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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
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Published on: 12/10/2020
12th Standard Physics English Medium Free Online Test Creative One Mark questions with Answer Key Part Three
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.
A point object 0 is placed between two plane mirrors as shown in figure. The distance by mirror M2 from it are _____________.
2 mm, 8 mm, 18 mm
2 mm, 18 mm, 28 mm
2 mm, 18 mm, 22 mm
2 mm, 18 mm, 58 mm
2.
The waves that are bent down by the ionosphere on are _______________.
ground waves
surface waves
space waves
skywaves
3.
How will you increase the resistivity of Ge semi conductor?
on adding donar impurity
on adding acceptor impurity
on making UV light incident on Ge crystal
on decreasing the temperature
4.
Which statement is incorrect regarding for p-n junction?
Donor atoms are depleted of their holes in junction
No net charge exists far from junction
Barrier potential VB is generated
Energy VB is to be surrounted before any charge can flow across junction
5.
The fig. represents the observed intensity of X-rays emitted by an X-ray tube as a function of wavelength. The sharp peaks A and B denote ____________.
continuous spectrum
band spectrum
characteristic spectrum
white radiations
6.
Electromagnetic waves are discovered by _______________.
Hertz
Maxwell
Lenz
Huygens
7.
Which one of the following represents current magnetic field lines?
8.
If a secondary coil has 40 turns, and a primary coil with 20 turns is charged with 50V of potential difference, then potential difference in secondary would be ________________.
50 V
25 V
60 V
100 V
9.
When a current of 5 A flows through a conductor of resistance 3 \(\Omega \) the loss of power due to joule heating effect is_________
75 W
25 W
70.7 W
45 W
10.
Electric field intensity and electric potential are related by_________.
E = -\(\frac{dV}{dt}\)
E = -\(\frac{dV}{dx}\)
E = \(\frac{dV}{dt}\)
E = \(\frac{-dx}{dV}\)
1.
(c)
2 mm, 18 mm, 22 mm
2.
(a)
ground waves
3.
(d)
on decreasing the temperature
4.
(d)
Energy VB is to be surrounted before any charge can flow across junction
5.
(c)
characteristic spectrum
6.
(b)
Maxwell
7.
(d)
8.
(d)
100 V
9.
(a)
75 W
10.
(b)
E = -\(\frac{dV}{dx}\)
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Tamilnadu Stateboard 12th Standard Subjects
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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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