Electrical Engineering - Voltage, Current and Resistance - Discussion
Discussion Forum : Voltage, Current and Resistance - General Questions (Q.No. 4)
4.
The minimum resistance value for a blue, gray, red, silver resistor is
612 
6,120
6,800
6,460
Answer: Option
Explanation:
Because of 10% tolerance(last color silver), this resistance may vary 10% of 6800.
Minimum resistance value = 6800 - 680 = 6120
Maximum resistance value = 6800 + 680 = 7480
Discussion:
23 comments Page 2 of 3.
Amit said:
1 decade ago
What is the current of an 208V, 111kW three-phase load with cosFI=0.99 ?
Haneef said:
1 decade ago
Blue, gray, red, silver.
68*10^2 (-10%).
Tolerance is minimum so substrata if max add.
So, (6800/100) *10=680.
6800-680=6120.
68*10^2 (-10%).
Tolerance is minimum so substrata if max add.
So, (6800/100) *10=680.
6800-680=6120.
Sandy said:
1 decade ago
6120 is the correct answer due to the tolerance of the 10% (silver colour) in the resistance value thus as per general calculation 6800.
But 10% of 6800 is 680 thus answer may.
6120 or 7480, here the option available is 6120 thus the answer is 6120.
But 10% of 6800 is 680 thus answer may.
6120 or 7480, here the option available is 6120 thus the answer is 6120.
Suraj said:
1 decade ago
Answer is wrong.Correct answer is 6800
Ranjeet kr singh said:
1 decade ago
As per colour code
blue grey red silver
6 8 * 10^2 - 10%
so 6800-(6800*10%)
= 6800-680 = 6120 ans.
blue grey red silver
6 8 * 10^2 - 10%
so 6800-(6800*10%)
= 6800-680 = 6120 ans.
Premshankar behera said:
1 decade ago
Due to tolerance of 10%, 6800+/-10/100*6800 = 6000 to7600. So according to above mentioned answer 6120 is the lowest value.
Hence answer is 6120.
Hence answer is 6120.
NIBEDITA said:
1 decade ago
B is right
Kalaimani said:
1 decade ago
Ans is "B", because question is minimum resistance value of given color code so it will be ans is "B"
Kalaimani said:
1 decade ago
blue-6
grey-8
red-2
so value is 6800ohms
tolerance +-10%
therefore minimum resistance value is
6800/100*10=680
6800-680=6120ohms
so ans is "B"
grey-8
red-2
so value is 6800ohms
tolerance +-10%
therefore minimum resistance value is
6800/100*10=680
6800-680=6120ohms
so ans is "B"
ARAMUTHAN said:
1 decade ago
Answer is wrong . The Answer is
Blue = 6
Grey = 8
Red = 2
So 6800 Ohms or 6.8k Ohms
Silver is tolerance
Blue = 6
Grey = 8
Red = 2
So 6800 Ohms or 6.8k Ohms
Silver is tolerance
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