Write a short note on static electricity.

Static electricity refers to the imbalance of electric charges on the surface or between or within a material.

When an object is negatively charged, the other one becomes positively charged when they are closer. The constant rubbing of these two objects creates an electron imbalance and a buildup of self-produced current produces static electricity.
This is observed in both insulators and conductor. For instance, sticking of hair to the wool of a hat is a result of this.
This phenomenon is more common in the dry season as moisture prevents electron transfer.

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Static Electricity – Important Concepts
Difference Between Primary Cell and Secondary Cell	Resistivity formula	Electromagnetic Field
Relation between power and resistance	Meter bridge	Resistance Formula
Resistivity Temperature Dependence	Internal resistance formula	Resistor Colour Codes
Current Electricity Important Questions	Potentiometer	Derivation of Drift Velocity
Difference between AC and DC	Current density	Combination of Resistors
Relation between resistance and length	Electrical Formula	Unit of Specific Resistance
Differences Between Acceleration and Velocity	Wheatstone Bridge	Power transformers
Cells, emf, Internal Resistance	Cells in Series and in Parallel	Ohm’s law
Difference between earth and neutral	Types of Current	Unit of Current
Physical Significance of Electric Field	Difference between kva and kw	Carbon Resistor
Difference between RTD and thermocouple	Conductivity	Ohm’s Law and its Limitations
Permittivity And Permeability	Ampere	Types of Resistors
Difference between emf and voltage	Drift Velocity	Power Of Alternating Current
Difference Between Ammeter and Voltmeter	Relation between kva and kw	Current density formula

CBSE CLASS XII Related Questions

The total charge of the two spheres is conserved.
Both spheres attain the same potential.
The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2)}{(r_1 + r_2)}$
The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2) (r_1 + r_2)}{r_1 r_2}$

CBSE CLASS XII Related Questions