CIRCLE
A circle is the locus of a point which moves in a plane so that it is always at a constant distance from a fixed point in that plane. The fixed point is called the centre and the constant distance is called the length of the radius of the circle.
EQUATIONS OF A CIRCLE
1. THE CENTRE-RADIUS […]
SEMICONDUCTORSCONDUCTORS
A conductor is a substance that can conduct electricity or heat through it. In other words, we can say that a conductor is a substance that has a very high electrical or thermal conductivity (a measure of a substance to conduct heat or electricity). Conductors are usually […]
MAGNETIC FIELDS
DUE TO A STRAIGHT WIRE
As studied before the magnetic field due to a long current carrying wire is
B = ( m0i/4pd)(cosq1 - cosq2)
Now foe a long straight wire q1= 0 and q2= 180o, therefore the magnetic field is
B = m0i/2pd
SOLENOID
The magnetic field at any […]
EARTH’S GRAVITY
Earth’s gravity is defined as the force by which the earth attracts a body towards its centre. It is due to this force that a body thrown with a certain upward velocity ultimately fall back on the surface of the earth. The acceleration that a body gets when falling freely from a height towards […]
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