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What are Magnetic Fields?
Like electric and gravitational fields, a magnetic field is a construct which helps you determine the force on a pole due to a magnet generating the field. The force drops off as you move away from the magnet just as for gravitational and electric fields. The arrows of the field indicate the direction that a north pole would be pushed. The density of field lines is proportional to the strength of the magnetic field: the more lines the stronger the field, and the fewer lines, the weaker the field. Sometimes we speak of the density of field lines as the magnetic flux, which is the quantity of field lines passing through normal to a surface area. More flux means a stronger field, and less flux means a weaker field.
There is a weak magnetic field around the Earth which we use for direction every time we use a compass (a small magnet which will line up with the Earth's magnetic field lines).
To free a charged a particle freely in air under the persuade of electric field its downward weight should be balanced by upward electric force for instance if a positive charge is
Radiation and Radioactivity Investigator of radioactivity discovered that certain natural elements, primarily the very heavy ones, have unstable nuclei that disintegrate to emi
Light is quantized. Photons are light quanta. It has zero REST mass. Therefore, it always travels at maximum speed permitted by relativity
Write down the Maxwell's electromagnetic wave equations both in differential form.
A fishing line's lead sinker has a volume of 1.40 x 10 -5 m 3 . The density of lead is 1.2 x 10 4 kg/m 3 . What is the apparent weight of the sinker when immersed in freshwat
Polarization: The dipole moment per unit volume of the solid is the sum of all the individual dipole moments within that volume and is called as 'Polarization' P of the solid.
Can you explain Ohms Law? Ans. If Temperature remains constant then current flow is directly proportional to applied Voltage. I ∝ V, I = V/R (resistance of the conductor)
Q. Measurement of Wavelength of Monochromatic Light? Monochromatic Light is allowed to fall on plate G 1 . The M.I. is adjusted for circular fringes. For this mirror M 1 is ma
What do you mean by pure spectrum? What is an impure spectrum?
Sample Problem: Consider laminar flow through two infinitely wide parallel plates spaced D apart from one another. What is the thermal entry length?
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