Voltage divider formula

Electrical voltage is an energy which required moving a unit charge through an element. Voltage calculation is in volts (v). Voltage resistor is voltmeter, so it is voltage drop calculator. Electricity voltage is known as electromotive force also, shortly emf. Italian physicist Alessandro Antonio Volta invented voltaic battery. If we move a unit of charge from a to b then it represents mathematically

Here w is energy in Joules (J) and q is charge which is in coulombs (C).
So, 1 volt = 1joul / coulomb
= 1 newton-meter/coulomb

In a circuit voltage makes circuit go. Measuring voltage in a circuit we use two points in parallel. We measure the voltage drop calculation or voltage difference between two points. Sometimes we get voltage difference with respect to ground. Along any wire or good conductor voltage is constant. Voltage drops occur when it is passed by any components like resistor.

Consider a single loop circuit has three resistors are in series. Since the same current i flow in both of them. Applying Ohm’s law we get

V1 = iR1,
V2 = iR2,
V3 = iR3.

Now applying KVL to the loop with clockwise direction,

- v + v1 + v2 + v3 = 0
or v = v1 + v2 + v3
= iR1 + iR2 + iR3
= i (R1 + R2 + R3)