Home
Class 12
PHYSICS
Consider the meter bridge circuit withou...

Consider the meter bridge circuit without neglecting and corrections (`alpha`, `beta`)

Now er start taking obsevation. At the position of `R`, unknown resistance is used, and at position of `S`, `300Omega` resistance is used. If the balanced length was found to be `l=26cm`, then estimate the unknown resistance.

A

`108Omega`

B

`105.4Omega`

C

`100Omega`

D

`110Omega`

Text Solution

Verified by Experts

The correct Answer is:
A
`(l_(m))/((100-l)_(eq))=(R )/(300)`
`=(R )/((300)=(26+1)/((100-26)+1)=(27)/(75)` gtbrgt `=R=(300xx27)/(75)=108Omega`
`(DeltaR_(P))/(R_(P))=(10)/(7)[(0.1)/(2)+(0.2)/(5)+(0.3)/(7)]`
`=(10)/(7)[0.05+0.04+0.04]`
`=(10)/(7)xx0.13=(1.3)/(7)=0.18~0.2`
`R_(P)=(1.4+-0.2)Omega`
Promotional Banner

Topper's Solved these Questions

  • EXPERIMENTAL PHYSICS

    NARAYNA|Exercise Level-VI(Single answer)|25 Videos

  • ELECTROSTATICS AND GAUSS LAW

    NARAYNA|Exercise Intergers type question|11 Videos

  • MAGNETISM

    NARAYNA|Exercise LEVEL-II (H.W)|24 Videos

Similar Questions

Explore conceptually related problems

In a meter bridge, null point is 20 cm , when the known resistance R is shunted by 10 Omega resistance, null point is found to be shifted by 10 cm. Find the unknown resistance X .

In meter bridge , the balancing length from left is found to be 20 cm when standard connected of 1 Omega is in right gap . The value of unknown resistance is

In a meter bride, null point is 20 cm , when theknown resistence R is shunted by 10 Omega resistence, null point is found to be shifted by 10 cm . Find the unknown resistence X .

A resistance of 5Omega is connected across the left gap of a metrebridge and unknown resistance which is greater than 5Omega is connected across the right gap. When these resistances are interchanged the balancing length is found to change by 20cm. What is the value of the unknown resistance?

In a meter bridge, null point is at l=33.7cm , when the resistance S is shunted by 12Omega resitance the null point is found to be shifted by a distance of 18.2 cm . The value of unknown resistance R should be

Using Kirchoff's rules determine the value of unknown resistance R in the circuit so that no current flows through 4 Omega resistance. Also find the potential difference between A and D.