A meter bridge setup is shown in the figure. It is used to determine an unknown resistance $R$ using a given resistor of $15Ω$ . The galvanometer $\left(G\right)$ shows null defection when tapping key is at $43cm$ mark from end $A$ . If the end correction for end $A$ is $2cm$ , then the determined value of $R$ will be $Ω$ .

Question

A meter bridge setup is shown in the figure. It is used to determine an unknown resistance R using a given resistor of

Quantrex Academy · Accepted Answer

Correct answer: 19

Using the conditions of a balanced wheatstone bridge and adding the end correction. (15)/(R) = (l + e)/((L + e) - (l + e)) ⇒ (15)/((43 + 2)) = (R)/((102 - 45)) ⇒ R = (57)/(45) × 15 ⇒ R = 19Ω

A meter bridge setup is shown in the figure. It is used to...

Correct answer

Step-by-step solution

More from Current Electricity