Question 273: 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?

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: