Electrical Engineering - Voltage, Current and Resistance - Discussion
Discussion Forum : Voltage, Current and Resistance - General Questions (Q.No. 5)
5.
The maximum resistance value for a brown, red, yellow, gold resistor is
126,000 
126,600
114,000
132,000
Discussion:
45 comments Page 2 of 5.
GIRIRAJ said:
1 decade ago
Formula for finding resistance is
for finding max value=(ABx10^C)+T%
for finding min value=(ABx10^C)-T%
where A= 1st band colour
B= 2nd band colour
C= 3rd band colour
T= 4th band colour (tolerance)
here in this question
Brown =1
red =2
yellow=4
Gold =5%
So acc... to formula
(ABx10^C)+T%
(12x10^4)+5%
we get 120000+((120000*5)/100)
So answer is 120000+6000 =126000 ohm
for finding max value=(ABx10^C)+T%
for finding min value=(ABx10^C)-T%
where A= 1st band colour
B= 2nd band colour
C= 3rd band colour
T= 4th band colour (tolerance)
here in this question
Brown =1
red =2
yellow=4
Gold =5%
So acc... to formula
(ABx10^C)+T%
(12x10^4)+5%
we get 120000+((120000*5)/100)
So answer is 120000+6000 =126000 ohm
(1)
Sukh said:
1 decade ago
120000*5/100=6000+120000=1260000
Rekha said:
1 decade ago
Why are the resistance have a colour code ?
Parveen said:
1 decade ago
Because we are not know the value of RES without multimeter or ohm meter so colour is best option.
Aditya yadav said:
1 decade ago
Please tell me about colour coding of resistances and how to calculate the values of RES ?
Pavani said:
1 decade ago
Answer is 126000.
Because,
Brown-1.
Red-2.
Yellow-4.
Gold-tolerance of 5%.
120000 + 5% = 126000.
Because,
Brown-1.
Red-2.
Yellow-4.
Gold-tolerance of 5%.
120000 + 5% = 126000.
MANJU said:
1 decade ago
Brown - 1.
Red - 2.
Yellow - 4.
Brown red yellow,
12*10^4=120000.
Tolerance 5%.
Tolerance 5*(120000/100)=6000.
So 120000+6000=126000.
Answer is 126000.
Red - 2.
Yellow - 4.
Brown red yellow,
12*10^4=120000.
Tolerance 5%.
Tolerance 5*(120000/100)=6000.
So 120000+6000=126000.
Answer is 126000.
Chandra kumar nayak said:
1 decade ago
I got answers 120000, by not adding +_ 5%. By adding 5% the answer is 126000.
Dalmar said:
1 decade ago
The right answer is 120000 Ohms + 6000 Ohms = 126000.
120000*.05 = 6000 the tolerance of gold.
120000*.05 = 6000 the tolerance of gold.
Rathi said:
1 decade ago
@Dalmar is Right.
Why we adding 6000?
Because they asking the maximum resistance value. So we should add the tolerance of gold for 120000(120000*.05 = 6000).
If they ask minimum value we need to subtract 6000 from 120000.
Why we adding 6000?
Because they asking the maximum resistance value. So we should add the tolerance of gold for 120000(120000*.05 = 6000).
If they ask minimum value we need to subtract 6000 from 120000.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers