JEE Advanced 2008Paper 1
- Exam
- JEE Advanced
- Year
- 2008
- Paper
- Paper 1
- Subject
- Physics
- Chapter
- Current Electricity
JEE Advanced 2008 · Paper 1 · Physics · Current Electricity
Statement 1 In a Meter Bridge experiment, null point for an unknown...
Statement a Meter Bridge experiment, null point for an unknown resistance is measured. Now, the unknown resistance is put inside an enclosure maintained at a higher temperature. The null point can be obtained at the same point as before by decreasing the value of the standard resistance.
and Statement 2 Resistance of a metal increase with increase in temperature.
Options
- AStatement 1 is true, Statement 2 is true, Statement 2 is a correct explanation for Statement 1.
- BStatement 1 is true, Statement 2 is true, Statement 2 is not a correct explanation for Statement 1.
- CStatement 1 is true, Statement 2 is false.
- DStatement 1 is false, Statement 2 is true
Correct answer
D. Statement 1 is false, Statement 2 is true
Step-by-step solution
With increase in temperature, the value of unknown resistance will increase.
In balanced Wheatstone bridge condition,
Here, value of standard resistance,
value of unknown resistance .
To take null point at same point or to remain unchanged, should also remain unchanged. Therefore, if is increasing should also increase.
correct option is (d).