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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 Five
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.
Which of the following forms a virtual and erect image for all positions of the object?
Convex lens
Concave lens
Convex mirror
both b & c
2.
The de Broglie wavelength of electron accelerated with a potential V is ________
\(\lambda =\frac { h }{ \sqrt { Vem } } \)
\(\lambda =\frac { h }{ \sqrt { 2Vem } } \)
\(\lambda =\frac { h }{ m\sqrt { 2Vem } } \)
\(\lambda =\frac { h }{ m\sqrt { \frac { Ve }{ m } } } \)
3.
Bulk particles of nanoparticles are synthesized by ___________
Top - down approach
Bottom - up approach
Top - top approach
Bottom - real approach
4.
Basic logic gates are _______
NOT, AND, OR
NOR, AND, OR
NAND, AND, OR
NAND, NOR, NOT
5.
The ability to amplify weak signals is called ________.
transmission
sensitivity
reception
resolution
6.
The frequency of output signal of LC oscillator circuit is 100 Hz with capacitance value 0.1μF. IF value of capacitance is taken as 0.2 μF, the frequency of output signal ______.
decreases by \(\frac{1}{\sqrt2}\)
increases by \(\frac{1}{\sqrt2}\)
decreases by \(\frac12\)
increases by \(\frac12\)
7.
Sodium and copper have work functions of 2.3eV and 4.5eV respectively, then the ratio of the wavelengths is nearest to ___________.
1: 2
4: 1
2: 1
1: 4
8.
Graphite is used as a __________ in nuclear reactors.
moderator
coolant
detector
fuel
9.
In RLC series AC circuit at resonance __________.
Resistance is zero
Net reactance is zero
impedance is maximum
voltage leads the current by a phase angle \(\frac{ㅠ}{2}\)
10.
What physical quantities may X and Y represent? [Y represents the first mentioned quantity].
K.E - velocity of a particle
pressure - temperature of a given gas (constant volume)
capacitance - charge to give a constant potential
potential - capacitance to give a constant charge
1.
(d)
both b & c
2.
(b)
\(\lambda =\frac { h }{ \sqrt { 2Vem } } \)
3.
(a)
Top - down approach
4.
(a)
NOT, AND, OR
5.
(b)
sensitivity
6.
\(\mathrm{f} \propto \frac{1}{\sqrt{\mathrm{C}}} \Rightarrow \frac{\mathrm{f}_2}{\mathrm{f}_1}=\sqrt{\frac{\mathrm{C}_1}{\mathrm{C}_2}}=\sqrt{\frac{0.1}{0.2}}\)
\(\therefore \mathrm{f}_2=\frac{1}{\sqrt{2}} \mathrm{f}_1\)
7.
(c)
2: 1
8.
(a)
moderator
9.
(b)
Net reactance is zero
10.
(d)
potential - capacitance to give a constant charge
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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
French
Tamilnadu Stateboard Standards
