resistor color code calculator_

Graphical Resistor Calculator

Graphical Resistor Calculator is a Free Software to easily calculate the resistance of registers from the band colors.
Simply change the values from the dropdown menus.

Band 1	Band 2	Band 3		Band 4
Value 1 (MSV)	Value 2	Weight		Tolerance
Black (0) Brown (1) Red (2) Orange (3) Yellow (4) Green (5) Blue (6) Violet (7) Gray (8) White (9)	Black (0) Brown (1) Red (2) Orange (3) Yellow (4) Green (5) Blue (6) Violet (7) Gray (8) White (9)	Black (1) Brown (10) Red (100) Orange (1k) Yellow (10k) Green (100k) Blue (1M) Violet (10M) Gray (100M) White (1G)		Gold (± 5%) Silver (± 10%)
Resistance:		1,000 Ω ±5%

Graphical Resistor Calculator Reference Chart

Standard Table For Calculating 4 Band Resistors' Resistance.

Color	Digit value	Multiplier	Multiplied Out	Tolerance
Black	0	100	1
Brown	1	101	10
Red	2	102	100
Orange	3	103	1,000
Yellow	4	104	10000
Green	5	105	100,000
Blue	6	106	1,000,000
Violet	7	107	10,000,000
Gray	8	108	100,000,000
White	9	109	1,000,000,000
Gold				±5%
Silver				±10%

ohm's law calculator

Enter two known values and press Solve to calculate unknowns.
Volts (Volts)	Resistance (Ohms)	Current (Amps)	Power (Watts)

What is ohm's law?

  What is Ohms law? 

The relationship between Voltage, Current and Resistance in any DC electrical circuit
was explained by the German physicist Georg Ohm, (1787 - 1854). Georg Ohm found that, at
a constant temperature, the electrical current flowing through a fixed linear resistance is
directly proportional to the voltage applied across it, and also inversely proportional to the
resistance.
Statement:
It states that the current ‘I’ flowing in a circuit is directly proportional to the applied
voltage ‘V’ and inversely proportional to the resistance ‘R’, provided the temperature remains
constant.
Thus, I α V
                      V
Current ∶ I = ____
                       R

 Voltage ∶ V = I. R

                                V
Resistance ∶ R = _____
                                 I

According to Ohm′
s Law ∶
 Power ∶ P = Voltage x Current
 P = V x I ------- (1)
 Subsitute, V = I. R in equation (1)
 P = I. R x I
 P = I 2R
                         V
Substitue, I = ___ in equation (1)
                         R

P = V. V
     _____
        R
P = V2
     ____
       R
According to Ohm′
s Law ∶
 Energy ∶ E = Voltage x Current x Time
 E = V x I x t ------- (1)
 Subsitute, V = I. R in equation (1)
 E = I. R x I x t
 E = I 2R t
                          V
Substitue, I = ____ in equation (1) 
                           R


           V
E = V. ___.t
            R

       V2t
E = _____
          R

What is Coulomb’s law of electrostatics?

What is Coulomb’s law of electrostatics? 

First Law: 

Like charges of electricity repel each
other and unlike charges attract each
other.

Second law:

The force (F) exists between two
point-source charges (Q1 and Q2) is
directly
proportional to the product of the
two charges and is inversely
proportional to the square of the
distance (d) between the charges.

1.10 Capacitance:

The amount of charge that a capacitor
can store per unit of voltage across its
plates is
its capacitance. It is represented by C.
The capacitance is a measure of a
capacitor’s ability to store charge.
Farad is the unit of capacitance.
One farad is the amount of
capacitance when one coulomb of
charge is stored with
one volt across the plates.
F α Q1 Q2
d2
F = k.Q1 Q2d2 Constant,      k = 14πεoε
r
   Where, F = Force between the
charges (N)
Q1 and Q2 = Magnitude of two charges
in coulomb
F = Force between the charges (N) d =
distance between the charges (m) εo  =
Permittivity of the free space
In S.I:        εo  = 8.854x 10−12 farad/
metre
εr = relative permittivity of the medium
εr = 1 for vacuum or air
   Therefore,    Force:     F = Q1 Q24πεoε
rd2
F = Q1 Q24π x 8.854x 10−12  x εrd2 F =
9 x 109x Q1 Q2
εrd2         ; for a medium
F = 9 x 109x Q1 Q2d2         ; for air