Summary 12th physics que bank science

महाराष्ट्र शासन
द.ु क्र ०२०२४४७६९३८ शालेय शिक्षण व क्रीडा विभाग
Email- राज्य शैक्षणिक संशोधन व प्रशिक्षण परिषद,महाराष्ट्र
७०८ सदाशिव पेठ, कुमठे कर मार्ग, पणु े ४११०३०.




प्रश्नपेढी (Question Bank) 2023

इयत्ता:- बारावी

माध्यम:- इंग्रजी

विषय:- भौतिकशास्त्र (Physics)




सच
ू ना-


1.सदर प्रश्नपेढी ही १००% अभ्यासक्रमावर तयार करण्यात आली आहे .

2.सदर प्रश्नपेढीतील प्रश्न हे अधिकच्या सरावासाठी असन ू प्रश्नसंचातील प्रश्न
बोर्डाच्या प्रश्नपत्रिकेत येतीलच असे नाही, याची नोंद घ्यावी.

, Subject -PHYSICS (54)

INDEX

Sr. No. Name of Chapter Page no.
1. Rotational Dynamics 3
2. Mechanical Properties of fluids 7
3. Kinetic Theory of gasses and Radiation 10




E
4. Thermodynamics 13
5. Oscillations 17




N
6. Superposition of Waves 20




U
7. Wave Optics 24
8. Electrostatics 28
9.
,P Current Electricity 32
10. Magnetic Field Due to Electric Current 36
TM

11. Magnetic materials 40
12. Electromagnetic Induction 44
13. A.C Circuits 47
ER


14. Dual Nature of Radiation and Matter 51
15. Structure of Atoms and Nuclei 54
16. Semiconductors Devices 59
SC




2

, Chapter1. Rotational Dynamics
MCQ’s ( 1 Mark Each)
1. A diver in a swimming pool bends his head before diving. It
a) Increases his linear velocity
b) Decreases his angular velocity
c) Increases his moment of inertia
d) Decreases his moment of inertia
Ans: d) Decreases his moment of inertia




E
2. The angular momentum of a system of particles is conserved
a) When no external force acts upon the system




N
b) When no external torque acts upon the system
c) When no external impulse acts upon the system




U
d) When axis of rotation remains the same
Ans: b) When no external torque acts upon the system
,P
3. A stone is tied to one end of a string. Holding the other end, the string is whirled in a
TM

horizontal plane with progressively increasing speed. It breaks at some speed because
a) Gravitational forces of the earth is greater than the tension in string
b) The required centripetal force is greater than the tension sustained by the string
c) The required centripetal force is lesser than the tension in the string
ER



d) The centripetal force is greater than the weight of the stone

Ans: b) The required centripetal force is greater than the tension sustained by the
string
SC




4. The moment of inertia of a circular loop of radius R, at a distance of R/2 around a rotating
axis parallel to horizontal diameter of the loop is
a) ½ MR2
b) ¾ MR2
c) MR2
d) 2 MR2
Ans: b) ¾ MR2




3

, 5. A 500 kg car takes a round turn of radius 50m with a velocity of 36 km/hr. The centripetal
force is
a) 250N
b) 750N
c) 1000N
d) 1200N
Ans: c) 1000N


6. A cyclist riding a bicycle at a speed of 14 3 m/s takes a turn around a circular road of




E
radius 20 3 m without skidding. Given g = 9.8 m/s2, what is his inclination to the vertical
a) 300




N
b) 450
c) 600



U
d) 900
Ans: c) 600
,P
7. A string of length ℓ fixed at one end carries a mass m at the other. The string makes 2/π
TM

revolutions/sec around the vertical axis through the fixed end. The tension in the string is
a) 2 ml
b) 4 ml
c) 8 ml
ER



d) 16 ml
Ans: d) 16 ml
SC




Very Short Answer (VSA) (1 MARK Each)
1. Find the radius of gyration of a uniform disc about an axis perpendicular to its plane and
passing through its center.
2. Does the angle of banking depend on the mass of the vehicle?
3. During ice ballet, while in the outer rounds, why do the dancers outstretch their arms and
legs.
4. State the principle of conservation of angular momentum.
5. Two bodies have their moments of inertia I and 2I respectively about their axis of
rotation. If their kinetic energies of rotation are equal, then what is the ratio of their
angular velocity.

4