Sound
by 📘 Chapter Overview This chapter explores sound’s nature, production, propagation, and characteristics. It discusses how sound waves travel, their speed in various media, concepts of …
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Work and Energy
📘 Chapter Overview This chapter explains the concepts of work, energy, and power in science. It covers how work is done, how energy changes form, …
Gravitation
📘 Chapter Overview The chapter “Gravitation” introduces the universal force of attraction between objects – gravity. It explains Newton’s law of gravitation, free fall, weight, …
Force and Laws of Motion
🔷 Chapter Overview This chapter introduces Newton’s Laws of Motion, explains the concept of force, inertia, momentum, and gives a mathematical foundation to understand how …
MOTION
Chapter 7 – Motion (Class 9 Science)This chapter introduces the fundamental concepts of motion in physics. It helps students understand how objects move, how their …
An infinitely long wire, located on the z-axis, carries a current 
along the 
-direction and produces the magnetic field 
. The magnitude of the line integral 
along a straight line from the point 
to 
is given by: ![\[\text{[} \mu_0 \text{ is the magnetic permeability of free space.] }\]](https://physicsqanda.com/wp-content/ql-cache/quicklatex.com-6fb2ec46352283c27508e5caa3e72929_l3.png "Rendered by QuickLaTeX.com")
Problem: An infinitely long wire, located on the z-axis, carries a current along the -direction and produces the magnetic field . The magnitude of the …
A dimensionless quantity is constructed in terms of electronic charge 
, permittivity of free space 
, Planck’s constant 
, and speed of light 
. If the dimensionless quantity is written as 
and 
is a non-zero integer, then 
is given by
Problem: A dimensionless quantity is constructed in terms of electronic charge , permittivity of free space , Planck’s constant , and speed of light . …
Newton’s Laws of Motion: Definitions, Examples, and Real-World Applications
Imagine riding in a car that suddenly stops — the body continues to move forward until the seatbelt pulls it back. This everyday experience perfectly …
How To Find Instantaneous Velocity
To find the instantaneous velocity of an object, we have to use the concept of limits and derivatives(calculus). Instantaneous velocity is defined as the velocity …
How Are Electric Eels Electric? Unveiling the Shocking Science Behind Nature’s Living Powerhouse
Electric eels (Electrophorus spp.) are one of nature’s most electrifying marvels, capable of generating up to 860 volts of electricity—enough to stun a horse! But …