Electricity (Physics) (Part-1)

The unit of the physical quantity "Inductance" in the International System of Units (SI) is the henry, with the symbol H.

One henry is defined as the inductance that produces a voltage of one volt when the current through it changes at a rate of one ampere per second. 

Mathematically, this can be expressed as:

Where:

• $V$ is the induced voltage in volts (V) 
• $L$ is the inductance in henries (H)
• dI/dt​ is the rate of change of current in amperes per second (A/s)

• It was discovered by Nicholas Callen in 1836.
• It consists of two coils wrapped on a core, which are called the primary and secondary coils.
• Vehicles have ignition coil on the principle of the induction coil.

• Outside the scientific community and by the media, this article is referred to as the God Particle.
• Britain's Peter Higgs and Belgium's François Englert were awarded the 2013 Nobel Prize in Physics for the discovery of the Higgs boson particle.

• Outside the scientific community and by the media, this article is referred to as the God Particle.
• Britain's Peter Higgs and Belgium's François Englert were awarded the 2013 Nobel Prize in Physics for the discovery of the Higgs boson particle.

• This adjustment is used in domestic electrical wiring installation to obtain minimum resistance.

1. It refers to the effect in which a spectral line obtained from a light source is split into parts due to the presence of a magnetic field.
2. The Zeeman effect is a valuable tool in both physics and astronomy:

• Physics: It helps in understanding the energy levels and magnetic properties of atoms.
• Astronomy: It is used to measure the magnetic fields of stars, including our Sun, and other celestial objects. The splitting pattern of spectral lines observed from these objects can reveal the strength and structure of their magnetic fields.

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.

Key Characteristics of a Resistor:

• Passive Component: It doesn't generate its own energy but rather dissipates electrical energy in the form of heat.
• Two-Terminal: It has two points of connection in a circuit.
• Electrical Resistance: Its primary function is to oppose the flow of electric current. The amount of opposition is quantified by its resistance value, measured in ohms ($\Omega$).

The statement "the total current entering a junction equals the total current leaving the junction" is known as Kirchhoff's Current Law (KCL).

Kirchhoff’s Current Law (KCL)

Definition:
At any electrical junction (or node) in a circuit, the sum of currents flowing into the junction is exactly equal to the sum of currents flowing out of the junction.​

Reason:
This law is based on the conservation of electric charge — charge cannot accumulate at a junction, so whatever current flows in must flow out.

Example:

If 3 amps of current flows into a junction from one branch, and 2 amps flow in from another, then the total current flowing out must be 5 amps.

• The reason for creating a magnetic field is the movement of charges in an electric conductor.
• The magnitude of the magnetic field produced around the conductor depends on the magnitude of the current flowing in the wire.
• When the value of the electric current increases or decreases, the magnitude of the Magnetic field also increases or decreases.

me of the major electrical waves are

• Gamma rays,
• X-rays,
• Ultraviolet waves,
• Visible radiation,
• Infrared rays, etc.

The cathode ray is not an electromagnetic ray.