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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 Four
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 small piece of wire bent into an L shape with an upright and horizontal portion of equal length, is placed with the horizontal portion along the axis of the concave mirror whose radius of curvature is 10 cm. If the bend is 20 cm from the pole of the mirror, then the ratio of lengths of the image of the upright and horizontal position of the wire is _____________.
1: 2
3: 1
1: 3
2: 1
2.
It is desired to photograph the image of an object placed at a distance of 3m from the plane mirror. The camera which is at a distance of 4.5 m from the mirror should be focused for a distance of ___________.
3 m
4.5 m
6 m
7.5 m
3.
Which phenomenon supports that matter has a wave nature?
electron momentum
electron diffraction
photon momentum
photon diffraction
4.
In an N-P-N transistor circuit, the emitter, collector, and base current are respectively IE, IC, and lB. The relation between them is _____________.
IC
IB
IB > IC > IE
IB > IC > IE
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.
_________ spectra are used for making dyes
continuous emission
band emission
band absorption
line spectra
7.
Accelerated charges would produce _____________.
sound waves
૪-rays
magnetic waves
electromagnetic waves
8.
The expression for water equivalent is _____________.
W = H (θ2,θ1)
W = \(\frac { { \theta }_{ 2 }-{ \theta }_{ 1 } }{ H } \)
both (a) and (b)
W = \(\frac { H }{ { \theta }_{ 2 }-{ \theta }_{ 1 } } \)
9.
For an ideal transformer __________
EpIp = EsIs
EpEs = Ip
EpEs = Is
IpIs = EsIs
10.
The magnitude of torque on dipole is maximum if
θ = 0o
θ = 90o
θ = 180o
θ = 270o
1.
(b)
3: 1
2.
(d)
7.5 m
3.
(b)
electron diffraction
4.
(b)
IB
5.
(c)
characteristic spectrum
6.
(c)
band absorption
7.
(d)
electromagnetic waves
8.
(d)
W = \(\frac { H }{ { \theta }_{ 2 }-{ \theta }_{ 1 } } \)
9.
(a)
EpIp = EsIs
10.
(b)
θ = 90o
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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
Tamil
English
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