Saved Bookmarks
| 1. |
A resistance R is to be measured using a meter bridge. Student chooses the standard resistance to be 100 Omega. He finds the null point at I_(1) = 2.9 cm He is told to attempt to improve the accuracy Which of the following is a useful way ? |
|
Answer» He should measure `I_(1)` more ACCURATELY. To decrease percentage ERROR in resistance R null point of meter bridge should be near the mid point for that value of S should be changed. For balance of bridge, `(R)/(S) = (l_(1))/(100 - l_(1)) = (2.9)/(100 - 2.9) = (2.9)/(97.1)approx=0.02987` `therefore S= 100 xx 0.02987= 2.987 Omega` `thereforeSapprox 3 Omega` so, option (C ) Is CORRECT . |
|