Maharashtra Board Class 12th Physics Important Objective Question for 2024

महाराष्ट्र बोर्ड इंटरमिजिएट परीक्षा 2024 मध्ये विचारले जाणारे महत्त्वाचे भौतिकशास्त्राचे प्रश्न येथे आहेत, इयत्ता 12वीच्या भौतिकशास्त्राच्या परीक्षेसाठी 39 महत्त्वाचे प्रश्न. जर तुम्ही इंटरमिजिएट परीक्षेला बसत असाल आणि तुमचा विषय भौतिकशास्त्र असेल तर दिलेले सर्व प्रश्न काळजीपूर्वक वाचा.

CIRCULAR MOTION Class 12th Physics Important Objective Question 2024

Results

#1. 1) In a uniform circular motion, the direction of linear velocity is along the

a) Tangent to the curve path

b) Radius vector towards the centre

c) Perpendicular to the plane of the circular

d) Radius vector

#2. ) A satellite of the earth is revolving round the earth with a uniform speed ‘v’. If the gravitational force suddenly disappears, the satellite will

a) Continue to move with the velocity v along the

b) Move with a velocity v, tangentially to the

c) Fall down with increasing velocity

d) Ultimately come to rest somewhere on the

#3. For a particle performing UCM, the physical quantities are constant

a) Speed and angular velocity

b) Kinetic energy and radius vector

c) Angular velocity and Kinetic energy

d) ‘a’ and ‘c’

#4. In a uniform circular motion, the velocity, position vector and angular velocity are

a) Parallel to each other

b) Mutually perpendicular to each other

They are co-planer

d) The angle between then 45

#5. Angle between radius vector and centripetal acceleration is

pii

c) 2 c

d) None of these

#6. A particle is moving in a uniform circular motion with radius ‘r’, in half revolution the displacement

a) 2 , 2

b) 1.414 r, 3.142r

c) 2 , r r

r r

#7. The ratio of the frequencies of rotation of the hour hand of a clock and the Earth is

a) 1: 12

b) 1: 2

c) 2:1

d) 12 : 1

#8. The ratio of the angular speed of the minute hand of a clock to that of its hour hand is

3600 : 1

b) 60 : 1

c) 24 : 1

d) 12 : 1

#9. Which of the following quantities are constant for a body performing UCM?

a) The linear and angular velocities.

b) The linear speed and the acceleration

c) The linear velocity and the acceleration

d) The linear speed and the angular velocity

#10. The angular speed of the wheels of a bicycle is 8π rad/s. Their period of rotation is

0.25

b) 0.4 s

pii

#11. A particle describes a circular path of disameter 20 m every 2s. the average angular speed of the

rad s

rad c

5 / rad s

rad/s

#12. A car goes round a circular track of radius 50m with a speed of 25 m/s. its angular speed is

0.5 rad/s

2 rad/s

5 rad/s

1250 rad/s

#13. A belt passes over a wheel of radius 25 cm. if a point on the belt has a speed of 5 m/s, the belt is moving with an angular velocity of

3.2 rad/s

b) 0.32 rad/s

c) 20 rad/s

d) 0.032 rad/s

#14. A bicycle wheel, 80 cm in diameter, is rotating at 120 rpm. The linear speed of the midpoint of a spoke is

a) 80 / m s

b) 8.0 /

c) 0.80 /

d) 0.80 /

#15. A particles moves in a circular path of radius 10 cm with a constant speed of 10 cm/s. its

a) 100cm/s2

b) 10 cm/s2

c) 1 cm/s2

d) Zero

#16. ) If a particle moves in a circular path with an angular velocity which is uniformly changing in magnitude, then it has

a) No centripetal acceleration

b) A constant centripetal acceleration plus a

c) A tangential acceleration constant in

constant tangential acceleration and a centripetal acceleration which increases in magnitude.

#17. ) An object moving a circle will have an angular acceleration only if the net force on it

a) Is entirely centripetal

b) Has a tangential component

c) Is entirely centrifugal

d) Is entirely tangential

#18. A particle is moving in a circle of radius ‘r’ and centre O with constant speed. What is the change in velocity in moving from A and B?(If the angle between two velocity vector is )

a) 2 2 sin /2 v 

b) 2 sin /2 v 

c) 2 2 cos /2 v 

d) 2 cos /2 v 

#19. The speed of revolution of a particle around a circle is halved and its angular speed is doubled what happens to the radial acceleration?

a) Remains unchanged

b) Halved

c) Doubled

d) Quadrupled

#20. ) The average acceleration vector for a particle

a) A constant vector of magnitude v2/r

b) A vector of magnitude v2/r directed normal to

c) Equal to the instantaneous acceleration vector

d) A null vector

#21. A car is moving with speed 30 m/s on a circular path of radius 500 m. its speed is increasing at the rate of 2m/s2 . The acceleration of car is

a) 9.8 m/s2

b) 1.8 m/s2

c) 2 m/s2

d) 2.7 m/s2

#22. The angular speed of a particle, moving in a circle of radius 20 cm, increases from 2 rad/s to 40 rad/s in 9 s the ratio of its centripetal acceleration to tangential acceleration at the end of 19 s is,

a) 400: 1

b) 1: 800

c) 1:400

d) 800 : 1

#23. A sprit level is placed at the edge of a turn table along its radius. The bubble will be

a) At the centre of the container

b) At the outer edge of the container

c) At the inner edge of the container

d) Will oscillate about the centre of the container

#24. ) Select the wrong statement

Centrifugal force has same magnitude as that of centripetal force

b) Centrifugal force is along the radius, away

c) 2 F m r    

#25. A body of mass 0.4 kg is revolved in a horizontal circle of radius 5m. If it performs 120 rev/min, the centripetal force acting on it is.

a) 2 4 N 

b) 2 8 N 

c) 2 16 N 

d) 2 32 N 

#26. ) A body of mass 1 kg is tied to a string and revolved in a horizontal circle of radius 100 cm. If the breaking tension of the string is 100 N, the maximum velocity with which the body can be

a) 100 m/s

b) 10 m/s

c) 1 m/s

d) 0.1 m/s

#27. A stone of mass m is tied to the end of a string of length l. When whirled in a horizontal circle, the tension in the string is F. To whirl it in a radius of 1 2 lwith half the initial angular velocity, the new

b) 1 \ 2F

4\F

#28. A rope can withstand a tension of 2kgwt  . A body of mass 2 kg is tied to this rope and revolved in a horizontal circle of radius 5 m. the maximum frequency of revolution possible is

a) 0.2 rev/s

b) 0.5 rev/s

c) 1 rev/s

d) 2 rev/s

#29. centripetal force in vector form can be expressed

a) 5 m/s

b) 7 m/s

c) 9 m/s

#30. The centripetal force acting on a body of mass m revolving in a circle of radius r and completes n rev/sec, is

a) 2 4mrn 

b) 2 2 4mrn 

c) 2 2 2 4 mrn 

d) 2 2 4 mrn 

#31. If a small body of mass m is moving with angular velocity in a circle of radius r, then its K. E. will

m r  2

b) 2 2 m r 

c) 2 2 2 m r 

) 2 2 m r  ) A particle of mass

#32. A particle of mass m executing uniform circular motion on a path of radius r. if P is the magnitude of its linear momentum, the radial force acting on the particle will be

a) Pmr

b) 2 P

c) rP

d) 2

#33. A coin placed on a rotating table just slips when it is placed at a distance 4r from the centre, on doubling the angular velocity of the table, the coin will just slip now the coin is at a distance from centre is

a) 4r

b) r/4

c) r

d) 2 r

#34. A car is moving along a horizontal curve of radius 20 cm. If the coefficient of friction between the road and wheels of the car is 0.25, then its maximum safe speed is

a) 3 m/s

b) 12 m/s

d) 24 m/s

#35. The maximum safe speed of a vehicle on a circular track is 15 km/h. When the track becomes wet, the maximum safe speed is 10 km/h. the ratio of coefficient of friction of dry track to that of the wet

a) 2:3

b) 3:2

c) 9:4

d) 1:1

#36. ) Angle of banking is independent of

a) Velocity of vehicle

b) Radius of curvature

c) Mass of vehicle

d) Width of road

#37. A car is traveling on a circular banked road. The centripetal acceleration of a car is provided by

a) Normal reaction

b) Weight of a car

c) Horizontal component of normal reaction

d) Vertical component of normal reaction

#38. At what angle should a road be banked so that the vehicle may a bend of radius 10 m traveling with a speed of 10 m/s (g = 10 m/s2)

a) 80 degree

b) 45 degree

c) 60 degree

d) 90 degree

#39. ) A car can take a turn on a flat circular roadway relying on friction with a maximum speed v. The car now takes a turn on another flat circular roadway of twice the radius. If the coefficient of friction between the tyres and the road surface is the same as before, the maximum speed at which the car can now be driven is

a) 2v

b) root 2v

c) root 2 / v

d) 2 / v

Finish

वर दिलेल्या चाचणी मालिकेतील प्रश्न वेगवेगळ्या वेबसाईटवरून घेतले आहेत, याचे श्रेय त्यांनाच जाते, मी ते फक्त शैक्षणिक हेतूने शेअर करत आहे.

निष्कर्ष

या परीक्षांची पुरेशी तयारी करण्यासाठी विद्यार्थ्यांनी आवश्यक अभ्यासक्रम आणि मागील वर्षाच्या परीक्षेतील प्रश्नांचे पुनरावलोकन केले पाहिजे. कारण परीक्षेची वेळ मर्यादा अत्यंत कठोर असू शकते, वेळेचे व्यवस्थापन महत्त्वाचे आहे.

महाराष्ट्र बोर्डाच्या 12 व्या वर्गाच्या परीक्षांबद्दल अधिक माहिती मिळविण्यासाठी, तुम्हाला परीक्षेचे वेळापत्रक, अभ्यासक्रम आणि परीक्षेची माहिती मिळविण्यासाठी महाराष्ट्र शालेय परीक्षा मंडळाच्या अधिकृत वेबसाइटला भेट देणे आवश्यक आहे. तुम्ही तुमच्या शाळेशी किंवा आध्यात्मिक संस्थेशी संपर्क साधावा. ते तुम्हाला महाराष्ट्र बोर्ड 12वी इयत्तेबद्दल सर्वात विश्वासार्ह आणि अद्ययावत माहिती देऊ शकतात