Question 348: Current Electricity

Question

In a meter bridge experiment, the circuit
diagram and the corresponding observation
table are shown in figure
SI. No.
R($\Omega $)
l(cm)
1.
1000
60
2.
100
13
3.
10
1.5
4.
1
1.0
Which of the readings is inconsistent?
![](https://imagex.cdn.examgoal.net/3rsa0w2w9jwysk0ap/3c2e871e-0a07-47bf-aac0-dd33154865d4/48e90f10-901f-11e9-86c1-73f7f991b766/file-3rsa0w2w9jwysk0aq.png)

Accepted Answer

$as\,x = {{R\left( {100 - l} ight)} \over l}$
$for\,(A)\,\,\,\,x = {{1000 	imes \left( {100 - 60} ight)} \over {40}} \approx 667$
$for\,(B)\,\,\,\,\,x = {{100 	imes \left( {100 - 13} ight)} \over {13}} \approx 669$
$for\,(C)\,\,\,\,\,x = {{10 	imes \left( {100 - 1.5} ight)} \over {98.5}} \approx 667$
$for\,(D)\,\,\,\,\,x = {{1 	imes \left( {100 - 1} ight)} \over 1} \approx 667$
So reading in serial no. (4) is completely different hence correct answer (A).

Answer

4

Answer

3

Answer

2

Answer

1

Current Electricity

In a meter bridge experiment, the circuit diagram and the corresponding observation table are shown in figure SI. No. R(\Omega ) l(cm) 1. 1000 60 2. 100 13 3. 10 1.5 4. 1 1.0 Which of the readings is inconsistent?

Choose the correct answer: