12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A
Published on: 13/10/2020
12th Standard Physics Electrostatics English Medium Free Online Test One Mark questions 2020 - 2021
Download Tamil Nadu 12th Standard Physics question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Physics Test1.
When an electric dipole of dipole moment p is aligned parallel to the electric field E then the potential energy of the dipole is given as _________.
pE
zero
-pE
\(\frac{pE}{\sqrt{2}}\)
2.
The torque (\(\tau \)) experienced by an electric dipole placed in a uniform electric field (E) at an angle θ with the field is
pEcosθ
pE cosθ
pE sinθ
2pE sinθ
3.
Two point charges +q and -q are placed at points A and B respectively separated by a small distance. The electric field intensity at the midpoint O of AB :
is zero
acts along AB
acts along BA
acts perpendicular to AB
4.
Which one of the following relation is correct?
V = \(\frac{q}{C}\)
C = q tan q
V = qC
\(\frac{V}{C}\)
5.
The force between two charges at a particular distance in air is 36 N. If the distance between the charges is filled by a medium of dielectric constant 6, then the force is:
216 N
6 N
30 N
24 N
6.
Which instrument was used to demonstrate the electrostatic shielding?
Lightning arrester
Van de graaff generator
Faraday cage
Gold leaf electroscope
7.
Find the electric field at x = 5m from the graph.
2 V/m
-2.5 V/m
2/5 V/m
-2/5 V/m
8.
A charge q is placed at the centre of a cubical box of side with top open. The flux of electric field through the surface of the cubical box is
Zero
\(\frac { q }{ { \varepsilon }_{ 0 } } \)
\(\frac { q }{ 6{ \varepsilon }_{ 0 } } \)
\(\\ \frac { 5q }{ 6{ \varepsilon }_{ 0 } } \)
9.
A condenser of 2μF capacitance is charged steadily from 0 to 5 coulomb. Which of the following graphs correctly represents the variation of potential difference across its plates with respect to the charge on the condensor [Q = C V ]
10.
One Joule per Coulomb is called
Gauss
ampere
farad
volt
11.
Two identical metal balls with charges +2Q and -Q are separated by some distance and exerts a force F on each other. They are joined by a conducting wire, which is then removed. The force between them will now.
F/8
F/12
F
F/4
12.
In tuning radio we use,
capacitors
transistors
diodes
LEDS
13.
In the given cricuit the effective capacitance between A and B will be
3μf
\(\frac{36}{13}\) μf
13μf
7μf
14.
The unit for electric flux is
C2N-1m-2
Nm2C-2
Nm2C-1
Nm-2C-1
15.
The expression for the electric field due to a surface of total charge 'Q' is given by __________
\(\overset { \rightarrow }{ E } =\frac { 1 }{ 4\pi { \varepsilon }_{ 0 } } \int { \frac { \sigma dA }{ { r }^{ 2 } } } \hat { r } \)
\(\overset { \rightarrow }{ E } =\frac { 1 }{ 4\pi { \varepsilon }_{ 0 } } \int { \frac { \rho dA }{ { r }^{ 2 } } } \hat { r } \)
\(\overset { \rightarrow }{ E } =\frac { 1 }{ 4\pi { \varepsilon }_{ 0 } } \int { \frac { \lambda dl }{ { r }^{ 2 } } } \hat { r } \)
\(\overset { \rightarrow }{ E } =\frac { 1 }{ 4\pi { \varepsilon }_{ 0 } } \int { \frac { dq }{ { r }^{ 2 } } } \hat { r } \)
16.
The electric field created by a _________ is basically a non-uniform electric field.
Test charge
Positive charge
Negative charge
Point charge
17.
In a hydrogen atom the electron revolves around the proton in an orbit of 0.53 \(\mathring { A } \). The potential produced by the electron on the nuleus is ___________
6.8 V
13.6 V
54.4 V
27.2 V
18.
Three capacitors are connected in triangle as shown in the figure. The equivalent capacitance between the points A and C is
1μF
2μF
3μF
\(\frac{1}{4}\)μF
19.
.JPG)
.JPG)
.JPG)
.JPG)
20.
Which charge configuration produces a uniform electric field?
point charge
uniformly charged infinite line
uniformly charged infinite plane
uniformly charged spherical shell
1.
(c)
-pE
2.
(c)
pE sinθ
3.
(b)
acts along AB
4.
(a)
V = \(\frac{q}{C}\)
5.
(b)
6 N
6.
(c)
Faraday cage
7.
(a)
2 V/m
8.
(d)
\(\\ \frac { 5q }{ 6{ \varepsilon }_{ 0 } } \)
9.
(a)
10.
(d)
volt
11.
(a)
F/8
12.
(a)
capacitors
13.
(a)
3μf
14.
(c)
Nm2C-1
15.
(a)
\(\overset { \rightarrow }{ E } =\frac { 1 }{ 4\pi { \varepsilon }_{ 0 } } \int { \frac { \sigma dA }{ { r }^{ 2 } } } \hat { r } \)
16.
(d)
Point charge
17.
(d)
27.2 V
18.
\(\frac{1}{C_s}=\frac{1}{2}+\frac{1}{2}=1 \ μF\)
Cp = 1 + 1 = 2 μF
19.
(b)
20.
(c)
uniformly charged infinite plane
12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications களப்பெயர் முறைமை (DNS) Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications வலையமைப்பு எடுத்துக்காட்டுகள் மற்றும் நெறிமுறைகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications கணினி வலையமைப்பு ஓர் அறிமுகம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications PHP-உடன் MySQL-ஐ இணைத்தல் Sample Question Papers Study Material - QB365 Set A
Tamilnadu Stateboard 12th Standard Subjects
Maths
Chemistry
Physics
Biology
Computer Science
Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
Computer Applications
Computer Science
Business Maths and Statistics
Commerce
Economics
Maths
Chemistry
Physics
Computer Technology
History
Accountancy
Tamil
English
French
Tamilnadu Stateboard Standards
