Gravitation Class 11 NEET Questions. We covered all the Gravitation Class 11 NEET Questions in this post for free so that you can practice well for the exam.
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MCQ on Gravitation for Class 11th Students
A wheel mounted on a shaft rotates at the rate of 480 rpm. If another identical wheel is stuck to the first wheel, then the frequency of the system will be
(A) 1200 rpm
(B) 480 rpm
(C) 300 rpm
(D) 240 rpm
Option d – 240 rpm
For a particle performing linear S.H.M, the acceleration and corresponding velocity of the particle area and v respectively. If we plot v² on the Y axis and an on the X axis, then the graph will be
(A) a straight line
(B) a parabola
(C) an ellipse
(D) an exponential curve
Option c – an ellipse
The masses of three aluminum wires are in the ratio 2 3 5 and their lengths are in the ratio 5:31. The ratio of their resistance is
(A) 125 : 32 : 30
(B) 125 : 30 : 2
(C) 115 : 125 : 65
(D) 65 : 115 : 125
Option b – 125 : 30 : 2
Drift velocity is the average velocity contributed from the
(A) thermal energy.
(B) influence of the electrical field.
(C) thermal energy and influence of the electrical field.
(D) thermal energy, the influence of the electrical field, and gravity.
Option b – influence of the electrical field.
For a system of two particles A and B, the location of the center of mass from B is three times farther than the location of the center of mass from A. If the center of mass is to be brought to the middle then,
(A) mass equivalent to 3mg should be added at B.
(B) mass equivalent to 2m, should be added at B.
(C) mass equivalent to 3mg should be added at A.
(D) mass equivalent to 2m, should be added at A.
Option b – mass equivalent to 2m, should be added at B.
The resultant resistance of the parallel combination of resistors is less than the individual because of
(A) effective increase in the number density of charge carriers.
(B) effective decrease in length.
(C) effective decrease in drift velocity.
(D) effective increase in the area of the cross-section.
Option d – effective increase in the area of the cross-section.
Choose the incorrect statement.
(A) The position of the center of mass of a body depends on its shape and the way the mass is distributed in the body.
(B) The center of mass may lie within the body or even outside it.
(C) The Centre of mass is a particle with position, velocity, and acceleration.
(D) It is easy to locate the center of mass of symmetrical bodies with uniform mass density.
Option c – The Centre of mass is a particle with position, velocity, and acceleration.
When a wire is bent in the middle and half of the wire that is bent is twisted with the other half, then, the new resistance is
(A) the same as the original.
(B) half the original resistance.
(C) one-fourth times the original resistance.
(D) twice the original resistance.
Option c – one-fourth times the original resistance.
A wire has resistance R. A parameter of the wire is changed by n times and resistance R is found to be changed by n² times, then the parameters varied is/are Assume mass is kept constant
(A) length increased by n times.
(B) radius increased by n times.
(C) area of the cross-section decreased by n times.
(D) both (A) and (C).
Option d – both (A) and (C).
Choose the incorrect statement.
(A) Ohm’s law is not obeyed by non-ohmic resistors.
(B) V = IR is not applicable for non-ohmic resistors.
(C) For non-ohmic resistors, R is not constant.
(D) all of the above.
Option b – V = IR is not applicable for non-ohmic resistors.
Assertion: The damping force on a system executing SHM is not constant. Reason: The damping force depends upon time.
(A) The assertion is True, Reason is True; Reason is a correct explanation for Assertion.
(B) The assertion is True, and Reason is True; Reason is not a correct explanation for Assertion.
(C) The assertion is True, Reason is False.
(D) The assertion is False, Reason is True.
Option c – The assertion is True, Reason is False.
Mobility is a ………. physical quantity.
(A) scalar
(B) vector
(C) constant
(D) scalar and vector
Option a – scalar
What is the time taken by a damped oscillator with a mass of block 500 g, spring constant 70 N/m, and damping constant 20 g/s for its amplitude of vibrations to drop to half of its initial value?
(A) 11 s
(B) 23.1 s
(C) 34.6 s
(D) 40.9 s
Option c – 34.6 s
If the total external force acting on a system of particles is zero, then
(A) every particle moves with a constant velocity.
(B) particles in pair move with a constant velocity.
(C) the center of mass moves with zero acceleration.
(D) the center of mass moves with zero velocity.
Option c – the center of mass moves with zero acceleration.
In practice, when the driving frequency is changed and made equal to the natural frequency of the oscillator, the amplitude is not infinite as predicted theoretically. This is because
(A) it is not possible to have a driving frequency equal to the natural frequency.
(B) infinity is a theoretical concept.
(C) in a given oscillatory system damping is never zero.
(D) forced oscillations can not produce resonance.
Option c – in a given oscillatory system damping is never zero.
For a rotating body, a straight line graph with a non-zero Y-intercept represents
(A) the moment of inertia vs. the radius of gyration.
(B) variation in mass vs. variation in radius of gyration.
(C) the logarithm of the moment of inertia vs. the logarithm of the radius of gyration
(D) moment of inertia vs. square of the radius of gyration.
Option c – the logarithm of the moment of inertia vs. the logarithm of the radius of gyration
A spring balance has a scale of length 20 cm reading from 0 to 20 kg. A body when suspended to spring, displaced, and released, oscillates with a period of 0.4 s. What is the weight of the body?
(A) 1.3 kg
(B) 2.1 kg
(C) 3.97 kg
(D) 5.6 kg
Option c – 3.97 kg
If for a flywheel, most of the mass is concentrated near the center then,
(A) it can never attain rotational equilibrium.
(B) it can not be rotated.
(C) it will be difficult to maintain uniform rotation.
(D) its moment of inertia will be infinite.
Option c – it will be difficult to maintain uniform rotation.
Which one of the following is NOT a characteristic of S.H.M.?
(A) Its acceleration is maximum in the extreme position.
(B) It is the projection of a uniform circular motion on a diameter.
(C) Its velocity is maximum at the mean position.
(D) Its velocity-time graph is a straight line.
Option d – Its velocity-time graph is a straight line.
If the temperature of a cell increases, its internal resistance
(A) remains unchanged.
(B) decreases.
(C) increases.
(D) increases if it is non-ohmic in nature.
Option b – decreases.
Angular impulse is ( Gravitation Class 11 NEET Questions )
(A) moment of inertia x angular velocity
(B) moment of inertia x change in angular velocity
(C) moment of inertia x rate of change of angular velocity
(D) torque × moment of inertia
Option b – moment of inertia x change in angular velocity
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