In the adjoining figure,the emf of the cell i | vedclass

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

Question

(B) The voltmeter is connected in parallel with the $80 \, \Omega$ resistor.Let the equivalent resistance of the parallel combination of the voltmeter

Vedclass · Accepted Answer

$1.33$

Vedclass · Answer

(B) The voltmeter is connected in parallel with the $80 \, \Omega$ resistor.Let the equivalent resistance of the parallel combination of the voltmeter $(80 \, \Omega)$ and the resistor $(80 \, \Omega)$ be $R'$.$R' = \frac{80 	imes 80}{80 + 80} = \frac{6400}{160} = 40 \, \Omega$.Now,this $R'$ is in series with the $20 \, \Omega$ resistor.So,the total equivalent resistance of the circuit is $R_{eq} = 20 + 40 = 60 \, \Omega$.The total current in the circuit is $I = \frac{V}{R_{eq}} = \frac{2}{60} = \frac{1}{30} \, A$.The reading of the voltmeter is the potential difference across the parallel combination $R'$,which is given by $V' = I 	imes R'$.$V' = \frac{1}{30} 	imes 40 = \frac{4}{3} = 1.33 \, V$.

In the adjoining figure,the $emf$ of the cell is $2 \, V$ and its internal resistance is negligible. The resistance of the voltmeter is $80 \, \Omega$. The reading of the voltmeter will be ................ $volt$.

Similar Questions

$A$ resistor is connected to a battery of $12 \text{ V}$ emf and internal resistance $2 \text{ }\Omega$. If the current in the circuit is $0.6 \text{ A}$, the terminal voltage of the battery is: (in $\text{ V}$)

An external resistance $R$ is connected to a battery of $e.m.f.$ $V$ and internal resistance $r$. The joule heat produced in resistor $R$ is maximum when $R$ is equal to

In the given circuit,if the current flowing through the $5 \Omega$ resistor is $0.5 \text{ A}$,then the value of $E$ is: (in $\text{ V}$)

$A$ coil of $100 \, W, 220 \, V$ is cut into two equal parts and connected in parallel. How much heat in $J$ is produced in $1 \, sec$?

In the circuit shown below,the current that flows from $a$ to $b$ when the switch $S$ is closed is ............... $A$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module