Skip to main content

Potential Divider

Potential Divider

Potential divider is also known as voltage divider.
Its purpose is to be used to obtain any desired( wanted/preferred) smaller portion of voltage from a single source, VT.

i.e. sometimes we want to use only part of the voltage provided by a battery and in order to get this, we use a potential divider circuit.

Potential divider consists of 2 resistors that are connected to a voltage source.

Diagram 1: Potential Divider 

The basic principle of a potential divider circuit is that the resistors in the circuit act as the divider. The value of the resistance of each resistor  will influence the value of the voltage.

Example/Application in real life:

The rotary type of potentiometer.
(1) We control the volume of the radio by twisting its knob.
(2) We control the fan speed by twisting the 1-2-3-4-5 knob.

Is not it??
So, what we are doing (example 1 & 2) here is we actually controlling the resistance, resulting in the voltage portion.


Thank you,
Mdm Ummi Atiah KMPk


~ May it Benefits You ➽💕

Comments

Post a Comment

Popular posts from this blog

Root Mean Square Current (I rms)

Root Mean Square Current As mentioned in the previous post , the value of AC is always changing. Then, how do we measure its value??? We could not use the maximum value of the current Io, because it only occurs at a moment. The average current is ZERO . Hence, one effective value that we could use the root mean square value. Irms . The formula for   Irms is given by: where Io is maximum current. Irms is the value that is equivalent to a steady direct current .  We can investigate this by comparing 2 circuits containing lamp each. circuit 1 uses battery as the source, while circuit 2 uses a.c. supply. AC supply is adjusted so that both lamps are equally bright. At this point, DC and AC supplies are transferring energy to the lamps at the same rate (Power).  By equating the Power of both circuits, we can deduce the equation of  Irms as above. Therefore, the d.c. voltage equals the r.m.s. value of the a.c. voltage.  From the the graph below and th...

Augmented Reality (AR)

Augmented Reality (AR) Looking at a picture of an object is our smartphones that seems rising (like the pictures below) and able to be rotated three sixty degree is interesting , isn't it?  To have this, it require a technology that is called as augmented reality (AR). 'augment' means to increase or to add to the existing reality. AR basically a technology that superimposes an image that is generated from computer on the view of the real world, then producing a composite view. It is kind of an interactive digital experience of the real object that is being 'augmented'. AR is used in smartphones apps which employ the phone's camera in order to show the real world in front of us. If you ever heard or play POKEMON GO, you had actually came across the AR. AR is something like we give a life to a non-living object. The other famous example of AR application is the IKEA apps. By using this app, customers are able to select their desired furniture the...

Charging a capacitor

As we know, the capacitor is a place where electrical charges (positive and negative) are stored. hence, we have to understand that a capacitor will undergoes the process of CHARGING and DISCHARGING. Once it stores the electrical chargers (and energy) , they need to be charged up and to release the stored energy for particular use, the capacitor is discharged. CHARGING PROCESS HOW A CAPACITOR IS CHARGED? Figure 1: Charging the capacitor When the switch is closed like in a figure above, when the circuit is on the electrons will flow from negative terminal of the battery.  they go to the nearest plate that is plate A . At the same time, the original electrons at plate B will flow to the positive terminal of the battery, leaving positive charges at the this plate.  This process are collecting electrons at plate A and positive charges at plate B . The flow of electrons stop when the potential, V between the plates (due to the existence of positive & negat...