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This post will show you some important definitions in electronics and electrical. So, let’s get started.

Mass

The matter possessed by a body is called as mass. It is denoted by “m” and its unit is kilograms (kg).

Velocity

The velocity of a body is defined as the distance traveled by it in unit time. It is denoted by “v” and measured in meter/second.

Acceleration

Acceleration is defined as the rate of change of velocity. Its unit is meter/sec2.

Force

Force is defined as the push and pull required to change the state of rest or state of uniform motion of a body. The unit of force is Newton. Mathematically force is equal to the product of mass and acceleration. It is denoted by F.

؞ F = m x a Newton

Thus, 1-Newton force is defined as the force required accelerating a mass of 1 kg by 1m/s2.

Weight

Weight is defined as the product of mass and gravitational acceleration. It is denoted by W.

؞ Weight W = m x g

Where g = gravitational acceleration = 9.81 m/s2.

Torque

Torque is equal to the product of force and the perpendicular distance between the lines of action of force and the axis of rotation.

؞ Torque T = F x r

؞ F = Force and r = Radial distance

Work

When a Force F acts on a particle, the particle, then the particle moves through a distance d. in this situation the work is said to be done and it is defined as the product of force and displacement.

؞ Work done (W) = Force (F) x Displacement (d)

The work done is measured in Newton-meter or Joules, and it is denoted by W.

Power

The power is defined as the rate of work done with respect to time.

؞ Power = Work done/Time

The power is measured in joules/sec. or newton-meter/sec. or watt.

This post will show you some important definitions in electronics and electrical. So, let’s get started.

Mass

The matter possessed by a body is called as mass. It is denoted by “m” and its unit is kilograms (kg).

Velocity

The velocity of a body is defined as the distance traveled by it in unit time. It is denoted by “v” and measured in meter/second.

Acceleration

Acceleration is defined as the rate of change of velocity. Its unit is meter/sec2.

Force

Force is defined as the push and pull required to change the state of rest or state of uniform motion of a body. The unit of force is Newton. Mathematically force is equal to the product of mass and acceleration. It is denoted by F.

؞ F = m x a Newton

Thus, 1-Newton force is defined as the force required accelerating a mass of 1 kg by 1m/s2.

Weight

Weight is defined as the product of mass and gravitational acceleration. It is denoted by W.

؞ Weight W = m x g

Where g = gravitational acceleration = 9.81 m/s2.

Torque

Torque is equal to the product of force and the perpendicular distance between the lines of action of force and the axis of rotation.

؞ Torque T = F x r

؞ F = Force and r = Radial distance

Work

When a Force F acts on a particle, the particle, then the particle moves through a distance d. in this situation the work is said to be done and it is defined as the product of force and displacement.

؞ Work done (W) = Force (F) x Displacement (d)

The work done is measured in Newton-meter or Joules, and it is denoted by W.

Power

The power is defined as the rate of work done with respect to time.

؞ Power = Work done/Time

The power is measured in joules/sec. or newton-meter/sec. or watt.

Energy

The energy is defined as the capacity to do work. The energy is measured in joules. The energy is of two forms:

1. Kinetic energy
2. Potential energy

Kinetic Energy

Kinetic energy is defined as the energy possessed by the body due to its motion. If a body of mass “m” is moving at a velocity “v” possesses the kinetic energy given by,

Kinetic energy = ½ mv2 joules

Potential energy

Potential energy is the energy possessed by a body due to its position. When a body of mass “m” is lifted vertically through a height of “h” like following fig., then the corresponding potential energy is given by,

Potential energy = m x g x h

= W x h Joules

Where W= Weight of the body, g = Gravitational force

The relation between power and energy is given by.

Energy = Power x Time = Work Done