The voltmeter has a range of 10 V and its in | vedclass

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

Question

(D) To increase the range of a voltmeter,a high resistance $R$ must be connected in series with the voltmeter.Let $V$ be the original range $(10 \ V)$

Vedclass · Accepted Answer

$25 \ \Omega$ resistance in series

Vedclass · Answer

(D) To increase the range of a voltmeter,a high resistance $R$ must be connected in series with the voltmeter.Let $V$ be the original range $(10 \ V)$,$V'$ be the new range $(15 \ V)$,$G$ be the internal resistance of the voltmeter $(50 \ \Omega)$,and $I_g$ be the full-scale deflection current.First,calculate the full-scale current: $I_g = V / G = 10 \ V / 50 \ \Omega = 0.2 \ A$.Now,for the new range $V'$,the total resistance becomes $G + R$. Thus,$V' = I_g(G + R)$.Substituting the values: $15 = 0.2(50 + R)$.$15 / 0.2 = 50 + R$.$75 = 50 + R$.$R = 75 - 50 = 25 \ \Omega$.Therefore,a $25 \ \Omega$ resistance must be connected in series.

The voltmeter has a range of $10 \ V$ and its internal resistance is $50 \ \Omega$. To increase the range of the voltmeter to $15 \ V$,the resistance which is to be connected is:

Similar Questions

$A$ galvanometer coil has a resistance of $15\; \Omega$ and the meter shows full-scale deflection for a current of $4\; mA$. How will you convert the meter into an ammeter of range $0$ to $6\; A$?

$A$ galvanometer can be converted into an ammeter by connecting:

The resistance of an ammeter is $13\, \Omega$ and its scale is graduated for a current up to $100\, A$. After an additional shunt has been connected to this ammeter,it becomes possible to measure currents up to $750\, A$ by this meter. The value of the shunt resistance is:

To convert a $800\, mV$ range millivoltmeter of resistance $40\,\Omega$ into an ammeter of $100\, mA$ range,the resistance to be connected as a shunt is .............. $\Omega$.

$A$ galvanometer acting as a voltmeter should have . . . . . . .

Vedclass Test Series

Exam Paper Generator

Online Exam Module