Which of the four resistances P, Q, R and S g | vedclass

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

Question

$\mathrm{R}_{1}=\mathrm{P}+\mathrm{Q}=2\, \Omega+4 \,\Omega=6\, \Omega$

$\mathrm{R}_{2}=\mathrm{R}+\mathrm{S}=1 \,\Omega+2 \,\Omega=3 \,\Omega$

Vedclass · Accepted Answer

$S$

Vedclass · Answer

$\mathrm{R}_{1}=\mathrm{P}+\mathrm{Q}=2\, \Omega+4 \,\Omega=6\, \Omega$

$\mathrm{R}_{2}=\mathrm{R}+\mathrm{S}=1 \,\Omega+2 \,\Omega=3 \,\Omega$

$\mathrm{I}_{1} \mathrm{R}_{1}=\mathrm{I}_{2} \mathrm{R}_{2}$

$\mathrm{I}_{1}=\frac{\mathrm{R}_{2}}{\mathrm{R}_{1}} \mathrm{I}_{2}=\frac{3}{6} \mathrm{I}_{2}=\frac{\mathrm{I}_{2}}{2}$

or $\mathrm{I}_{2}=2 \mathrm{I}_{1}$

Heat flow $\mathrm{H}=\mathrm{I}^{2} \mathrm{Rt}$

For $Q, H_{Q}=I_{1}^{2} Q t=\frac{I_{2}^{2}}{4} 	imes 4 t=I_{2}^{2} t$

For $\mathrm{S}, \mathrm{H}_{\mathrm{S}}=\mathrm{I}_{2}^{2} \mathrm{St}=\mathrm{I}_{2}^{2} \cdot 2 \mathrm{t}=2 \mathrm{I}_{2}^{2} \mathrm{t}$

$	herefore $ Greatest amount of heat generated by $S$.

Which of the four resistances $P, Q, R$ and $S$ generate the greatest amount of heat when a current flows from $A$ to $B$ ?

Similar Questions

The capacitor shown in fig. is in steady state. The energy stored in the capacitor is

A wire when connected to $220\,V$ mains supply has power dissipation ${P_1}$. Now the wire is cut into two equal pieces which are connected in parallel to the same supply. Power dissipation in this case is ${P_2}$. Then ${P_2}:{P_1}$ is

The electric current passing through a metallic wire produces heat because of

In the following circuit, bulb rated as $1.5\, V$, $0.45\, W$. If bulbs glows with full intensity then what will be the equivalent resistance between $X$ and $Y$ ............. $\Omega$

A cable of resistance $10\,\Omega $ carries electric power from a generator producing $250\, kW$ at $10000\, volt$. The current in the cable is ............. $A$