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 daily with these NEET Physics objective questions on air pollution . NEET Physics Transistor Multiple Choice Questions

MCQs on Transistor :

1. The base of a transistor is …………. doped
(A) Moderately
(B) Lightly
(C) Heavily
(D) None of the above

2. How many depletion layers are there in a transistor
(A) Four
(B) One
(C) Two
(D) Three

3. A transistor has
(A) Two p-n junctions
(B) One p-n junction
(C) Three p-n junctions
(D) Four p-n junctions

4. The current carries in a PNP transistor is
(A) Free electrons
(B) Acceptor ions
(C) Donor ions
(D) Holes

5. The base-emitter junctions of a transistor is 
(A) a wide depletion layer
(B) Low resistance
(C) a reverse bias
(D) None

6. In a transistor the input impedance is
(A) Low
(B) Very high
(C) Almost zero
(D) High

7. The majority of the carriers from the emitter
(A) Recombine in the emitter
(B) Pass through the base of the collector
(C) Recombine in the base
(D) None of the above

8. The value of α of a transistor is
(A) More than 1
(B) Less than 1
(C) 1
(D) None of the above

9. The output impedance of a transistor is
(A) High
(B) Zero
(C) Low
(D) Very low

10. As the temperature of a transistor goes up, the base-emitter resistance
(A) Decreases
(B) Increases
(C) Remains the same
(D) None of the above

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 Elastic and Inelastic Collision Multiple Choice Questions

MCQs on Elastic and Inelastic Collision :

1. The principle of conservation of linear momentum can be strictly applied during a collision between two particles provided the time of impact is
(A) Moderately small
(B) Extremely large
(C) Extremely small
(D) Depends on a particular case

2. In an elastic collision of two particles the following is conserved
(A) Speed of each particle
(B) Kinetic energy of each particle
(C) Total kinetic energy of both the particles
(D) Momentum of each particle

3. A shell initially at rest explodes into two pieces of equal mass, then the two pieces will
(A) Move with different velocities in different directions
(B) Be at rest
(C) Move with the same velocity in the same direction
(D) Move with the same velocity in opposite directions

4. A lead ball strikes a wall and falls down, a tennis ball having the same mass and velocity strikes the wall and bounces back. Check the correct statement.
(A) The lead ball suffers a greater change in momentum compared with the tennis ball
(B) The tennis ball suffers a greater change in momentum as compared with the lead ball
(C) The momentum of the lead ball is greater than that of the tennis ball
(D) Both suffer an equal change in momentum

5. When two bodies collide elastically, then
(A) Kinetic energy of the system alone is conserved
(B) Only momentum is conserved
(C) Both energy and momentum are conserved
(D) Neither energy nor momentum is conserved

6. The coefficient of restitution for a perfectly elastic collision is
(A) 1
(B) 0
(C) ∞
(D) -1

7. Two balls at same temperature collide. What is conserved?
(A) Temperature
(B) Kinetic energy
(C) Momentum
(D) Velocity

8. A body of mass M collides against a wall with a velocity V and retraces its path with the same speed. The change in momentum is (take the initial direction of the velocity as positive)
(A) 2 Mv
(B) 1 Mv
(C) -2 Mv
(D) Zero

9. A shell of mass m moving with velocity v suddenly breaks into 2 pieces. The part having mass m/4 remains stationary. The velocity of the shell will be
(A) (4/3)v
(B) V
(C) 2 v
(D) ¾ v

10. A metal ball falls from a height of 32 metres on a steel plate. If the coefficient of restriction is 0.5 to what height will the ball rise after the second bounce
(A) 4 m
(B) 8 m
(C) 2 m
(D) 16 m

NEET  Physics is the very imporatant paper in the Medical Entrance EXAM. Here, you will discover the 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 Surface Tension Multiple Choice Questions make you feel confident in answering the question in the

MCQs on Surface Tension :

1. When there are no external forces, the shape of a liquid drop is determined by
(A) Surface Tension of the liquid
(B) The density of the liquid
(C) The viscosity of the liquid
(D) The temperature of air only

2. If T is the surface tension of the soap solution, the amount of work done in blowing a soap bubble from diameter D to a diameter 2D is
(A) 2πD²T
(B) 4πD²T
(C) 6πD²T
(D) 8πD²T

3. If the surface of a liquid is plane, then the angle of contact of the liquid with the walls of the container is
(A) Acute angle
(B) Obtuse angle
(C) 90⁰
(D) 0⁰

4. Raindrops are spherical in shape because of
(A) Capillary
(B) Surface Tension
(C) Downward motion
(D) Acceleration due to gravity

5. In a surface tension experiment with a capillary tube, the water rises up to 0.1m. If the same experiment is repeated on an artificial satellite which is revolving around the earth. The rise of water in a capillary tube is
(A) 0.1 m
(B) 9.8 m
(C) 0.98 m
(D) Full length of the capillary tube

6. At the critical temperature, the surface tension of the liquid
(A) Is zero
(B) Is infinity
(C) Is the same as that at the other temperature
(D) Cannot be determined

7. The surface of the water in contact with the glass wall is
(A) Plane
(B) Concave
(C) Convex
(D) Both a and b

8. When a soap bubble is charged
(A) It contracts
(B) It expands
(C) It does not undergo any change in size
(D) None of these

9. If common salt is dissolved in water, then the surface tension of saltwater is
(A) Increased
(B) Decreased
(C) Not changed
(D) First increases then decrease

10. A drop of oil is placed on the surface of the water. Which of the following statements is correct?
(A) It will remain on it as a sphere
(B) It will spread as a thin layer
(C) It will partly be as spherical droplets and partly as thin films
(D) It will float at the distorted drop on the water surface.

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 Motion of Connected Bodies Multiple Choice Questions

MCQs on Motion of Connected Bodies :

1. A block of mass M is pulled along a horizontal frictionless surface by a rope of mass m. If P is the force exerted on the free end of the rope, what is the force exerted on the block by the rope?

2. A rope of length L is pulled by a constant force F. The tension in the rope at a distance x from the end where the force is applied is

3. Three weights A, B and C of mass 2 kg each are hanging on string passing through a frictionless pulley. What is the tension in the string connecting weights B and C?
(A) 13 N
(B) 19.6 N
(C) 3.3 N
(D) 0

4. A frictionless pulley kept on a horizontal table connects two blocks of masses 4 kg and 5 kg. What is the acceleration of 5 kg mass?
(A) 5.44 m/s²
(B) 2.72 m/s²
(C) 19.5 m/s²
(D) 49 m/s²

5. Three blocks A, B and C each weighing 1, 8, and 27 kg respectively are connected to each other by an inextensible string and are moving on a smooth surface. If T₃ is equal to 36 N, then what will T₂ be equal to?
(A) 9 N
(B) 18 N
(C) 3.375 N
(D) 1.25 N

6. Three solid masses m₁, m₂ and m₃ placed on a frictionless table and are connected in succession. If the mass m₃ is dragged with a force T, the tension in the string between m₂ and m₃ are given as

7. A string passing over a frictionless pulley has a mass of 6 kg attached to one of its ends. To the other end a mass of 10 kg is attached. What is the tension in the thread?
(A) 2.45 N
(B) 24.5 N
(C) 73.5 N
(D) 79 N

8. What will the acceleration of the system of two masses connected to a pulley be if the masses weigh 5 kg and 10 kg?
(A) g
(B) g/2
(C) g/3
(D) g/4

9. A body of weight 2 kg is suspended as shown in the figure. What is the tension T₁ in the horizontal string?
(A) (frac{2}{sqrt{3}})
(B) (frac{sqrt{3}}{2})
(C) 2√3
(D) 2

10. A block of mass which weighs 4 kg is suspended through spring balances A and B. Then A and B will read respectively
(A) 0 kg and 4 kg
(B) 4 kg and 0 kg
(C) 4 kg and 4 kg
(D) 2 kg and 2 kg

MCQs on Gravitation :

1. If the change in the value of g at the height h above the surface of the earth is the same as at a depth x below it, then (both x and h being much smaller than the radius of the earth)

(a) x = h

(b) x = 2 h

(c) x = h2

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 Mass Defect Multiple Choice Questions

MCQs on Mass Defect :

1. Radioactive material A has a decay constant 8λ and material B has a decay constant λ. Initially, they have the same number of nuclei. After what time, the ratio of the number of nuclei of material B to that A will be 1/e?
(A) 1/λ
(B) 1/7λ
(C) 1/8λ
(D) 1/9λ

2. The half-life of a radioactive substance is 30 minutes. The time (in minutes) taken between 40% decay and 85% decay of the same radioactive substance is
(A) 15
(B) 30
(C) 45
(D) 60

3. If the radius of the ₁₃Al²⁷ nucleus is taken to be R^Al then the radius of ₅₃Te¹²⁵ nucleus is nearly
(A) (53/13)^1/3R_Al
(B) 5/3 R_Al
(C) ⅗ R_Al
(D) (13/53) ^⅓ R_Al

4. A nucleus of uranium decays at rest into nuclei of thorium and helium. Then,
(A) The helium nucleus has more kinetic energy than the thorium nucleus
(B) The helium nucleus has less momentum than the thorium nucleus
(C) The helium nucleus has more momentum than the thorium nucleus
(D) The helium nucleus has less kinetic energy than the thorium nucleus

5. The binding energy per nucleon of 3Li7 and 2He4 nuclei are 5.60 meV and 7.06meV respectively.
In the nuclear reaction 3Li7 + 1H1 ➡️ 2He4 +2He4+Q, the value of energy Q released is
(A) 19.6 MeV
(B) -2.4 MeV
(C) 8.4 MeV
(D) 17.3 MeV

6. Calculate the mass defect(amu/atom) for a ³⁷Cl atom for which the actual mass is 36.966 amu.
(A) 0.341 amu
(B) 0.388 amu
(C) 0.623 amu
(D) 0.264 amu

7. The mass defect for an isotope is 0.410 amu/atom. Calculate the value of binding energy.
(A) 1.23 x 10²⁰ kJ/mol
(B) 2.23 x 10³ kJ/mol
(C) 3.69 x 10¹⁰ kJ/mol
(D) 3.69 x 10¹³ kJ/mol

8. Which isotope below has the highest binding energy?
(A) ⁴He
(B) ¹⁶O
(C) ³²S
(D) ⁵⁵Mn

9. Which of the following sentences is incorrect?
(A) Nuclear binding energy is the energy released in the formation of an atom from subatomic particles
(B) It the nucleus was formed from initially separated protons and electrons then the amount of matter converted into energy was called Mass defect.
(C) The total mass of protons and electrons in the atom.
(D) The most stable nuclei are molecules with the highest binding energy.

10. A nucleus has a mass number A, atomic number Z and a binding energy B. The mass of neutron and proton are m_n and m_p respectively and cis the speed of light.

Which of the following expressions correctly represents the mass of the nucleus?
(A) (A – Z)m_n+Zm_p-B/c²
(B) (A – Z)m_n+Zm_p+ B/c²
(C) (A + Z)m_n+Zm_p– B/c²
(D) (A + Z)m_n+Zm_p+ B/c²