A light bulb is rated 100W for 220 V AC supply of 50 Hz. Calculate (a) resistance of the bulb. (b) the rms current through the bulb.
the given can be listed as Power P = 100W To Find , Resistance R = ? …
Showing posts from June, 2020Show All
Shortcuts used while solving elasticity numericals
Some important tips to remember for ELASTICITY Glass is more elastic than rubber Modul…
To find the velocity for a vehicle on a curved road
We will deal with a vehicle which is moving on a horizontal curved road, by some veloc…
Don'ts for solar eclipse
Some important don'ts for the solar eclipse. Don’t look at the Sun directly at any…
Newton's Corpuscular Theory
His assumptions (1) Newton thought that light is made up of light tiny and elastic pa…
Matter Waves- Its properties
(1) Matter wave represents the probability of tinding a particle in space. (2) Matter …
Some tricks while solving magnetism problems
Magnetic moment for any toroid is zero When a magnetic dipole of moment M moves from a…
Small hints while dealing with magnetic effects of electric current
The device whose working principle is based on Helmholtz coils and in which uniform ma…
Radioactivity
Half-life of a radioactive element The half-life of a radioactive element is defined a…
What are eddy currents ? Why and where are they undesirable & How they are minimised?
Whenever a conductor or a part of it is moved in a magnetic field cutting magnetic fie…
What is sphere if influence, surface tension and surface energy
Sphere of influence The sphere of influence of a molecule is defined as an imaginary s…
What are the properties of BJT(Bi-Polar Junction Transistor) & FET(Field Effect Transistors)
BJT It is a current controlled device. lnput resistance is low because input junction …
What is a Photovoltaic Cell
When a suitable light falling on a PN junction produces a potential dfferenec across i…
What is TEMPERATURE ?
Temperature is a measure of the average kinetic energy of the particles in an object …
Similarities and Dissimilarities between a matter wave and electromagnetic wave
Matter waves are produced due to charged as well as uncharged particles. But electroma…
Doors of a dam are 20m below the surface of water in the dam. If one door is opened what will be the speed of the water that flows out of the door ?
The given can be listed as, h= 20m g = 9.8m/s² To find, v = ? Solution -��…
HSC Result 2026
The result of HSC will be declared on 2nd May 2026 at 11am. It can be che…