Category: NEET Physics Objective Questions

NEET  Physics is the very imporatant paper in the Medical Entrance EXAM. So these NEET Physics MCQs and Answers for all Concepts as per the new syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution . NEET Physics Third law of motion Multiple Choice Questions

MCQs on Third law of motion :

1. Walking is possible on the account of
(A) Newton’s First Law of Motion
(B) Newton’s Second Law of Motion
(C) Newton’s Third Law of Motion
(D) Newton’s Law of Gravitation

Answer

Answer: (C)Newton’s Third Law of Motion

2. When we jump out of the boat standing in still water, the boat moves
(A) Forward
(B) Backwards
(C) Sideways
(D) It doesn’t move

Answer

Answer: (B) Backwards

3. A man is at rest on perfectly smooth ice in the middle of a pond. Using the principle of which law will get him to the shore?
(A) Newton’s First Law
(B) Newton’s Second Law
(C) Newton’s Third Law
(D) All the above three laws

Answer

Answer: (C) Newton’s Third Law

4. Recoiling of a cannon after firing a shot is an example of
(A) Newton’s First Law
(B) Newton’s Second Law
(C) Newton’s Third Law
(D) Newton’s Law of Gravitation

Answer

Answer: (C) Newton’s Third Law

5. A body floats in a beaker that contains liquid. If the whole system as shown in the figure falls freely under gravity, then the upthrust on the body due to the liquid is
(A) Equal to the weight of the displaced liquid
(B) Equal to the weight of the body in the air
(C) Zero
(D) None of the above

Answer

Answer: (C) Zero

6. The gun recoils after firing a bullet due to
(A) Newton’sThird Law of Motion
(B) The backward thrust of gases
(C) Newton’s First Law of Motion
(D) Conservation of Energy

Answer

Answer: (A) Newton’s Third Law of Motion

7. A lift carrying a passenger is going up and the total mass of passenger and the lift is 1500 kg. The variation in the speed of the lift is shown in the graph given below. What is the tension in the rope pulling the lift at t = 11 sec?

(A) 14700 N
(B) 17400 N
(C) 12500 N
(D) 12000 N

Answer

Answer: (D) 12000 N

8. In the above question, how high does the lift take the passenger?
(A) 36 meters
(B) 3.6 meters
(C) 44 meters
(D) 4.4 meters

Answer

Answer: (A) 36 meters

9. Why won’t the man attempting to pull himself by tugging on his hair not succeed?
(A) The frictional force in play while gripping is small.
(B) The exerted force is small.
(C) The force applied is internal to the system.
(D) Newton’s law of inertia is not applicable to living beings.

Answer

Answer: (C) The force applied is internal to the system.

10. The horse pulling the wagon is able to move forward because of
(A) the force exerted by the horse on the ground
(B) the force exerted by the ground on the horse
(C) the force exerted by the wagon on the horse
(D) the force exerted by the horse on the wagon

Answer

Answer: (B) the force exerted by the ground on the horse

MCQs on Optics :

1. Calculate the velocity of the light ray in the medium, if the critical angle for TIR from medium to the vacuum is 30°.
(A) 2 x 10⁸ m/s
(B) 1.5 x 10⁸ m/s
(C) 0.75 x 10⁸ m/s
(D) 3 x 10⁸ m/s

2. Which of the following is the combination that is used in the formation of achromatic lenses?

(A) 1 convex and 1 plane mirror
(B) 2 convex lenses
(C) 1 convex and 1 concave lens
(D) 2 concave lenses

3. How does magnifying power change for an objective lens if the focal length of the objective lens is increased?

(A) The microscope will decrease but for the telescope, it will increase
(B) The microscope will increase but for the telescope, it decreases
(C) The microscope and telescope will increase
(D) The microscope and telescope will decrease

4. Concave lenses can suffer from:

(A) Chromatic aberration but not spherical aberration.
(B) Spherical aberration but not chromatic aberration.
(C) Neither spherical nor chromatic aberration.
(D) Both spherical and chromatic aberration.

5. The radius of curvature of a convex mirror of focal length -8 centimeters is:

(A) -4 centimeters.
(B) 16 centimeters.
(C) 4 centimeters.
(D) -16 centimeters.

6. What is the magnification produced by the plane mirror?

(A) Zero
(B) +1
(C) -1
(D) Between 0 and +∞

7. The wavelength of a photon with an energy of 3.6 eV is:

(A) 869 nanomters.
(B) 345 nanometers
(C) 543 nanometers
(D) 552 nanometers.

8. The direction of propagation of an electromagnetic wave is the same as:

(A) E
(B) E.B
(C) E×B
(D) B×E

9. What happens to the refractive index on heating the liquid?
(A) Increases
(B) Decreases
(C) Remains unchanged
(D) Increases or decreases depending on the rate of heating

10. Calculate the speed of light in water if the refractive index of water is 1.33
(A) 4 x 10⁸ m/s
(B) 2.25 x 10⁸ m/s
(C) 1.33 x 10⁸ m/s
(D) 3 x 10⁸ m/s

11. What is hypermetropia?
(A) Bad vision due to age
(B) Short-sightedness
(C) Long-sightedness
(D) Formation of a layer on the eye

12. Rainbow is an example of which phenomenon?
(A) Refraction and scattering
(B) Refraction and total internal reflection
(C) Dispersion and reflection
(D) Dispersion and total internal reflection

NEET  Physics is the very imporatant paper in the Medical Entrance EXAM. So these NEET Physics MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Physics objective questions on air pollution . NEET Physics Inductance Multiple Choice Questions make you feel confident in answering the question in the

MCQs on Inductance :

1. Mutual inductance between two magnetically coupled coils depends on
(A) Permeability of the core material
(B) Number of turns of the coils
(C) The cross-sectional area of their common core
(D) All of the above

Answer

Answer: (D) All of the above

2. What will be the inductance if the iron core is removed from the iron cored coil to make it air-cored coil?
(A) More
(B) Less
(C) The same
(D) None

Answer

Answer: (B) Less

3. Higher the self-inductance of a coil
(A) Lesser its weber-turns
(B) Emf induced is low
(C) Greater the flux produced
(D) Longer the delay in establishing a steady current through it

Answer

Answer: (D) Longer the delay in establishing a steady current through it

4. Which of the following circuit elements will oppose the change in circuit current?
(A) Capacitance
(B) Inductance
(C) Resistance
(D) All of the above

Answer

Answer: (B) Inductance

5. How does an inductor work?
(A) Storing energy as a magnetic field.
(B) A wire piece is charged
(C) Introducing resistance into a circuit
(D) Choking off high-frequency ac

Answer

Answer: (A) Storing energy as a magnetic field

6. The inductance of the coil is not affected by which of the following?
(A) The length of the coil
(B) Number of turns
(C) The material of the core
(D) The diameter of the wire

Answer

Answer: (D) The diameter of the wire

7. In a small inductance:
(A) Large current flow
(B) Energy is stored and released quickly
(C) Small current flow
(D) Energy is stored and released slowly

Answer

Answer: (B) Energy is stored and released quickly

8. The phenomenon due to which there is an induced current in one coil due to the current in a neighbouring coil is?
(A) Mutual inductance
(B) Steady current
(C) Electromagnetism
(D) Susceptance

Answer

Answer: (A) Mutual inductance

9. The combination of the same two inductors (33 mH and 55 mH) connected in parallel without mutual inductance will have a value of
(A) 22 mH
(B) 88 mH
(C) 1.8 H
(D) 21 mH

Answer

Answer: (B) 88 mH

10. Three inductance with the values 4 NH, 140 μH, and 5 H are connected in series without mutual inductance. For practical purposes, the net inductance will be very close to
(A) 4 NH
(B) 140 μH
(C) 5 H
(D) None of these

Answer

Answer: (C) 5 H

NEET  Physics is the very imporatant paper in the Medical Entrance EXAM. So these NEET Physics MCQs and Answers for all Concepts as per the new syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution . NEET Physics Optical Instrument Multiple Choice Questions

MCQs on Optical Instrument :

1. A lens which converges a beam of parallel rays to a point is called
(A) Diverging (or concave) lens
(B) Converging (or convex) lens
(C) Plano concave lens
(D) Plano-convex lens

Answer

Answer: (B) Converging (or convex) lens

2. The diameter of a lens is called
(A) Focal length
(B) Principle axis
(C) Aperture
(D) Radius of curvature

Answer

Answer: (C) Aperture

3. In going from a denser to rarer medium a ray of light is
(A) Undeviated
(B) Bent away from the normal
(C) Bent towards the normal
(D) polarised

Answer

Answer: (B) Bent away from the normal

4. The power of a concave lens is
(A) Real
(B) Virtual
(C) Positive
(D) negative

Answer

Answer: (D) negative

5. Magnifying power of a simple microscope
(A) Increases with increase in focal length
(B) Increases with the decrease in focal length
(C) No effect with decrease or increase with the focal length
(D) Least distance of distinct vision

Answer

Answer: (B) Increases with the decrease in focal length

6. Magnification of astronomical telescope is
(A) f₀ + f_e
(B) f₀/f_e
(C) f_e/f₀
(D) (1+f₀/f_e)L/f₀

Answer

Answer: (B) f₀/f_e

7. The magnifying power of an astronomical telescope is 10 and the focal length of its eye-piece is 20 cm. The focal length of its objective will be
(A) 200 cm
(B) 2 cm
(C) 0.5 cm
(D) 0.5 x 10^–2 cm

Answer

Answer: (A) 200 cm

8. The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance between the objective and the eye-piece is found to be 20 cm. The focal lengths of the lenses are
(A) 18 cm, 2 cm
(B) 11 cm, 9 cm
(C) 10 cm, 10 cm
(D) 15 cm, 5 cm

Answer

Answer: (A) 18 cm, 2 cm

9. In a compound microscope, magnifying power is 95 and the distance of the object from the objective lens is 1/38 cm. The focal length of the objective lens ¼ cm. What is the magnification of eyepiece?
(A) 5
(B) 10
(C) 100
(D) 200

Answer

Answer: (A) 5

10. A hypermetropic person having “near point” at a distance of 0.75 m puts on spectacles of power 2.5 D. The “near point” now is at
(A) 0.75 m
(B) 0.83 m
(C) 0.26 cm
(D) 0.26 m

Answer

Answer: (D) 0.26 m

NEET  Physics is the very imporatant paper in the Medical Entrance EXAM. So these NEET Physics MCQs and Answers for all Concepts as per the new syllabus. Practice daily with these NEET Physics objective questions on air pollution . NEET Physics Moving Coil Galvanometer Multiple Choice Questions

MCQs on Moving Coil Galvanometer :

1. The deflection θ is related to the electric current I in a galvanometer by the relation
(A) I ∝ θ
(B) I ∝ tan θ
(C) I ∝ sin θ
(D) I ∝ cos θ

Answer

Answer: (A) I ∝ θ

2. A moving coil galvanometer carries a current I and the magnetic field B is radial. The coil has N number of turns and an effective area A. The torque acting on the coil of a moving coil galvanometer is given by
(A) NA²B²I
(B) NABI²
(C) NABI
(D) N²ABI

Answer

Answer: (C) NABI

3. The sensitivity of a moving coil galvanometer can be increased by decreasing
(A) The number of turns in the coil
(B) The area of the coil
(C) The magnetic field
(D) The couple per unit twist of the suspension

Answer

Answer: (D) The couple per unit twist of the suspension

4. In ballistic galvanometer, the frame on which the coil is wound is non-metallic. It is
(A) To avoid the production of induced e.m.f
(B) To avoid the production of eddy currents
(C) To increase the production of eddy currents
(D) To increase the production of induced e.m.f

Answer

Answer: (B) To avoid the production of eddy currents

5. The reason the coil is bound over the metallic frame in moving coil galvanometer is
(A) The metallic frame helps in oscillation
(B) The metallic frame helps in making steady deflection without any oscillation
(C) The metallic frame increases the magnetic field
(D) None of the above

Answer

Answer: (B) The metallic frame helps in making steady deflection without any oscillation

6. The deflection in moving coil galvanometer is
(A) Inversely proportional to the area of the coil
(B) Directly proportional to the torsional constant
(C) inversely proportional to the current flowing
(D) Directly proportional to the number of turns of the coil

Answer

Answer: (D) Directly proportional to the number of turns of the coil

7. The pole pieces of the magnet used in a pivoted coil galvanometer are
(A) Plane surfaces of a horse-shoe magnet
(B) Cylindrical surfaces of a bar magnet
(C) Plane surfaces of a bar magnet
(D) Cylindrical surfaces of a horse-shoe magnet

Answer

Answer: (D) Cylindrical surfaces of a horse-shoe magnet

8. A current-carrying rectangular coil placed in a uniform magnetic field. In which orientation will the coil rotate?
(A) In any orientation
(B) The magnetic field is parallel to the plane of the coil
(C) The magnetic field is at 45⁰ with the plane of the coil
(D) The magnetic field is perpendicular to the plane

Answer

Answer: (D) The magnetic field is perpendicular to the plane

9. What is the shape of a magnet in moving coil galvanometer to make the radial magnetic field?
(A) Convex cylindrical magnet
(B) Horse-shoe magnet
(C) Concave cylindrical magnet
(D) None

Answer

Answer: (C) Concave cylindrical magnet

10. Phospher- bronze wire is used in suspension because it has
(A) A large couple per unit twist
(B) A small couple per unit twist
(C) Low conductivity
(D) High Sensitivity

Answer

Answer: (B) A small couple per unit twist

NEET  Physics is the very imporatant paper in the Medical Entrance EXAM. So these NEET Physics MCQs and Answers for all Concepts as per the new syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution . NEET Physics First Law of Motion Multiple Choice Questions

MCQs on First Law of Motion :

1. Why does a rider on horseback fall when the horse starts running all of a sudden?
(A) The rider is suddenly afraid of falling
(B) The lower body of the rider moves forward with the horse but the inertia of rest keep the upper body at rest
(C) The rider is pushed backwards
(D) None of the above options

Answer

Answer: (B) The lower body of the rider moves forward with the horse but the inertia of rest keep the upper body at rest

2. Why do passengers in a moving train suddenly feel a jerk in the forward direction when the train stops abruptly?
(A) The upper body of passengers continues to be in the state of motion while the lower part of the body which in contact with the seat remains at rest
(B) The back of the seat pushes passengers forward
(C) The inertia of rest stops the train and takes the passengers forward
(D) Nothing can be said due to insufficient data

Answer

Answer: (A) The upper body of passengers continues to be in the state of motion while the lower part of the body which in contact with the seat remains at rest

3. Which of the following statements is true about inertia?
(A) Inertia is the property of a body by virtue of which the body is unable to change by itself the state of rest.
(B) Inertia is the property of a body by virtue of which the body is able to change by itself the state of rest
(C) Inertia is the property of a body by virtue of which the body is unable to change by itself the direction of motion
(D) Inertia is the property of a body by virtue of which the body is unable to change by itself the state of rest and uniform linear motion

Answer

Answer: (D) Inertia is the property of a body by virtue of which the body is unable to change by itself the state of rest and uniform linear motion

4. Why does a man getting off a moving bus fall down?
(A) He falls because of his habit of leaning forward
(B) Due to inertia of motion, the upper body continues to be in motion in the forward direction but the feet comes to rest as soon as they touch the ground
(C) Due to inertia of rest, the road is left behind and the man reaches forward
(D) Due to all of the reasons stated above

Answer

Answer: (B) Due to inertia of motion, the upper body continues to be in motion in the forward direction but the feet comes to rest as soon as they touch the ground

5. A boy in the topmost birth in a compartment of a train drops an apple aiming at the open hands of his birth while the train is just going to stop at the railway station. Where will the apple fall if the brother is sitting vertically below his hands at a distance of 2 meters?
(A) The apple falls precisely on the hands of his brother
(B) Slightly away from the hands of his brother in the direction opposite to the direction of the motion of the train
(C) Slightly away from the hands of his brother in the direction of the motion of the train
(D) None of the above

Answer: 

Answer

Answer: (C) Slightly away from the hands of his brother in the direction of the motion of the train

6. Which of the following does Newton’s first law of motion describe?
(A) Inertia
(B) Work
(C) Energy
(D) Moment of Inertia

Answer

Answer: (A) Inertia

7. A bird weighing 2 kg is locked inside a cage of mass 1 kg. If the bird starts flying what will be the weight of the bird and cage assembly?
(A) 4 kg
(B) 3 kg
(C) 2.5 kg
(D) 1.5 kg

Answer

Answer: (B) 3 kg

8. A mass of 1 kg is suspended by a string A and another string C is connected to its lower end as shown in the figure. What will happen if a sudden jerk is given to C?

(A) The mass starts to rotate
(B) The portion AB of the string will break
(C) The portion BC of the string will break
(D) The string remains intact

Answer

Answer: (C) The portion BC of the string will break

9. In the above question what will happen if the string C is stretched slowly?
(A) The portion BC of the string breaks
(B) The portion AB of the string breaks
(C) None of the strings breaks
(D) None of the above options

Answer

Answer: (B) The portion AB of the string breaks

10. What will happen if a force is applied to a body moving with a constant speed along a straight line?
(A) The speed increases
(B) The direction changes
(C) The momentum decreases
(D) Continues to move with uniform velocity

Answer

Answer: (D) Continues to move with uniform velocity