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Important Definitions and Formulas in Electronics and Electrical
Important Definitions and Formulas in Electronics and Electrical

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

potential energy explained
potential energy explained

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