Science > Physics > Stationary Waves > Numerical Problems Vibration of String Set-03 In this article, we shall study to solve problems to calculate fundamental frequency of vibration of string and its higher frequencies. Example 01: A stretched wire of length one metre gives 3 beats per second with a tuning fork. If the length […]
Category: Physics
Science > Physics > Stationary Waves > Numerical Problems Vibration of String Set-02 In this article, we shall study to solve problems to calculate fundamental frequency of vibration of string and its higher frequencies. Example 01: A stretched wire emits a fundamental note of 256 Hz. Keeping the stretching force constant and reducing the length […]
Science > Physics > Stationary Waves > Numerical Problems Vibration of String Set-01 In this article, we shall study to solve problems to calculate fundamental frequency of vibration of string and its higher frequencies. Important Formulae: For vibrating string pth overtone is (p + 1)th harmonic Frequency of qth harmonic = q x n Frequency […]
Categories
Emission and Absorption Spectra
Science > Physics > Refraction of Light > Emission and Absorption Spectra A spectrum is a pattern which gives the wavelengths of radiation emitted (or absorbed) by a substance. The spectra in the visible region are divided into two groups. Emission spectra and absorption spectra. We use a spectrometer to study a spectrum. Light from […]
Science > Physics > Electromagnetic Induction > Numerical Problems on Electromagnetic Induction In this article, we shall learn to solve numerical problems to find e.m.f. induced, change in flux, and change in magnetic induction. Example 01: A circular coil having 1000 insulated turns each of area 1.274 m2 is kept in a uniform magnetic field […]
Science > Physics > Motion in a Straight Line > Numerical Problems on Motion Under Gravity Set – 01 In this article, we shall study to solve problems to calculate time of ascent, time of descent, time of flight, maximum height reached, velocities at various points on path. Example – 01: Show that for a […]
Categories
Law of Radioactive Decay
In this article, we shall study the concept of radioactive decay, decay constant, and half life of radioactive substance. Transformation of radioactive element into another element (radioactive or non-radioactive) is known as radioactive decay or disintegration. In radioactive decay, the nucleus of a radioactive element called parent undergoes a spontaneous change accompanied by the emission […]
Categories
Reference Frames
Science > Physics > Newton’s Laws of Motion > Reference Frames Before studying Newton’s laws of motion, we shall understand a very important concept of reference frames in this article. Motion is a Relative Concept: Motion is always with respect to the observer. Consider a person A is standing in a train moving in the […]
Categories
Numerical Problems on Viscosity
In this article we shall study to solve problems on calculation of viscous force, coefficient of viscosity, and velocity gradient. Example 01: Calculate the horizontal force required to move a metal plate of area 2 x 10-2 m2 with a velocity of 4.5 x 10-2 m s-1 when it rests on a layer of oil […]
Categories
Numerical Problems on Levers
Science > Physics > Simple Machines > Numerical Problems on Levers Example 01: In a lever, the effort arm is 60 cm and load arm is 40 cm. Find its mechanical advantage: Given: Effort arm = E.A. = 60 cm, Load arm = L.A. = 40 cm To Find: Mechanical advantage = M.A. =? Solution: […]