In the adjoining circuit, the battery $E_1$ has an $e.m.f.$ of $12\, volts$ and zero internal resistance, while the battery $E_2$ has an $e.m.f.$ of $2\, volts$. If the galvanometer $G$ reads zero, then the value of the resistance $X$ in $ohms$ is
Medium
Download our app for free and get started
$i=\frac{10}{500}$
$2=\mathrm{i} \times \mathrm{x}$
$x=100$
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1The given figure shows $a$ network of resistances and $a$ battery. Identify the correct statement $(s)$View Solution
- 2Two metal wires of identical dimensions are connected in series. If $\sigma _1$ and $\sigma _2$ are the conductivities of the metal wires respectively, the effective conductivity of the combination isView Solution
- 3Two resistors $400\, \Omega$ and $800\, \Omega$ are connected in series across a $6 V$ battery. The potential difference measured by a voltmeter of $10\, k \Omega$ across $400\, \Omega$ resistor is close to$....V$View Solution
- 4A wire of resistance $4 \,\Omega$ is stretched to twice its original length. The resistance of stretched wire would be ........... $\Omega$View Solution
- 5A Daniel cell is balanced on $125\,cm$ length of a potentiometer wire. Now the cell is short-circuited by a resistance $2\, ohm$ and the balance is obtained at $100\,cm$. The internal resistance of the Daniel cell is .............. $ohm$View Solution
- 6In the circuit shown below, The reading of the voltmeter $V$ is ...........View Solution
- 7$V-i$ graphs for parallel and series combination of two identical resistors are as shown in figure. Which graph represents parallel combinationView Solution
- 8At room temperature, copper has free electron density of $8.4 \times {10^{28}}$ per ${m^3}$. The copper conductor has a cross-section of $10^{-6} \,m^2$ and carries a current of $5.4\, A$. The electron drift velocity in copper isView Solution
- 9In the circuit shown, the reading of ammeter when switch $S$ is open and when switch $S$ is closed respectively areView Solution
- 10Two cells are connected between points $A$ and $B$ as shown. Cell $1$ has emf of $12\,V$ and internal resistance of $3\,\Omega$. Cell $2$ has emf of $6\,V$ and internal resistance of $6\,\Omega$. An external resistor $R$ of $4\,\Omega$ is connected across $A$ and $B$. The current flowing through $R$ will be $.............A$.View Solution
