In the circuit shown, the reading of the amme | vedclass

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

Question

(B) When switch $S$ is open, the $2\, \Omega$ resistor in the upper branch is disconnected. The circuit consists of a $3\, \Omega$ resistor in series

Vedclass · Accepted Answer

$4\, A$ and $5\, A$

Vedclass · Answer

(B) When switch $S$ is open, the $2\, \Omega$ resistor in the upper branch is disconnected. The circuit consists of a $3\, \Omega$ resistor in series with a $2\, \Omega$ resistor.Total resistance $R_{eq} = 3\, \Omega + 2\, \Omega = 5\, \Omega$.The reading of the ammeter is $i = \frac{V}{R_{eq}} = \frac{20\, V}{5\, \Omega} = 4\, A$.When switch $S$ is closed, the two $2\, \Omega$ resistors are in parallel. The equivalent resistance of this parallel combination is $R_p = \frac{2\, \Omega 	imes 2\, \Omega}{2\, \Omega + 2\, \Omega} = 1\, \Omega$.The total resistance of the circuit is $R_{eq}' = 3\, \Omega + 1\, \Omega = 4\, \Omega$.The reading of the ammeter is $i' = \frac{V}{R_{eq}'} = \frac{20\, V}{4\, \Omega} = 5\, A$.Thus, the readings are $4\, A$ and $5\, A$ respectively.

In the circuit shown, the reading of the ammeter when switch $S$ is open and when switch $S$ is closed respectively are

Similar Questions

$A$ copper voltameter is connected to a $12 \, V$ source,and $2 \, g$ of copper is deposited in $30 \, min$. If this cell is connected to a $6 \, V$ source,how much copper (in $g$) will be deposited in $45 \, min$?

The effective resistance between $A$ and $B$ of the shown network,where the resistance of each resistor is $R$,is

Which of the following is not a correct statement?

In the given circuit,the internal resistance of the cell is zero. If $i_1$ and $i_2$ are the readings of the ammeter when the key $(K)$ is opened and closed respectively,then $i_1: i_2=$

In the given figure,the steady state current $I$ is ................. $A$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module