Question 415: Current Electricity

Question

Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer.
The value of the unknown resister $$R$$ is

Accepted Answer

According to the condition of balancing
$${{55} \over {20}} = {R \over {80}} \Rightarrow R = 220\Omega $$

Answer

$$13.75\Omega $$

Answer

$$220\Omega $$

Answer

$$110\Omega $$

Answer

$$55\Omega $$

Current Electricity