Question 1 :
A 16 pF capacitor is connected to 70 V supply. The amount of electric energy stored in the capacitor is:

Question 2 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">The energy stored in a sphere of $10$ cm radius&#160;when the sphere is charged to a potential difference of&#160;$300$&#160;V is</p>

Question 3 :
If a capacitor having capacitance of $1200\mu F$ is charged at a uniform rate of $100\mu C/s$, what is the time required to increase its potential by $20$ volts?

Question 4 :
A metallic sphere of radius $18cm$ has been given a charge of $5\times { 10 }^{ -6 }C$. The energy of the charged conductor is :

Question 5 :
The capacitance of a variable capacitor joined with the battery of $100$V is changed from $2\mu F$ to $10\mu F$. What is the change in the energy stored in it?

Question 6 :
A capacitor of capacity C$_{1}$ charged up to V volt and then connected to an uncharged capacitor C$_{2}$.Then final P.D. across each will be:

Question 7 :
$R=100\ k\Omega$ and $C=1\ \mu F$ are connected in a series with a $12\ volt$ battery. What is the maximum energy stored in the capacitor:

Question 8 :
The potential energy of system of two equal negative point charges of $2\mu C$ each held 1 m apart in air is ($k = 9 \times 10^9\, SI \,unit$)

Question 9 :
A potential difference of $\Delta V$exists between two plates of a parallel-plate capacitor with capacitance C . A dielectric with a dielectric constant of kis then placed between the plates of the capacitor. What is the energy stored in the capacitor?

Question 10 :
The amount of work done is increasing the voltage across the plates of a capacitor from $5V$ to $10V$ is $W$. The work done in increasing it from $10V$ to $15V$ will be :

Question 11 :
A soap bubble of radius $\sqrt 7$cm is blown. Work done in this process is used to store energy in capacitor at potential of $1$V using transducer. Charge stored is ________.&#160;$(T=30 dyne/cm)$

Question 12 :
A parallel plate capacitor is connected to a battery of constant emf. Let the electric field at a given point between the plate be $E_0$, when there is no medium between the plates. The new electric field at that point, if a medium of dielectric constant A is introduced between them, is?

Question 13 :
Assertion: If the distance between parallelplatesof a capacitor is halved and dielectricconstant isthree times, then the capacitancebecomes 6 times.<br>Reason : Capacity of the capacitor does not depend upon the nature of the material.

Question 14 :
64 identical spheres of charge q and capacitance C each are combined to form a large sphere. The charge and capacitance of the large sphere is:

Question 15 :
<p class="wysiwyg-text-align-left"><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">$n$ capacitors each of capacitance 2 $\mu F$ are connected in parallel and a potential difference of $200\; V$&#160; is applied to the combination. The total charge on all the positive plates is $1$ Coulomb then $n$ is equal to :<br/></p>

Question 17 :
The energy required to charge a parallel plate condenser of plate separation d and plate area of cross-section A such that the uniform electric field between the plates is E, is :<br/>

Question 18 :
A parallel-plate vacuum capacitor with plate area $A$ and separation $x$ has charges $+Q$ and $-Q$ on its plates. The capacitor is disconnected from the source of charge, so the charge on each plate remains fixed.&#160;What is the total energy stored in the capacitor?<br/>

Question 19 :
Three capacitors of same capacitance are connected in parallel When they are connected to a cell of $2$ volt, total charge of $1.8 \mu C$&#160;is accumulated on them. Now after discharging they are connected m series and then charged by the same cell The total charge stored in them will be:

Question 20 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">A parallel plate capacitor has area of each plate A, the separation between the plates is d. It is charged to a potential V and then disconnected from the battery. The amount of work done in filling the capacitor completely with a dielectric constant k is :<br/></p>