In the circuit shown in the given figure the resistance $R_1$ and $R_2$ are respectively
Diffcult
Download our app for free and get started
$\mathrm{V}_{\mathrm{BE}}=\mathrm{V}_{\mathrm{CD}}=\mathrm{V}_{\mathrm{CE}}$
$\Rightarrow 0.5 \mathrm{R}_{2}=1 \times 20$
$\Rightarrow \mathrm{R}_{2}=40\, \Omega$
$10 \mathrm{i}=1 \times 20 \Rightarrow \mathrm{i}=2 \mathrm{\,A}.$
$\therefore \mathrm{i}_{0}=0.5+1+2=3.5 \mathrm{\,A}$
$\therefore \mathrm{V}_{\mathrm{AB}}=69-\mathrm{V}_{\mathrm{BE}}$
$\Rightarrow \mathrm{i}_{0} \mathrm{R}_{1}=69-20$
$\Rightarrow \mathrm{R}_{1}=14\, \Omega$
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
- 1View SolutionWhen the length and area of cross-section both are doubled, then its resistance
- 2A torch battery consisting of two cells of $1.45\, volts$ and an internal resistance $0.15\,\Omega $, each cell sending currents through the filament of the lamps having resistance $1.5\,ohms$. The value of current will be ....... $A$View Solution
- 3In the circuit shown in figure, the power which is dissipated as heat in the $6\,\Omega $ resistor is $6\,W$. What is the value of resistance $R$ in the circuit? ................ $\Omega$View Solution
- 4Two cells, $e.m.f.$ of each is $E$ and internal resistance $r$ are connected in parallel between the resistance $R$. The maximum energy given to the resistor will be, only whenView Solution
- 5The circuit shown in the figure consists of a battery of $emf$ $\varepsilon = 10 \,V$ ; a capacitor of capacitance $C = 1.0$ $ \mu F$ and three resistor of values $R_1 = 2$ $\Omega$ , $R_2 = 2$ $\Omega$ and $R_3 = 1$ $\Omega$ . Initially the capacitor is completely uncharged and the switch $S$ is open. The switch $S$ is closed at $t = 0.$View Solution
- 6View SolutionKirchhoff's second law is based on the law of conservation of
- 7View SolutionThe temperature at which thermal electric power of a thermo couple becomes zero is called
- 8On giving $220\,V$ to a resistor the power dissipated is $40\,W$ then value of resistance is ............... $\Omega$View Solution
- 9For a cell of $e.m.f.$ $2\,V$, a balance is obtained for $50\, cm$ of the potentiometer wire. If the cell is shunted by a $2\,\Omega $ resistor and the balance is obtained across $40\, cm$ of the wire, then the internal resistance of the cell is ............. $\Omega $View Solution
- 10What is the equivalent resistance of the circuit ............. $\Omega$View Solution
