In the circuit shown below,the current that f | vedclass

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

Question

(C) When the switch $S$ is closed,the points $a$ and $b$ are short-circuited. The circuit consists of two loops. Let the potential at $b$ be $0 \ V$.

Vedclass · Accepted Answer

$+1$

Vedclass · Answer

(C) When the switch $S$ is closed,the points $a$ and $b$ are short-circuited. The circuit consists of two loops. Let the potential at $b$ be $0 \ V$. Then the potential at $a$ is also $0 \ V$. The $10 \ V$ battery is connected across the $20 \ \Omega$ resistor. The current through the $20 \ \Omega$ resistor is $I_1 = 10 \ V / 20 \ \Omega = 0.5 \ A$ (upwards). The $10 \ V$ battery is also connected across the $10 \ \Omega$ resistor. The current through the $10 \ \Omega$ resistor is $I_2 = 10 \ V / 10 \ \Omega = 1.0 \ A$ (from right to left). At node $a$,the current $I_2$ arrives from the right and splits into two paths: one through the $5 \ \Omega$ resistor and one through the switch $S$ towards $b$. The current through the $5 \ \Omega$ resistor is $I_3 = V_a / 5 \ \Omega = 0 \ V / 5 \ \Omega = 0 \ A$. Therefore,all the current $I_2$ must flow through the switch $S$ from $a$ to $b$. Thus,the current from $a$ to $b$ is $1.0 \ A$.

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

Similar Questions

In the circuit shown,the currents $i_{1}$ and $i_{2}$ are

$A$ circuit is comprised of eight identical batteries and a resistor $R = 0.8\,\Omega$. Each battery has an $emf$ of $1.0\, V$ and internal resistance of $0.2\,\Omega$. The voltage difference across any of the batteries is ............. $V$.

The smallest temperature difference that can be measured with a combination of a thermocouple of thermo $e.m.f.$ $30\,\mu V$ per degree and a galvanometer of $50\,\Omega$ resistance,capable of measuring a minimum current of $3 \times 10^{-7} \, A$ is ............... $^\circ C$.

The equivalent resistance between the points $P$ and $Q$ of the circuit given is

$A$ fuse wire of radius $0.2 \,mm$ blows off with a current of $5 \,A$. The fuse wire of the same material but of radius $0.3 \,mm$ will blow off with a current of:

Vedclass Test Series

Exam Paper Generator

Online Exam Module