MCQ Questions for Class 11 Physics Chapter 7 System of Particles and Rotational Motion with Answers

Leave a Comment / By / January 25, 2022

Here you will find NCERT MCQ Questions for Class 11 Physics with Answers PDF Free Download based on the important concepts and topics given in the textbook as per CBSE new exam pattern. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Class 11 Physics. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

Q1. A transformer works on the principle of

(a) self induction
(b) electrical inertia
(c) mutual induction
(d) magnetic effect of the electrical current

(c) mutual induction

Q2. For an ideal-step-down transformer, the quantity which is constant for both the coils is

(a) current in the coils
(b) voltage across the coils
(c) resistance of coils
(d) power in the coils

(d) power in the coils

Q3. A thin uniform, circular ring is rolling down an inclined plane of inclination 300 without slipping. Its linear acceleration along the inclined plane will be

(a) g/2
(b) g/3
(c) g/4
(d) 2g/3

(a) g/2

Q4. Moment of inertia depends on

(a) Distribution of particles
(b) Mass
(c) Position of axis of rotation
(d) All of these

(d) All of these

Q5. Calculate the M.I. of a thin uniform ring about an axis tangent to the ring and in a plane of the ring, if its M.I. about an axis passing through the centre and perpendicular to plane is 4 kg m².

(a) 12 kg m²
(b) 3 kg m²
(c) 6 kg m²
(d) 9 kg m²

(c) 6 kg m²

Q6. If a body is rotating about an axis, passing through its centre of mass then its angular momentum is directed along its

(a) Radius
(b) Tangent
(c) Circumference
(d) Axis of rotation

(d) Axis of rotation

Q7. At resonant frequency the current amplitude in series LCR circuit is

(a) maximum
(b) minimum
(c) zero
(d) infinity

(a) maximum

Q8. Quality factor and power factor both have the dimensions of

(a) time
(b) frequency
(c) work
(d) angle

(d) angle

Q9. The centre of mass of a body

a) lies always on the surface of the body
b) lies always inside the body
c) may lie within, outside on the surface of the body
d) lies always outside the body

a) lies always on the surface of the body

Q10. The position of centre of mass of a system of particles does not depend upon the

a) relative distance between the particles
b) position of the particles
c) symmetry of the body
d) mass of particles

a) relative distance between the particles

Q11. The motion of the centre of mass depends on

a) total external forces
b) total internal forces
c) None of these
d) Both

a) total external forces

Q12. In a series LCR circuit the voltage across an inductor, capacitor and resistor are 20 V, 20 V and 40 V respectively. The phase difference between the applied voltage and the current in the circuit is

(a) 30°
(b) 45°
(c) 60°
(d) 0°

(d) 0°

Q13. In rotatory motion, linear velocities of all the particles of the body are

a) different
b) zero
c) cannot say
d) None of these

a) different

Q14. If the resultant of all external forces is zero, then velocity of centre of mass will be

a) zero
b) neither (a) nor (b)
c) constant
d) either (a) or (b)

a) zero

Q15. In rotation of a rigid body about a fixed axis, every …A…of the body moves in a …B…, which lies in a plane …C… to the axis and has its centre on the axis. Here, A, B and C refer to

a) particle, circle and perpendicular
b) particle perpendicular and perpendicular
c) circle, particle and perpendicular
d) particle, perpendicular and circle

a) particle, circle and perpendicular

Q16. Centre of mass of the earth and the moon system lies

a) closer to the earth
b) closer to the moon
c) at the mid-point of line joining the earth and the moon
d) cannot be predicted

a) closer to the earth

Q17. In an alternating current circuit consisting of elements in series, the current increases on increasing the frequency of supply. Which of the following elements are likely to constitute the circuit?

(a) Only resistor
(b) Resistor and inductor
(c) Resistor and capacitor
(d) Only inductor

(c) Resistor and capacitor

Q18. In which of the following circuits the maximum power dissipation is observed?

(a) Pure capacitive circuit
(b) Pure inductive circuit
(c) Pure resistive circuit
(d) None of these

(c) Pure resistive circuit

Q19. Concrete mixture is made by mixing cement, stone and sand in a rotating cylindrical drum. If the drum rotates too fast, the ingredients remain stuck to the wall of the drum and proper mixing of ingredients does not take place. The maximum rotational speed of the drum in revolutions per minute (rpm) to ensure proper mixing is close to : (Take the radius of the drum to be 1.25 m and its axle to be horizontal):

a) 27.0
b) 0.4
c) 1.3
d) 8.0

a) 27.0

Q20. Angular velocity of each particle of a rotating rigid body about axis of rotation is

a) same
b) different
c) depends on relative position
d) None of these

a) same

Class 11 Physics MCQs Questions with Answers Chapter Wise

Practicing NCERT Physics MCQs With Answers Pdf Class 11 is one of the best ways to prepare for the CBSE Class 11 board exam. There is no substitute for consistent practice whether one wants to understand a concept thoroughly or one wants to score better. If you have any queries regarding The CBSE Class 11 Physics MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

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