Question 547: Current Electricity

Question

The resistances in the left and right gap of a metre bridge are $40 \Omega$ and $60 \Omega$ respectively. When the bridge is balanced, the distance of the null point from the centre of the wire towards left is

Accepted Answer

$$\begin{aligned}
&	ext { From the given data, }\
&\begin{array}{ll} 
& \frac{40}{60}=\frac{50-l}{50+l} \
& 2000+40 l=3000-60 l \
& 100 l=1000 \
	herefore \quad & l=10 \mathrm{~cm}
\end{array}
\end{aligned}$$

Answer

5 cm

Answer

10 cm

Answer

15 cm

Answer

20 cm

Current Electricity

The resistances in the left and right gap of a metre bridge are 40 \Omega and 60 \Omega respectively. When the bridge is balanced, the distance of the null point from the centre of the wire towards left is

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