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TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A
Published on: 27/06/2019
New syllabus creative multiple choice questions physics
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.
Charge per unit volume is called _____________
Linear charge density (λ)
Surface charge density (σ)
Volume charge density (ρ)
Electric flux
2.
Four plates each of area N and inferplate separation 'd' are placed as shown in figure. The two inner plates are connected to the point 'B' and outer to point 'A'. What is equivalent capacitance?
\(\frac { { \varepsilon }_{ 0 }A }{ d } \\ \)
\(\frac { {2 \varepsilon }_{ 0 }A }{ d } \\ \)
\(\frac { {3 \varepsilon }_{ 0 }A }{ d } \\ \)
\(\frac { {4 \varepsilon }_{ 0 }A }{ d } \\ \)
3.
A positively charged body 'A' has been brought near a brass cylinder 'B' mounted on a glass stand as shown in the figure. The potential of 'B' will be
zero
Negative
positive
Infinite
4.
Increasing the charge on the plates of a capacitor means ___________
increasing the capacitance
increasing the potential difference between the plates
both (a) and (b) above
none of the above
5.
A condenser is charged to a potential of 200V and has a charge of 0.1C. The energy stored in it is _____________
1 J
2 J
10 J
20 J
6.
What will happen if two conducting spheres are separately charged and then brought in contact?
Total charge on the two spheres is conserved
The total energy is conserved
Both charge and energy are conserved
The final potential is the mean of the original potentials.
7.
Two condensers (capacitors) of capacity C1 and C2 are connected in parallel. A charge Q given to then is shared. The ratio of the charges Q is _________
\(\frac { { C }_{ 2 } }{ { C }_{ 1 } } \)
\(\frac { { C }_{ 1 } }{ { C }_{ 2 } } \)
C1.C2
\(\frac { 1 }{ { C }_{ 1 }\times { C }_{ 2 } } \)
8.
The electric potential V as a function of distance x (metres) is given by V = ( 5x2 + 10x -9) volt. The value of electric field at a point x = 1m is __________
20 Vm-1
6 Vm-1
11 Vm-1
-23 Vm-1
9.
The electric field created by a _________ is basically a non-uniform electric field.
Test charge
Positive charge
Negative charge
Point charge
10.
Which one of these is a vector quantity?
Electric charge
Electric field
Electric flux
Electric potential
11.
The expression for electric field in vector form is
\(\frac { 1 }{ 4\pi { \varepsilon }_{ 0 } } \frac { q }{ r } \hat { r } \)
\(\frac { -1 }{ 4\pi { \varepsilon }_{ 0 } } \frac { q }{ r } \hat { r } \)
\(\frac { -1 }{ 4\pi { \varepsilon }_{ 0 } } \frac { q }{ r^2 } \hat { r } \)
\(\frac { 1 }{ 4\pi { \varepsilon }_{ 0 } } \frac { q }{ r^2 } \hat { r } \)
12.
The force experienced by a unit charge is called ____________
Electric potential
Electric flux
Electric field
Static electricity
13.
The concept of 'Field' was introduced by ___________
Faraday
Gauss
Maxwell
None
14.
A force of 40 N is acting between two charges in air if the space between then is filled with glass εr = 8. Then the force between then is __________
20 N
10 N
5 N
the same and does not change
15.
Eight mercury droplets having a radius of 1 mm and charge of 0.066 PC each merge to form one droplet. Its potential is _____________
2.4 V
1.2 V
3.6 V
4.8 V
16.
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
17.
An isolated metal sphere of radius 'r' is given a charge' q'. The potential energy of the sphere is ____________
\(\frac { { q }^{ 2 } }{ 4\pi { \varepsilon }_{ 0 }r } \)
\(\frac { { q }^{ } }{ 4\pi { \varepsilon }_{ 0 }r } \)
\(\frac { { q }^{ } }{ 8\pi { \varepsilon }_{ 0 }r } \)
\(\frac { { q }^{ 2 } }{ 8\pi { \varepsilon }_{ 0 }r } \)
18.
An uncharged metal sphere is placed between two equal and oppositely charged metal plates. The nature of lines of force will be ______________
19.
The given figure is a plot of lines of force due to two charges q1 & q2 find out the sign of charges
both negative
both positive
upper positive and lower negative
upper negative and lower positive
20.
The figure shows tow parallel equipotential surface A and B kept at a small distance 'r' a part from each other. A point change of Q coulomb is taken from the surface A to B. The amount of net work done will be
\(W=\frac { -1 }{ 4\pi { \varepsilon }_{ 0 }r } \frac { q }{ r } \)
\(W=\frac { 1 }{ 4\pi { \varepsilon }_{ 0 }r } \frac { q }{ r } \)
\(W=\frac { -1 }{ 4\pi { \varepsilon }_{ 0 }r } \frac { q }{ r^2 } \)
zero
1.
(c)
Volume charge density (ρ)
2.
(b)
\(\frac { {2 \varepsilon }_{ 0 }A }{ d } \\ \)
3.
(c)
positive
4.
(b)
increasing the potential difference between the plates
5.
(c)
10 J
6.
(a)
Total charge on the two spheres is conserved
7.
(b)
\(\frac { { C }_{ 1 } }{ { C }_{ 2 } } \)
8.
(a)
20 Vm-1
9.
(d)
Point charge
10.
(b)
Electric field
11.
(d)
\(\frac { 1 }{ 4\pi { \varepsilon }_{ 0 } } \frac { q }{ r^2 } \hat { r } \)
12.
(c)
Electric field
13.
(c)
Maxwell
14.
(c)
5 N
15.
(a)
2.4 V
16.
(d)
27.2 V
17.
(a)
\(\frac { { q }^{ 2 } }{ 4\pi { \varepsilon }_{ 0 }r } \)
18.
(b)
19.
(a)
both negative
20.
(d)
zero
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Tamilnadu Stateboard 12th Standard Subjects
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Physics
Biology
Computer Science
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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
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