B M Sharma Solutions for Chapter: Heating Effects of Current, Exercise 3: Exercise

A battery of emf $2 \mathrm{V}$ and internal resistance $1 \mathrm{\Omega }$ is connected across terminals $A$ and $B$ of the circuit shown in the figure.

Two electric bulbs rated as $25 \mathrm{W}, -220 \mathrm{V}$ and $100 \mathrm{W}, -220 \mathrm{V}$ are connected in series across a $220 \mathrm{V}$ voltage source. The $25 \mathrm{W}$ and $100 \mathrm{W}$ bulbs now draw $P_1$ and $P_2$ powers, respectively,

In the circuit shown in figure,

A variable current flow through a $1 \mathrm{\Omega }$ resistor for $2 \mathrm{s}$. Time dependence of the current is shown in the graph.

Two light bulbs shown in the circuit have ratings $A(24 \mathrm{V},24 \mathrm{W})$ and $B(24 \mathrm{V}, 36 \mathrm{W})$ as shown. When the switch is closed.

A series circuit consists of two capacitors, a resistor and an ideal voltage source. The circuit is initially at steady state. Now a conducting wire is shorted across the capacitor $C$ as shown by dotted line. After shorting the wire, select the correct statement/statements.

$AB$ is part of a circuit as shown that absorbs energy at a rate of $50 \mathrm{W}$. $E$ is an emf device that has no internal resistance.

The switch $S$ has been closed for long time and the electric circuit shown carries a steady current. Let $C_1=3.0 \mathrm{\mu }\mathrm{F}, C_2=6.0 \mathrm{\mu }\mathrm{F}, R_1=4.0 \mathrm{k}\mathrm{\Omega }$ and $R_2=7.0 \mathrm{k}\mathrm{\Omega }$. The power dissipated in $R_2$ is $2.8 \mathrm{W}.$