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Thursday 28 November 2013

Q.No.13.3: - What are the resistances of the resistors given in the figure A and B? What is the tolerance of each? Explain what is meant by tolerance?

Q.No.13.3: - What are the resistances of the resistors given in the figure A and B? What is the tolerance of each? Explain what is meant by tolerance?
(Sorry for Diagram but I’m trying to describe this figure here)
1st band is Brown 2nd is Green 3rd is Red 4th is Gold. In B fig. 1st band is Yellow 2nd is White 3rd is Orange and 4th is Silver.
Ans: - For Figure A
First band brown   =        1
            Second band Green =     5
             Third band Red (have number two so)= 00
             Now,       R   =   1500Ω
             Fourth band Gold which shows tolerance = ±5%
So,                       R   =   1500Ω±5%
For Figure B
                    First Band Yellow  =        4
                    Second band White=        9
                    Third band orange =        000 (no. of zeros)
                              R     =     49000 Ω
                    Fourth band silver =        ±10%
Now resistance is
                              R     =     49000±10% Ω
Tolerance: -

       Tolerance means the possible variation from the marked value.

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