12th Standard Syllabus & Materials
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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 மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் 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: 12/10/2020
12th Standard Physics English Medium Free Online Test Creative 1 Mark questions
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.
Two plane mirrors are at right angles to each other. A man stands between them and combs hair with his right hand. In how many of the images will he be seen using his right-hand __________.
None
1
2
3
2.
A man is 180 cm tall and his eyes are 10 cm below the top of his head. In order to see his entire height right from toe to head, he uses a plane mirror kept at a distance of 1m from him. The minimum length of the plane mirror required is _____________.
180 cm
90 cm
85 cm
170 cm
3.
Chinese scientists have created the world's first autonomous _________ to combat caner tumours.
RNA Robot
DNA Robot
m RNA Robot
r RNA Robot
4.
A geostationary satellite completes one revolution in________.
50 min
50 days
366 days
24 hours
5.
Resting frequency - 97 MHz. When modulated, it becomes 97.005 MHz. Find its carrier swing.
10 kHz
10 MHz
1MHz
50MHz
6.
The forbidden energy gap is largest in ______________.
conductor
metals
semiconductor
insulators
7.
______ theory explains photo electric effect.
Electromagnetic
Quantum
Wave
Corpuscular
8.
The device which is a combination of a receiver and a transmitter is ___________________.
Amplifier
Repeater
Transducer
Modulator
9.
At 0 k temp, a N - type semi conductor ______________.
Does not haveany charge carriers
Has few holes but no free electrons
Few holes and few electrons
Has equal number of holes and electrons
10.
A photon of energy hv is absorbed by a free electrons of a metal having work function ф < hv _____________.
The electron is sure to come out
The electron is sure to come out with a kinetic energy ф < hv
Either the electron does not come out or it comes out with kinetic energy hv - ф
It may come out with a kinetic energy less than hv - ф
11.
The minimum wavelength of X-rays produced in an X-ray tube at 1000 kV is ________________.
0.0124 Å
0.124 Å
1.24 Å
0.00124 Å
12.
Which of the following is a special aspect of EM wave?
can be deflected by electric field
can be deflected by magnetic filed
can be deflected by both electric & magnetic filed
none of these
13.
No current flows between two charged particles when connected if they have same ______
capcity
potential
charge
none of these
14.
At the junction of an electric circuit the accumulation of charges is _______
positive maximum
negative maximum
zero
moderate
15.
The period of revolution of a charged particle inside a cyclotron does not depend on __________________.
the magnetic induction
the charge of the particle
the velocity of the particle
the mass of the particle
16.
The voltage drop across the resistor in a LCR series circuit is __________________
VR = IR
VR = IR2
VR = I/R
VR=R/I
17.
Cyclotron is used to _______________.
accelerate charged particles or ions to low voltages
decelerate charged particles or ions to high voltages
accelerate charged particles or ions to high energies
accelerate charged particles or ions to high voltages
18.
In a single phase dynamo, the direction of the induced current is given by __________
Faraday's laws
Maxwell's equations
Einstein's equation
Fleming's right hand rule
19.
The most suitable metal for permanent magnet is ______________.
copper
aluminium
steel
iron
20.
Transformer works on _____________.
AC only
DC only
both AC and DC
AC more effectively than DC
21.
In an electrical arrangement as shown the equivalent resistance between X and Y will be
\(158.75\Omega \)
\(118.75\Omega \)
\(218.75\Omega \)
\(318.75\Omega \)
22.
Which of the following has negative temperature coefficient of resistance?
copper
tungsten
carbon
silver
23.
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 ]
24.
The expression for electric field in vector form is
\(\frac { 1 }{ 4\pi { \varepsilon }_{ 0 } } \frac { q }{ r } \hat { r } \)
\(\frac { -1 }{ 4\pi { \varepsilon }_{ 0 } } \frac { q }{ r } \hat { r } \)
\(\frac { -1 }{ 4\pi { \varepsilon }_{ 0 } } \frac { q }{ r^2 } \hat { r } \)
\(\frac { 1 }{ 4\pi { \varepsilon }_{ 0 } } \frac { q }{ r^2 } \hat { r } \)
25.
The relative permittivity of water is _______.
εr = 70
εr = 75
εr = 80
εr = 85
1.
(a)
None
2.
(a)
180 cm
3.
(b)
DNA Robot
4.
(d)
24 hours
5.
(a)
10 kHz
6.
(d)
insulators
7.
(b)
Quantum
8.
(b)
Repeater
9.
(a)
Does not haveany charge carriers
10.
(d)
It may come out with a kinetic energy less than hv - ф
11.
(b)
0.124 Å
12.
(d)
none of these
13.
(b)
potential
14.
(c)
zero
15.
(c)
the velocity of the particle
16.
(a)
VR = IR
17.
(c)
accelerate charged particles or ions to high energies
18.
(d)
Fleming's right hand rule
19.
(c)
steel
20.
(a)
AC only
21.
(b)
\(118.75\Omega \)
22.
(c)
carbon
23.
(a)
24.
(d)
\(\frac { 1 }{ 4\pi { \varepsilon }_{ 0 } } \frac { q }{ r^2 } \hat { r } \)
25.
(c)
εr = 80
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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
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English
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