Capacitors and Dielectrics Nootan Solutions ISC Physics Class-12 Nageen Prakashan Chapter-4 Solved Numericals. Step by step Solutions of Kumar and Mittal ISC Physics Class-12 Nageen Prakashan Numerical Questions. Visit official Website CISCE for detail information about ISC Board Class-12 Physics
Capacitors and Dielectrics Nootan Solutions ISC Physics Class-12 Nageen Prakashan Chapter-4 Solved Numericals of Kumar and Mittal
| Class: | 12 |
| Subject: | Physics |
| Chapter 3: | Capacitors and Dielectrics |
| Board | ISC |
| Writer /Publications | Nootan / Nageen Prakashan / Kumar and Mittal |
| Topics | Solved Numericals of page 163 , 164,165, 166 |
What is a Capacitor?
The capacitor is a device in which electrical energy can be stored. It is an arrangement of two-conductor generally carrying charges of equal magnitudes and opposite sign and separated by an insulating medium. The non-conductive region can either be an electric insulator or vacuum such as glass, paper, air or semi-conductor called as a dielectric.
Capacitor vary in shape and size, they have many important applications in electronics.
What are Capacitors Used For?
- Storing electric potential energy such as batteries.
- Filtering out unwanted frequency signals
- Delaying voltage changes when coupled with resistors.
- Used as a sensing device.
- Also Used in the audio system of the vehicle.
- and Used to separate AC and DC.
Charge on Capacitor
Note: Charge on the capacitor is Q.
Total charge/ the net charge on the capacitor is –Q + Q = 0.
Capacitance
The charge on the capacitor (Q) is directly proportional to the potential difference (V) between the plates i.e. Q\alpha V or Q = CV
The constant of proportionality (C) is termed as the capacitance of the capacitor.
Dimensional Formula and Unit of Capacitance
- Unit of Capacitance: Farad (F)
The capacitor value can vary from a fraction of pico-farad to more than a micro Farad. Voltage level can range from a couple to a substantial couple of hundred thousand volts
Factors Affecting the Capacitance
Capacitance depends on the following factor:
- Shape and size of the conductor
- Medium between them
- Presence of other conductors near it.
Calculation of Capacitance
We will try to calculate the capacitance of differently shaped capacitors, the steps are followed;
- Assume the charge on the conductors(Q)
- Calculate the electric field between the plates (E)
- Calculate potential difference from electric field(V)
Types of Capacitor
- Parallel Plate Capacitor
- Spherical capacitor
- Cylindrical capacitor
Solved Numericals of Capacitors and Dielectrics Nootan Solutions, Nageen Prakashan Kumar and Mittal
( Page – 163 )
Question 1
A Capacitor …………………the Capacitor .
Answer
Question 2
The Capacitor ………………… diameter ?
Answer
( Page -164 )
Question 3
A PD ………………..each plate .
Answer
Question 4
What distance………………….a = 0.5 m ?
Answer
Question 5
An air …………………………..Capacitor ?
Answer
Question 6
The area …………………constant .
Answer
Question 7
How much ……………………….0.025 mm ?
Answer
Question 8
We have ……………….Capacitance ?
Answer
Question 9
The potential ……………… same Charge ?
Answer
Question 10
A paper……………………….Capacitor ?
Answer
Question 11
When a ……………………..Capacitor ?
Answer
Question 12
(a) A parallel …………………… find .
(i)…………….
(ii)…………….
(iii)……………..
(b)………………
Answer
Question 13
(a) A parallel …………………to 400 V .
(b) ……………………..
Answer
Question 14
A parallel …………..stored energy ?
Answer
Question 15
A 16 …………………plates ?
Answer
Question 16
A 6 ……………………….energy .
Answer
Question 17
The capacitance …………….. …..energy – change .
Answer
Question 18
The capacitance……………………neglected .
Answer
Question 19
Three equal …………….series . find
(a)…………
(b)……………
Answer
Question 20
Three capacitors ……………………..100 V supply .
Answer
Question 21
Two capacitors……………………………..Capacitance ?
Answer
( Page -165 )
Question 22
How and ………………..of 75 microC .
Answer
Question 23
We have ………………..them ?
Answer
Question 24
Three equal ………………………..series ?
Answer
Question 25
Two parallel ……………………….capacitors .
Answer
Question 26
A 0.2 ……………………………… Potential ?
Answer
Question 27
A 80 ………………………….capacitor .
Answer
Question 28
Two capacitor ……………………..find .
(i)…………………….
(ii)……………………
Answer
Question 29
A 2 ……………………..in it ?
Answer
Question 30
Three are …………………….stored .
Answer
Question 31
Four capacitor…………………capacitor ?
Answer
Question 32
A potential ……………………capacitors .
Answer
Question 33
Two capacitors………………………..capacitor ?
Answer
Question 34
Two capacitors ………………………… capacitor .
Answer
Question 35
A 600 pF …………………….energy go ?
Answer
Question 36
A 4……………………….. radiation ?
Answer
Question 37
A 100 pF …………………to it ?
Answer
Question 38
An electronic ……………………… in a flash ?
Answer
Question 39
Three …………………….. combination .
Answer
Question 40
In the given ………….each capacitor .
Answer
( Page – 166 )
Question 41
Calculate ………………………..is 30 …………. .
Answer
Question 42
Calculate ……………………….combination .
Answer
Question 43
In the given …………………….. capacitance .
Answer
Question 44
Calculate …………………………… closest to ?
Answer
Question 45
Find the ……………………… given circuit .
Answer
Question 46
Four capacitors ……………..A and C ?
Answer
Question 47
A parallel plate ……………………….Capacitance ………….. .
Answer
Question 48
As shown in ……………………… Capacitance ?
Answer
Question 49
In a camera – flash …………………………..of the flash .
Answer
— End of Capacitors and Dielectrics Nootan Solutions of Numericals :–
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