Electrical Engineering - Ohm's Law - Discussion

Discussion :: Ohm's Law - General Questions (Q.No.4)

4. 

A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange, orange, silver?

[A]. 2 mA
[B]. 2.2 mA
[C]. 214 mA
[D]. 21.4 mA

Answer: Option B

Explanation:

No answer description available for this question.

K.Rekha said: (Nov 8, 2010)  
The current in the resistor if the color code is red, orange, orange, silver why?

Priyaaru said: (Dec 7, 2010)  
resistance = 23* (10)^3 (+ or -)10 = 23010 or 22990
current = ( voltage / resistance)= (50 / 23010)= 2.2 mA

Tushar Singhal said: (Dec 30, 2010)  
I'm not satisfy with priyaaru ans. because 23*(10)^3(+or-)10% means 23000(+or-)10% means 23000(+or-)2300.

Alok Kumar said: (Jan 18, 2011)  
Can anybody understand me about colour code?! please.

Sathish said: (Feb 6, 2011)  
Colour code is like BBROYGBVGW

We used say as: BB Roy Great Britain Very Good Wife

Black 0 1 1
Brown 1 1 1 10
Red 2 2 2 100
Orange 3 3 3 1,000
Yellow 4 4 4 10,000
Green 5 5 5 100,000
Blue 6 6 6 1,000,000
Violet 7 7 10,000,000
Gray 8 8 100,000,000
White 9 9 1,000,000,000
None 20%
Silver 10%
Gold 5%

SO RED is 2 orange 3 and third orange 10 to the power of that vlaue so 10000

so R=23000
I=V/R
=50/23000
=2.2mA

Vinay said: (Feb 23, 2011)  
That is very good explanation

Joy Jumbo Itah said: (Apr 14, 2011)  
I understand better now.

Isocuraphil said: (Apr 22, 2011)  
Please help me on how to memorize color code values and multiplier. Thanx.

Aniruddha said: (May 5, 2011)  
Thanks Suresh & Satish for make me clear about colour coding. But second orange code is nt clear easyly. Please clear my dout.

Thenmozhi said: (May 19, 2011)  
THANKS...... Now i'm very clear with the colour codes....

Lavanya said: (Jun 19, 2011)  
Resistor values can be known by colour band.
0 black
1 blue
2 red
3 orange
4 yellow
5 green
6 blue
7 violet
8 grey
9 white

Resistor value is given by 1st 3 bands.
Start from left most band,3rd value is a power of 10..
Ans: red(2),orange(3),orange(10^3).. so value becoms 23*10^3

Veena said: (Jul 8, 2011)  
What about the colour code silver? please give me explanation.

S.Gobimohanraj said: (Jul 11, 2011)  
In resistor the first color mean the value first digit that
Red - 2
Orange also mean the value,
Orange - 3
but that next on Orange mean the power of 10
Orange - 10^3
that color code silver mean that with stand power of resistor +/- 10%.
u can take another one Example like
"brown Red Yellow silver" mean the resistor value is
Brown - 1
Red - 2
Yellow - 10^4
silver - +/- 10%
the Resistor value = 120 kilo ohms.

Anand said: (Jul 22, 2011)  
Red-3,orange-4,orange-4,silver=10% of Resistance color code,
344/10=34.4,
According to ohm's law I=V/R=50/34.4=2.2

Rajesh Kumar said: (Sep 24, 2011)  
Memorizing line is

"BBROY went to Great Britain to get Very Good Wife with Gold and Silver".

Capital letters represent color codes in sequence!

Vinay said: (Oct 15, 2011)  
"BBROY went to Great Britain to get Very Good Wife with Gold and Silver" ya its crct memorize it its also find out by ulta alta method like

red col-our code is 2 and orange colour code is 3 so (5\23) u will get ans 0.217 u get ans 2.2 like that k guys

Meena said: (Dec 25, 2011)  
"BBROY of Great Britain had a Very Good Wife with Gold and Silver"

Black 0
Brown 1
Red 2
Orange 3
Yellow 4
Green 5
Blue 6
Violet 7
Grey 8
White 9

First color = digit
Second color=digit
Third color= power of ten
Fourth colour =tolerance
Tolerance values are :
Brown 1
Red 2
Orange 3
Yellow 4
Gold 5
Silver 10
None 20

Sravan said: (Jan 24, 2012)  
Can you tell me the answer for 5 coloured resistor i.e. red, yellow, grey, blue, voilet?

Mahesh Babu.T said: (Feb 24, 2012)  
Remember the coding
B B R O Y G B V G W _ For short cut BBROY GREAT BRITAN VERY GOOD WIFE
0 1 2 3 4 5 6 7 8 9

B-Black-0
B-Brown-1
R-Red- 2
O-Orange-3
Y-Yellow-4
G-green-5
B-Blue- 6
V-Violet-7
G-Green-8
W-White-9
Silver--- 10%
Gold --- 20%


For Example He given blue, red,green ,gold
then solution to resistor becomes
Blue -6
Red-- 2
green-8
gold 20%

First write two colour codes side to side
then for third color code it will be power of 10
then for 20%(if gold) multiply it with 20/100

62*(10^8)*(20/100)

in this example R=1240000000



For Above problem

23*(10^3)*(10/100)
R =2300

Ramu said: (Mar 15, 2012)  
B-Black-0
B-Brown-1
R-Red- 2
O-Orange-3
Y-Yellow-4
G-green-5
B-Blue- 6
V-Violet-7
G-Green-8
W-White-9
Silver--- 10%
Gold --- 20%
RESISTOR color code same as-above "Big Boys Race our Young girls But Violet Generally wins"

Gaurav said: (Mar 19, 2012)  
U can understand it fom dis tagline
BB ROY GREAT BRITAIN VERY GOOG WIFe
So WE HAVE
B=BLACK 0
B=BROWN 1
R=RED 2
O=ORANGE 3
Y=YELLOW 4
G=GREEN 5
B=BLUE 6
V=VOPLET 7
G=GRAY 8
W=WHITE 9
SILVER= +/-10%
GOLD +/-5%

Rathi said: (Apr 17, 2012)  
We can get Resistance value from the color code (red, orange, orange, silver) is 23 (10^3) = 23000.

Here we are not consider the last color (tolerance-silver) , Because here not asking minimum or maximum current.

So current I = V/R = 50/23000 = 0.00217 = 2.2mA.

Yogeswaran said: (Apr 21, 2012)  
Here we can easyly memorize the colour code by using following sentence:.

B B ROY GREAT BRITAN VERY GOOD WIFE (silver, gold colours are no need to memorize, because first three colours enough to calculate value of resister).

Rajpriya said: (Jun 1, 2012)  
B-Black-0
B-Brown-1
R-Red- 2
O-Orange-3
Y-Yellow-4
G-green-5
B-Blue- 6
V-Violet-7
G-Green-8
W-White-9
Silver--- 10%
Gold --- 20%

Lakshmi said: (Jun 21, 2012)  
Givent that data:
voltage source=50 V
we have to find out the resistance value:
according to COLOR CODING FOR RESISTORS
B B R O Y G B V G W
=> VALUES ARE 0 1 2 3 4 5 6 7 8 9
=> first 2 values are same but 3rd valus is multiple of 10 and lost word specifies the tolerance value.
i.e R=red orange orange silver(10%)
2 3 3
so, R=23*10^3
=> I=V/R
=50/23*10^3
=2.17mA
=2.2mA

Brian De Vera Stl said: (Dec 9, 2012)  
(Color) 1st and 2nd Significant Multiplier

B - black - 0 1 1
B - boys - 1 10 10
R - rape - 2 100 100
O - our - 3 1000 1K
Y - young - 4 10000 10K
G - girl - 5 100000 100K
B - but - 6 1000000 1M
V - violeta - 7 10000000 10M
G - give - 8 100000000 100M
W - willingly - 9 1000000000 1T
Silver- - - - - 10% <---- Tolerance
Gold- - - - - - 20% <---- Tolerance

James said: (Jan 23, 2013)  
We have to add the tolerance or subtract?

Anyone please?

Himabindu said: (Jul 3, 2013)  
If min or max. Current is not mentioned in the question. Last color is not considered. Is that right or not? please help me guys.

Pooja said: (Jul 19, 2013)  
Thanks @Satish I m very clear colour code good explanation I understand better now but last orange not proper clear so please clear me last doubt.

Upendra Kumar Sahu said: (Feb 4, 2014)  
Total resistance = 23000+/- 10%.
Voltage = 50.

Then I = V/R.
= 50/23000.
= 0.00217A .

= 0.00217*1000(due to we need mA) = 2.173 or 2.2mA (answer).

Prashant Singh said: (Mar 5, 2014)  
Easy to remember color codes BBROY GB VG W.

Let us consider BBROY as name and GB as gigabyte VG as very good AND W as last letter in English alphabetical is W (app.).

Ananda Kumar said: (Mar 6, 2014)  
B-Black 0 10^0
B-Brown 1 10^1
R-Red 2 10^2
O-Orange 3 10^3
Y-Yellow 4 10^4
G-green 5 10^5
B-Blue 6 10^6
V-Violet 7 10^7
G-Green 8 10^8
W-White 9 10^9
Silver 10% _
Gold 20% _

For colour coding, just consider first 3 colours alone. In this problem they given red, orange, orange and silver. You take first 3 colours r,o,o. Take first 2 colours.
For red - 2.
For orange - 3.
For 3rd colour take 10^x. For our problem orange has given..
So Orange - 10^3.
So Find R = 23*10^3.

V = 50.
I = V/R = 50/(23*10^3) = 0.002173A = 2.2mA.

Answer = 2.2mA.

Vijay said: (Aug 3, 2014)  
Can anyone explain where use tolerance means 10% in red orange orange and silver.

Rukus said: (Aug 24, 2014)  
Color code:
"Bad Boys Race Our Young Girls But Violet Generally Wins".

Black 0.
Brown 1.
Red 2.
Orange 3.
Yellow 4.
Green 5.
Blue 6.
Violet 7.
Grey 8.
White 9.

Tolerances,
~ no color = +/- 20%.
~ Silver = +/- 10%.
~ Gold = +/- 5%.

Is this not correct? Some of you have Gold at 20% and that is incorrect from my understanding.

B.Mahesh said: (Aug 26, 2014)  
41mA by taking silver as 10%. But they took 1%. Hence they got 2.2mA.

Rahul said: (Feb 18, 2015)  
Clear about value of GREEN its 8 or 5?

Jaga said: (Apr 18, 2015)  
Color code of resistance:

Red = 2.
Orange = 3,

So I = v/r = 50/23 k = 2.17 m = 2.2 m.

Md Sadruddin Ansari said: (May 8, 2015)  
First Band, Red = 2.

Second Band, Orange = 3.

Multiplier Band, Orange = 10^3.

Tolerance Band, Silver = +or-10%.

Equation: 23*10^3 +or-10%.

I = V/R.

= 50/23*10^3.
= 50*10^-3/23.

=2.17*10^-3 A.
=2.2 mA.

Sangmesh Biradar said: (May 28, 2015)  
Thanks all for understanding color code.

Shantu said: (Jul 13, 2015)  
All color code understand thanks for all of you.

Barnali said: (Jul 27, 2015)  
Color bands for 1.5 Ohm resistor will be?

Abhishek John said: (Aug 6, 2015)  
First Band Red = 2.

Second Band Orange = 3.

(Repeat) Multiplier Band Orange = 10*^3 or 1000.

Silver = +/-10%.

Total = 23000*(+/-10%).

I = V/R.

I = 50/23000A.
I = 0.00217A.
I = 2.17mA - Answer.

Or 2.2mA.

Shruthi said: (Sep 8, 2015)  
V=50 V, I=?

R = red, orange, orange, silver i.e. 23x10^3 = 23 k.

I = V/R.

= 50/23000.

= 2.17 mA.

Goutham said: (Dec 16, 2015)  
Thank you very much guys for making me to understand.

Rakesh said: (Jan 21, 2016)  
Without calculator, how it's calculated?

Akriti said: (Mar 23, 2016)  
CLEAR VALUE OF GOLD IS 5% OR 20%.

Awais said: (Mar 27, 2016)  
It is 5% of Gold and 20% of None.

Maneesh Mahajan said: (Apr 8, 2016)  
Very nice explanation. I am satisfied. Thank you all.

Javaria said: (Apr 22, 2016)  
Marvelous explanation. I am really much satisfied from this explanation. Thank you to all.

Mahesh Kumar K said: (May 11, 2016)  
Good explanation. Thanking you all.

I want to know easy method to remember the colour coding. Can anyone help me?

Elsadig said: (May 19, 2016)  
Good job.

But I still have the question.

Green = 5.
Green = 8.

Which is right and why we use 2 values?

Jayesh J. Joshi said: (Jun 16, 2016)  
Keep this as "BBROY went to Great Britain to get Very Good Wife with Gold and Silver".

Resistor values can be known by the colour band.
0 black
1 blue
2 red
3 orange
4 yellow
5 green
6 blue
7 violet
8 grey
9 white

The resistor value is given by 1st 3 bands.
Start from left most band, 3rd value is a power of 10.

Ans: red(2), orange(3), orange(10^3).
So, the value becomes 23 * 10^3.

Sks said: (Sep 27, 2016)  
If resistor will contain 5 color bands then how can we able to determine it's value?

Prakash Pritam said: (Oct 4, 2016)  
I think in this question we are assuming the minimum value of resistance, Hence the value of resistance is 23 * 10^3 - 10% = 22.7 * 10^3,
Now, V/R = I,
=> 50/22.7 * 10^3 = 2.20 mA.

Kuldeep said: (Oct 14, 2016)  
23 * 10^3 (this is for red, orange, orange) then what about silver?

Shujaa said: (Oct 15, 2016)  
Thanks for all the explanation, now I understand this problem.

Imrosekhan said: (Nov 16, 2016)  
Colour code is like BBROYGBVGW.

We used say as: BB Roy Great Britain Very Good Wife

Black---> 0 1 1
Brown---> 1 1 1 10
Red ---> 2 2 2 100
Orange -->3 3 3 1,000
Yellow---> 4 4 4 10,000
Green---> 5 5 5 100,000
Blue ---> 6 6 6 1,000,000
Violet---> 7 7 10,000,000
Gray ---> 8 8 100,000,000
White --->9 9 1,000,000,000
None--->20%
Silver--->10%
Gold--->5%

SO RED is 2 orange 3 and third orange 10 to the power of that value so 10000.

So R = 23000.
as we know that v = IR.
I = V/R.
= 50/23000,
= 2.2mA.

Saurabh said: (Dec 15, 2016)  
Very well explained, thanks @Sathish.

Rahul said: (Jan 20, 2017)  
Which is the correct value of gold 20% or 5%?

Please clear it.

Nandipha said: (Mar 15, 2017)  
What is the resistor of Orange, violet, yellow, gold, brown?

Shruthi Gopalan said: (Apr 22, 2017)  
According to ohms law, I = V/R.

Given :

V = 50v.
R = red ,orange,orange,silver = 23 X 10^3 with 10% tolerance.
So, I = V/R = 50 /(23x10^3) = 2.2mA.

Abhinandan Asd said: (May 10, 2017)  
@Satish and @Lavanya.

You both give an exact & clear solution. Thanks.

Akki said: (Jul 24, 2017)  
Thanks to everyone for your help to find the solution.

Muskan said: (Jul 27, 2017)  
Thanks all for explaining it.

Satheesh said: (Aug 19, 2017)  
Thanks for all the given explaining.

Naza Tana said: (Oct 20, 2017)  
What if it is gold 5% then how would be the answer?

Kareem said: (Dec 11, 2017)  
Thank you all for the given explanation.

Vanita M K said: (Mar 31, 2018)  
What about 5 colors resistor for example: red, Yello, grey, blue, violet?

Ans: 2486*10^7
Or
Ans: 248*10^6.

Please, anyone, explain.

Bibek said: (Apr 8, 2018)  
After calculating, I got the value of resistance 25300 max and 20700 min. So which value should I use for resistance- max or min? Please explain me.

Saran said: (May 16, 2018)  
How to assemble color codes values? Please explain.

Muthukomu said: (Jul 24, 2018)  
Use this code:

BBROYGBVGW.
0123456789.

Mehtab Satti said: (Sep 11, 2018)  
Why are we not including tolerance (silver, gold) in our calculations here? Please explain.

Muhammad Zulfiqar said: (May 14, 2019)  
Thanks all for explaining.

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