Allergies develop when your immune system reacts to a foreign substance or food that normally causes no reaction in most people, such as pollen, bee venom, or pet dander. Antibodies are chemicals produced by your immune system. When you have allergies, your immune system produces antibodies that mistakenly label a harmless allergen as hazardous. Your immune system’s reaction to the allergen can inflame your skin, sinuses, airways, or digestive tract when you come into touch with it.
Sneezing and an itchy, runny, or clogged nose (allergic rhinitis) itchy, red, watery eyes (conjunctivitis) wheezing, chest tightness, shortness of breath, and cough are all common signs of an allergic reaction.
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west of the geographic north. The north tip of the magnetic needle of a dip circle placed in the plane of magnetic meridian points above the horizontal. The horizontal component of the earth’s field is measured to be 
Specify the direction and magnitude of the earth’s field at the location.At a certain location in Africa, a compass points 
and 
carrying currents of 
and 
in the same direction are separated by a distance of 
. Estimate the force on a 
section of wire A.
wire carrying a current of 
is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 
. What is the magnetic force on the wire?
and making an angle of 
with the direction of a uniform magnetic field of 
. What is the magnitude of the field 
at a point 
from the wire?
-turns carrying current 
.
is at distance 
from the wire. Find the force acting on the electron if its velocity is directed towards the wire.