- 1(current)
Q. No.The measurement of an unknown resistance \(R\) is to be carried out using a Wheatstone bridge. Two students perform an experiment in two ways. The first students take \(R_2=10~\Omega\) and \(R_1=5~\Omega.\) The other student takes \(R_2=1000~\Omega\) and \(R_1=500~\Omega.\) In the standard arm, both take \(R_3=5~\Omega.\) Both find \(R = \dfrac{R_{2}}{R_{1}} \times R_{3} = 10 ~ \Omega \) within errors.
| (a) | The errors of measurement of the two students are the same. |
| (b) | Errors of measurement do depend on the accuracy with which \(R_2\) and \(R_1\) can be measured. |
| (c) | If the student uses large values of \(R_2\) and \(R_1,\) the currents through the arms will be feeble. This will make the determination of the null point accurately more difficult. |
| (d) | Wheatstone Bridge is a very accurate instrument and has no errors of measurement. |
Choose the correct option from the given ones:
| 1. | (a) and (c) only |
| 2. | (c) and (d) only |
| 3. | (b) and (c) only |
| 4. | (c) and (d) only |
Subtopic: Wheatstone Bridge |
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