18/5/2018 Electricity

Voltage

newton - The newton (symbol: N) is the International System of Units (SI) derived unit of force. One newton is the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in direction of the applied force.

F = m ⋅ a
1N = 1 kg ⋅ 1 m/s2

Joule - is a derived unit of energy.  It is equal to the energy transferred to (or work done on) an object when a force of one newton acts on that object in the direction of its motion through a distance of one metre

Watt - a unit of power. It is defined as a derived unit of 1 joule per second,[1] and is used to quantify the rate of energy transfer.

Ohm's law -  states that the current through a conductor between two points is directly proportional to the voltage across the two points.

I = V / R

dBm - unit of level used to indicate that a power ratio is expressed in decibels (dB) with reference to one milliwatt (mW)

Rectifier -  is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction.

AC (Alternating Current)

DC (Direct Current)