In the experiment of calibration of a voltmet | vedclass

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

Question

(D) In a potentiometer experiment,the potential difference $V$ is directly proportional to the balancing length $l$,i.e.,$V = kl$,where $k$ is the pot

Vedclass · Accepted Answer

$-0.05$

Vedclass · Answer

(D) In a potentiometer experiment,the potential difference $V$ is directly proportional to the balancing length $l$,i.e.,$V = kl$,where $k$ is the potential gradient.Given,for the standard cell,$E = 1.1 	ext{ V}$ balances at $l_1 = 440 	ext{ cm}$.Thus,$1.1 = k 	imes 440 \implies k = \frac{1.1}{440} 	ext{ V/cm}$.The actual potential difference $V_{actual}$ across the resistance,which balances at $l_2 = 220 	ext{ cm}$,is:$V_{actual} = k 	imes l_2 = \left( \frac{1.1}{440} ight) 	imes 220 = \frac{1.1}{2} = 0.55 	ext{ V}$.The voltmeter reading is given as $V_{reading} = 0.5 	ext{ V}$.The error in the reading is defined as $	ext{Error} = V_{reading} - V_{actual}$.$	ext{Error} = 0.5 - 0.55 = -0.05 	ext{ V}$.

Similar Questions

$A$ cell can be balanced against $110 \, cm$ and $100 \, cm$ of potentiometer wire,respectively with and without being short-circuited through a resistance of $10 \, \Omega$. Its internal resistance is ............... $\Omega$.

$A$ potentiometer wire has a length of $5 \, m$ and a resistance of $5 \, \Omega$. If the null point is obtained at $300 \, cm$,what is the $emf$ $E$ of the cells (connected in parallel) in $V$?

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 such that the two cells oppose each other,then the balancing length is $l_2$. The ratio $E_1 : E_2$ is

$A$ potentiometer wire of length $L$ and a resistance $r$ are connected in series with a battery of e.m.f. $E_0$ and a resistance $r_1$. An unknown e.m.f. $E$ is balanced at a length $l$ of the potentiometer wire. The e.m.f. $E$ will be given by

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

Vedclass Test Series

Exam Paper Generator

Online Exam Module