In the given figure,the potentiometer wire AB | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The current $I$ flowing through the potentiometer wire $AB$ is given by $I = \frac{V_{source}}{R_{total}} = \frac{5 \, V}{R_{AB} + R_{series}} = \

Vedclass · Accepted Answer

$8$

Vedclass · Answer

(D) The current $I$ flowing through the potentiometer wire $AB$ is given by $I = \frac{V_{source}}{R_{total}} = \frac{5 \, V}{R_{AB} + R_{series}} = \frac{5}{5 + 45} = \frac{5}{50} = 0.1 \, A$.The potential drop across the wire $AB$ is $V_{AB} = I 	imes R_{AB} = 0.1 	imes 5 = 0.5 \, V$.The potential gradient $k$ along the wire is $k = \frac{V_{AB}}{L} = \frac{0.5 \, V}{10 \, m} = 0.05 \, V/m$.For the balancing length $l$ corresponding to an $emf$ of $E = 0.4 \, V$,we have $E = k 	imes l$.$0.4 = 0.05 	imes l$.$l = \frac{0.4}{0.05} = 8 \, m$.

In the given figure,the potentiometer wire $AB$ has a resistance of $5 \, \Omega$ and a length of $10 \, m$. The balancing length $AM$ for the $emf$ of $0.4 \, V$ is ............... $m$.

Similar Questions

For a cell,the balancing length is $0.60 \, m$. For another cell having an electromotive force $(emf)$ $0.1 \, V$ less than the first one,the balancing length is $0.55 \, m$. What are the $emf$ values of the two cells?

The potentiometer is best for measuring voltage,as

Define potential gradient and write its $SI$ unit.

In a potentiometer experiment, the balancing length with a cell is $560 \, cm$. When an external resistance of $10 \, \Omega$ is connected in parallel to the cell, the balancing length changes by $60 \, cm$. Find the internal resistance of the cell.

When a cell of $E$.$M$.$F$. '$E_1$' is connected to a potentiometer wire, the balancing length is '$l_1$'. Another cell of $E$.$M$.$F$. '$E_2$' $(E_1 > E_2)$ is connected along with $E_1$ such that the two cells oppose each other, and the balancing length is '$l_2$'. The ratio $E_1 : E_2$ is

Vedclass Test Series

Exam Paper Generator

Online Exam Module