Physics Q and A -

MOTION

by adminMay 9, 2025May 9, 20250

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 $I$ along the $+z$ -direction and produces the magnetic field $\vec{B}$ . The magnitude of the line integral $\int \vec{B} \cdot d\vec{l}$ along a straight line from the point $(-\sqrt{3}a, a, 0)$ to $(a, a, 0)$ is given by:
$\text{[} \mu_0 \text{ is the magnetic permeability of free space.] }$

by adminApril 26, 2025April 26, 20250

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 $e$ , permittivity of free space $\varepsilon_0$ , Planck’s constant $h$ , and speed of light $c$ . If the dimensionless quantity is written as $e^\alpha \varepsilon_0^\beta h^\gamma c^\delta$ and $n$ is a non-zero integer, then $(\alpha, \beta, \gamma, \delta)$ is given by

by adminApril 23, 2025April 23, 20250

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

by adminApril 22, 2025April 22, 20250

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 Fast Do Electromagnetic Waves Travel?

by John DoeApril 17, 2025April 19, 20250

Electromagnetic waves are the backbone of modern technology, powering everything from radio broadcasts to MRI machines. A fundamental question about these waves is: How fast …

How To Find Instantaneous Velocity

by adminApril 17, 2025April 17, 20250

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

by adminApril 14, 2025April 14, 20250

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 …

Which of Dalton’s Postulates Were Incorrect?

by adminApril 6, 2025April 6, 20250

Learn which of Dalton’s postulates were incorrect, why isotopes and subatomic particles reshaped atomic theory, and explore a detailed accuracy comparison table. John Dalton’s atomic …

How to Calculate Moment of Inertia

by adminMarch 15, 2025March 15, 20250

Let’s talk about something we’ve all experienced but maybe never noticed: rotational motion. Ever wondered why a figure skater spins faster when they pull their arms …

How to Calculate Enthalpy Change: Methods, Formulas, and Examples

by adminMarch 10, 2025March 10, 20250

Learn how to calculate enthalpy change using calorimetry, Hess’s Law, standard enthalpies, and bond energies. Includes formulas, examples, and a comparison table. Enthalpy change (ΔH) …