In the circuit shown, when the key $k $ is pressed at time $t = 0$, which of the following statements about current $I$ in the resistor $AB $ is true
Diffcult
Download our app for free and get started
When $\mathrm{k}$ is pressed at $t=0,$ the capacitor will start charging through resistor in between $A$ and $B$ and no current will flow through resistor on the right.
Thus, at $t=0$ the current, $I=\frac{2}{1000}=2 m A$
After long time the charging will stop and current will flow through both resistors.
now current is $I=\frac{2}{1000+1000}=1 \mathrm{m} \mathrm{A}$
Download our app
and 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.*
The distance between the plates of a parallel plate capacitor is $d$. A metal plate of thickness $d/2$ is placed between the plates. The capacitance would then be
Three capacitors of capacitance $3\,\mu \,F,\,10\,\mu \,F\,$ and $15\,\mu \,F\,$ are connected in series to a voltage source of $100\,V$. The charge on $15\,\mu \,F\,$is.......$\mu C$
$125$ identical drops each charged to the same potential of $50\;volts$ are combined to form a single drop. The potential of the new drop will be......$V$
Three plates $A, B$ and $C$ each of area $0.1 \ m^2$ are separated by $0.885\ mm$ from each other as shown in the figure. $A$ $10$ $V$ battery is used to charge the system. The energy stored in the system is
A capacitor with capacitance $5\,\mu F$ is charged to $5\,\mu C.$ If the plates are pulled apart to reduce the capacitance to $2\,\mu F,$ how much work is done?
Sixty-four drops are jointed together to form a bigger drop. If each small drop has a capacitance $C$, a potential $V$, and a charge $q$, then the capacitance of the bigger drop will be
A capacitor when filled with a dielectric $K = 3$ has charge ${Q_0}$, voltage ${V_0}$ and field ${E_0}$. If the dielectric is replaced with another one having $K = 9$ the new values of charge, voltage and field will be respectively
A parallel plate capacitor has an electric field of ${10^5}\,V/m$ between the plates. If the charge on the capacitor plate is $1\,\mu \,C$, the force on each capacitor plate is......$N$