Electrical Engineering - Voltage, Current and Resistance - Discussion

B B R O Y G B V G W

Memorize this colors by the slogan "B B ROY Go to Bombay Via Gate Way of india" and remember the Capital Letters only.

Now Starting from first number them starting with 0.
So Black = 0
Brown= 1
Red = 2
Orange = 3
And so on.
Remember that there are four B in this equation and their order is Black Brown And Blue.


=> Now the first color of the Resistor is The decimal point.
In our CASE it is Blue so it is = 60(Decimal point)

=> Second one is the Unit point.
In our CASE it is Grey so it is = 08(Unit point)
Adding that two is now =68

=> Third on is the power of 10 and multiply it with the combination of decimal and unit point figure.
In our CASE it is Red so it is = 2 Hence it is equal to 10 rest to 2 = 10 ^ 2.
So now the Resistance will be 68 * 10 ^ 2 = 6800 Ohms

=> Now the Last color code is the tolerance hence it is to be introduced in Either in + or in - Formate with the percentage.
There are only 3 possible ways for tolerance.
Gold = +- 5%;
Silver = +- 10%
None = +- 20 %

In Our Case it is Silver so it is = +- 10 %

Finally we got the Resistance value for the given color code is
= 6800 +- 10 %

=> For minimum value substract the 10% of 6800 and or for the maximum value add the 10 % of 6800.

In our CASE it is Minimum so 68000 - 10 % of 68000
= 6800 - 0680
= 6120 ohms

Ans= B

Thanks, @Prashanth bro for your deep explanation it's better than any other tutor.

Blue-grey-red-silver,

68*10^2 (-10% tolerance).
6800-(6800*10%).
= 6800 - 680.
= 6120.

Answer is B.

I agree that, 6120 is the right answer.

YES ANS B, & thanks to PRASHANT

Yeah B s correct. As silver has 10% tolerance.

What will be the answer if they not ask silver?

Thanks for all the given explanation.

I agree with the given answer, i.e. option b.

Ya this question all right.

The answer is = 6120 is to be correct.