Electric Potential

Electric Potential

• Electric Potential is a kind energy (Work).
• When a unit positive charge is brought any point in electric field from infinity, some amount of work has to be done .This work is known as electric potential of the point.
• Electric potential of a point in electric field is equal to work done per coulomb charge to bring it from infinity.
• Suppose'W' work is required to bring 'Q' charge from infinity to a point in electric field. Then electric field potential of that point is 'W/Q'(Joule /coulomb) Measured in volt.
• Usually electric Potential is denoted by a letter–V

Determination of electric potential of any point in an electric field

To find the electric potential at a given point, you can imagine moving a postive test charge of magnitude 1 coulomb from infinity to that point and calculate how much work (electrical potential energy)done.

The electric potential due to any value of charge at infinity is zero units.

Electric potential due to a point charge

Electric potential of a point charge is V=kQ/r .

K = constant=9x〖10〗^9 N M 2C -2

Q = Charge

r= distance of point where electric potention is to determine.

Relation of sides with trigonomatrical functions

sine of α (sinα)= perpendicular / hypotenuse = AB/AC

cosine of α (cosα)= base / hypotenuse = BC/AC

tangent of α (tanα)= perpendicular / base = AB/BC

cosecant of α (cosecα)= hypotenuse / perpendicular = AC/AB

secant of α (secα) = hypothenuse / base = AC/BC

cotangent of α (cotα)= base / perpendicular = BC/AB

Question 1:

Answer:

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Explanation: