electrical power is the rate at which electrical energy is transferred or work is done within a circuit. Its standard unit is the watt (W), which is equivalent to one joule per second. Power is calculated by multiplying voltage (V) by current (I) (P = V x I), and it indicates how fast an electrical device uses or supplies energy. Key aspects of electrical power:
Definition:
Power is the speed at which energy is transferred or transformed.
Unit:
The SI unit for power is the watt (W), where 1 watt equals 1 joule per second.
Formula:
The basic formula for electrical power is P = V × I.
P is power in watts.
V is voltage in volts.
I is current in amperes.
Q:what is Mutual induction
Answer:Mutual induction is an electromagnetic phenomenon where a changing electric current in one coil induces an electromotive force (voltage) in a nearby coil, or vice versa, due to the changing magnetic field created by the first coil. This principle is fundamental to the operation of transformers and other electronic devices, relying on the magnetic flux linking the two coils. The extent of this induced voltage is quantified by the coefficient of mutual induction, also known as mutual inductance (M), with the SI unit being the Henry (H).
Q:Coefficient of Mutual Induction equation
Answer:The coefficient of mutual induction (M) quantifies the extent to which a change in current in one coil induces an EMF in the other coil.It is defined mathematically as
M=$$\frac{N_{2}\Phi_{12}}{I_{1}}$$
- M is the mutual inductance,
- N2 is the number of turns in the second coil,
- Φ12 is the magnetic flux through the second coil due to the current I1 in the first coil.
Q:What is resistance?
Answer:Resistance is the opposition of a material to the flow of electric current, caused by collisions between moving electrons and the atoms or molecules of the material, which convert electrical energy into heat. It is measured in ohms (Ω) and is a fundamental property of materials that influences how much current flows for a given voltage, as defined by Ohm's Law (V=IR).