Skip to main content

Ohm's law simple learning BY Yuvi - Study Point

Hey guys, have you ever heard about Ohm's law, ok so I will teach you in an easy way. So let's get started.
  • It is the basic rule of electricity and it explains the relationship between voltage, electric current & resistance.
  • Ohm's law states that the electric current which is flowing through a circuit or conductor is directly proportional to the voltage and inversely proportional to the resistance.
  • In other words, if resistance is not changed then the electric current flowing through a conductor will increase with the increase in voltage.
  • And if the voltage is not changed then the electric current which is flowing through a conductor decreases with the increase in resistance.   
Ohm's law formulas,

V = I * R
R = V / I
I = V / R
Ohm's law states that Resistance (R) of the conductor is constant.
[*Note = But research shows that the resistance is directly proportional to the length of the conductor and inversely proportional to the cross-section area of the conductor.] 
  • Here, V = voltage applied to a circuit or a conductor, 
R = resistance of the conductor,
I = current flowing through the circuit or conductor.

  • In other words, the current passing through a material or a conductor or a circuit is directly proportional to the potential difference or the voltage across the two points. 
  • Ohm's law is applied only at a constant temperature. If the temperature is not constant then the statement of the ohm's law becomes wrong.
  • As constant temperature makes the resistivity constant which makes the resistance constant. 


  {In this lecture video I have given the brief explanation about Ohm's law}


Comments

Post a Comment

Popular posts from this blog

NBFM & WBFM (Narrow band frequency modulation & Wide band frequency modulation) simple explanation. By Yuvi - Study Point

Hey everyone, today we are going to learn about NBFM & WBFM (Narrowband frequency modulation & Wideband frequency modulation) in simple or easy way. So, without wasting any time lets get started. The information about NBFM & WBFM When the spectrum's efficiency is important or it is required then we use NBFM (Narrowband frequency modulation) is used.  But when better signal quality is required or when it is important then we use WBFM (Wideband frequency modulation). The term NBFM is used for those applications where the modulation index is less than or equal to 1. And the term WBFM is used for those applications where the modulation index is greater than or equal to 1. Now, let's see more difference between Narrow band frequency modulation(NBFM) and Wideband frequency modulation(WBFM). The term narrow-band and wide-band refer to the actual radio channel bandwidth. The purpose or advantage of using NBFM (Narrowband frequency modulation) The purpo...
2 comments
Read more

Corona effect in transmission lines.| Explanation by Yuvi - Study Point

You all have heard about the Corona effect in transmission lines, now understand it in a simple way. This effect is a phenomenon which is associated with all transmission lines. At certain conditions, the electric field closer or near the energized conductors or components produces a tiny electric discharge or we can say corona which causes the surrounding air to ionize. And due to this ionization of surrounding air molecules of conductors, a luminous glow with hissing noise is produced which is known as Corona effect. Between the transmission lines, air act as a dielectric medium or we can say that air act as an insulator between current-carrying conductors. Between the conductors, voltage induces and if this voltage is of alternating nature then charging current will flow between the conductors. And the voltage of this transmission line and electric field intensity increases because of this charging conductor. There is a predetermined value of the electric field inten...
Post a Comment
Read more

Difference between Alternator and Generator. By Yuvi - Study Point

Hey everyone, today we are going to see the simple difference between Alternator and Generator. So, without wasting any time lets get started. Alternator   An alternator is a machine that converts mechanical energy from a prime mover into the A.C electrical power at a specific frequency and voltage. Alternator induces an alternating current. The input supply in the alternator is taken from the stator.  The alternator has a variable output e.m.f. The alternator is smaller in size as compared to the generator and that's why it requires less space as compared to the generator. The output of the alternator is higher than the generator. The alternator has a wide range of rotation per minute (RPM). The armature of an alternator is stationary which means in an alternator, electricity is produced when the magnetic field spins inside the stator (winding of wire).    The alternator has a rotating magnetic field. A dead battery is can't be charged by an alterna...
Post a Comment
Read more