Question 1 :
The capacity of a condenser is $4 \times 10^{-6}$ farad and its potential is 100 volts. The energy released on discharging it fully will be

Question 2 :
The capacity of a condenser is 20$\mu F$ $\displaystyle $ and the potential is 20 V. The energy released an discharging it fully will be

Question 3 :
The work done in moving a single positive charge from infinity to a point is called ..... at that point

Question 4 :
A capacitor has a capacitance of $C$ when a potential difference of $V$ is across it.<br>The potential difference is increased to $2V$, what is the new capacitance?

Question 5 :
The potential energy of a proton is $3.2\times 10^{-18}J$ at a particular point. The electric potential at this point is:(Given charge on a proton is $1.6 \times 10^{-19}\ C$)

Question 6 :
From a supply of identical capacitors rated $8\ \mu F, 250\ V$, the minimum number of capacitors required to form a composite $16\ \mu F, 1000\ V$ capacitor is:

Question 7 :
A conducting sphere of radius r has a charge. Then :<br>

Question 8 :
If on combining two charged bodies, the current does not flow then :<br/>

Question 9 :
The amount of charge stored in a capacitor is directly proportional to the voltage applied across the capacitor.

Question 10 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Select correct Statements :&#160;</p><p class="wysiwyg-text-align-left">a) Charge cannot be isolated</p><p class="wysiwyg-text-align-left">b) Repulsion is the sure test to know the presence of charge</p><p class="wysiwyg-text-align-left">c) Waxed paper is dielectric in paper capacitor</p><p class="wysiwyg-text-align-left">d) Variable capacitor is used in tuning circuits in radio</p>

Question 11 :
Breakdown voltage is<br/>$A$.&#160;voltage at which dielectric behaves as conductor<br/>$B$.&#160;voltage at which molecules starts flowing inside the dielectric freely.<br/>Which of the following is correct regarding above case,

Question 13 :
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 15 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">When air is replaced by a dielectric medium of constant $K$, the capacity of the condenser:</p>

Question 16 :
Assertion: Coaxial cables make use of a dielectric between the two conducting lines. Reason: dielectrics are good insulators.

Question 17 :
A $2 \mu F$ capacitor is charged to $100 V$ and then its plates are connected by a conducting wire, the heat produced is :

Question 18 :
How much work is done moving an electron from a potential of 2V to 5V?

Question 19 :
The electric volt is a measure of electrical potential. Identify which of the following can be defined as a volt.

Question 20 :
<p class="wysiwyg-text-align-left"><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">To obtain $3 \mu F$<i><span class="wysiwyg-font-size-medium"><span class="wysiwyg-font-size-medium">&#160;</i><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">capacity from three capacitors of&#160;<span class="wysiwyg-font-size-medium"><span class="wysiwyg-font-size-medium"><span class="wysiwyg-font-size-small">$2 \mu F$<i><span class="wysiwyg-font-size-medium"><span class="wysiwyg-font-size-medium"> </i><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">each, they will be arranged as follows:</p>

Question 21 :
If $C$ is the value of the capacitance of a capacitor filled with a given dielectric and $a$ is the capacitance of an identical capacitor in a vacuum, the dielectric constant, symbolized by the Greek letter kappa, , is simply expressed as

Question 22 :
Two identical positive charges are 0.6 meters apart. Which of the following is true about the electric field and potential at the point which is directly in-between the two?

Question 23 :
Two charges $+q$ and $-q$ are kept apart. Then at any point on the right bisector of line joining the two charges

Question 24 :
A solid copper sphere has a charge of $+Q$&#160;on it. Identify the correct statement about the charge distribution of solid sphere?

Question 25 :
A capacitor having capacity of $2.0\mu F$ is charged to $200\ V$ and then the plates of the capacitors are connected to a resistance wire. The heat produced in joule will be :

Question 26 :
The capacity of a parallel plate capacitor with no dielectric substance but with a separation of $0.4cm$ is $2\mu F$. If the separation is reduced to half and it is filled with a dielectric substance of value $2.8$, then the final capacity of the capacitor is

Question 28 :
Fill in the blank:<br/>In order to increase the capacity of a parallel plate condenser, &#160;one should introduce&#160;a sheet of&#160; $\underline{\hspace{0.5in}}$&#160;between the plates (assume that the space is completely filled).

Question 29 :
The value of the static dielectric constant of any material is always&#160;

Question 32 :
A parallel plate capacitor is charged an then disconnected from the charging battery. If the plates are now movedfarther apart by pulling at them by means of insulating handles, then

Question 33 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p>The work done in carrying $20$ coulomb charge through a distance of $5$ m is $2J$. The potential difference between these two points will be:</p>

Question 35 :
What is the potential differences across a 64.0 microfarad capacitor if the charge on the positive plate is +16.0 micro coulombs?

Question 36 :
Two parallel plate air capacitors have the same separation. The plates of the first are squares of side 10 cm. The plates of the second are squares of side 20 cm. The ratio of their capacitance is :

Question 37 :
The potential difference between the two plates of a parallel plate capacitor is constant. When air between the plates is replaced by dielectric material, the electric field intensity :<br/>

Question 38 :
Two place of a parallel plate capacitor of capacity $ 50 \mu F $ are charged by a battery to a potential of 100 V. The battery remains connected and the place are separated from each other so that the distance between them is doubled. The energy spent by the battery in doing so, will be :

Question 39 :
<p class="wysiwyg-text-align-left"><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">Two condensers of capacities $10 \mu F$<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"> and $20 \mu F$&#160;have potential differences of 20V and 10V&#160;respectively. The total charge is</p>

Question 40 :
A parallel-plate capacitor is charged from a cell and then disconnected from the cell. The separation between the plates is now doubled.

Question 41 :
Two capacitors of capacity $C_{1}$ and $C_{2}$ are connected in parallel, then the equivalent capacity is:

Question 42 :
The gap between the plates of a parallel plate capacitor of area $A$and distance between plates $d$, is filled with a dielectric whose permittivity varies linearly from $\epsilon_1$ at one plate to $\epsilon_2$ at the other. The capacitance of capacitor is :