Category: NEET Physics Objective Questions

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 Addition and Subtraction of Vectors Multiple Choice Questions

MCQs on Addition and Subtraction of Vectors :

1. At what angle should the two force vectors 5N and 12 N be added to get a resultant vector of 13 N?
(A) 0°
(B) 30°
(C) 90°
(D) 180°

Answer

Answer: (C) 90°

2. If the sum of two unit vectors is 1, then what is the difference between them?
(A) (frac { 1 }{ sqrt { 2 } } )
(B) √2
(C) √3
(D) √4

Answer

Answer: (C) √3

3. What is the net force on the particle if it is simultaneously acted upon by two forces 4 N and 3 N?
(A) 1 N
(B) 7 N
(C) 21 N
(D) Between 7 N and 1 N

Answer

Answer: (D) Between 7 N and 1 N

4. If the magnitude of the resultant force of two forces is lesser than the magnitude of the larger force, then
(A) The two forces are perpendicular to each other
(B) They two forces in opposite directions
(C) The forces are different in magnitude and direction
(D) The forces possess small magnitude

Answer

Answer: (B) The two forces are in opposite directions

5. Two forces (overrightarrow { { F }_{ 1 } } ) and (overrightarrow { { F }_{ 2 } } ) that are perpendicular to each other act on a point mass. The resultant force in the point mass is given by
(A) F₁=F₂
(B) F₁−F₂
(C) ({ F }_{ 1 }^{ 2 }+{ F }_{ 2 }^{ 2 })
(D) (sqrt { { F }_{ 1 }^{ 2 }+{ F }_{ 2 }^{ 2 } } )

Answer

Answer: (sqrt { { F }_{ 1 }^{ 2 }+{ F }_{ 2 }^{ 2 } } )

6. If (left| overrightarrow { A } -overrightarrow { B } right| =left| overrightarrow { A } right| =left| overrightarrow { B } right| ), then what is the angle between (overrightarrow { A } ) and (overrightarrow { b } ) ??
(A) 0°
(B) 30°
(C) 60°
(D) 90°

Answer

Answer: (C) 60°

7. Which of the following is true for the given diagram?

Answer

Answer: (B) (overrightarrow { C } +overrightarrow { A } =overrightarrow { B } )

8. If three vectors A, B and C have magnitudes 5, 12 and 13 and (overrightarrow { A } +overrightarrow { B } =overrightarrow { C } ), then what is the angle between B and C?

Answer

Answer: (A) (cos ^{ -1 }{ frac { 12 }{ 13 } } )

9. Two forces F₁ and F₂ act on a body. One of the forces is double of the other force. The resultant of these forces is equal to the larger force. What is the angle between the forces?

Answer

Answer: (D) (cos ^{ -1 }{ -frac { 1 }{ 4 } } )

10. A person travels 10 km North and 20 km East. What will be the displacement from the initial point?
(A) 20 km
(B) 22.36 km
(C) 30 km
(D) 32.36 km

Answer

Answer: (B) 22.36 km

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 knowledge & problem-solving skills along with time management. NEET Physics Conservation of Linear Momentum and Impulse Multiple Choice Questions exam & increases your scores to high.

MCQs on Conservation of Linear Momentum and Impulse :

1. How is a jet plane able to fly in the air?
(A) The thrust of the jet plane compensates the force of gravity
(B) The weight of the air is the weight of the plane
(C) The force of gravity doesn’t act on bodies moving with high speed
(D) The flow of the air around the wings cause an upward force which compensates for the force of gravity

Answer

Answer: (A) The thrust of the jet plane compensates the force of gravity

2. A player catches a ball of mass 150 gm moving at a rate of 20 m/s. If the process of catching is to be completed in 0.1 sec. What is the force exerted by the ball on the hands of the player?
(A) 3000 N
(B) 300 N
(C) 30 N
(D) 0.3 N

Answer

Answer: (C) 30 N

3. When a force acts on a ball of mass 150 g for 0.1 sec, it produces an acceleration of 20 m/s². What is the value of this impulsive force?
(A) 0.5 N-s
(B) 0.1 N-s
(C) 0.3 N-s
(D) 1.2 N-s

Answer

Answer: (C) 0.3 N-s

4. What is the motion of the rocket based on?
(A) Mass
(B) Linear Momentum
(C) Kinetic Energy
(D) Angular Momentum

Answer

Answer: (B) Linear Momentum

5. Which of the following is momentum closely related to?
(A) Impulse
(B) Power
(C) Force
(D) Kinetic Energy

Answer

Answer: (A) Impulse

6. Rocket Engines lift rocket from the earth surface because the hot gas with high velocity
(A) Push against the air
(B) Push against the earth
(C) Heat up the air which lifts the rocket
(D) React against the rocket and push it up

Answer

Answer: (D) React against the rocket and push it up

7. A bullet of mass 5 gm is fired from a gun of mass 5 kg. What is the velocity of the muzzle if the recoil velocity is 500 m/s.
(A) 500 m/s
(B) 5 m/s
(C) 50 m/s
(D) 0.5 m/s

Answer

Answer: (D) 0.5 m/s

8. A rope of length 5 m is kept on a frictionless surface and a force of 5 N is applied to one of its ends. What is the tension in the rope at 1 m from this end?
(A) 1 N
(B) 4 N
(C) 3 N
(D) 5 N

Answer

Answer: (B) 4 N

9. A wagon weighing 1000 kg moves 50 km/h on smooth rails. Later, a mass of 250 kg is placed in the wagon. What is the velocity with which it moves?
(A) 20 km/hr
(B) 50 km/hr
(C) 40 km/hr
(D) 2.5 km/hr

Answer

Answer: (C) 40 km/hr

10. An iron ball having a mass of 100 g with a velocity of 10 m/s collides with the wall at an angle of 300 and rebounds with the same angle. If the period of contact between the wall and the ball is 0.1 second. What is the force experienced by the ball?
(A) 0.1 N
(B) 1 N
(C) 10 N
(D) 100 N

Answer

Answer: (C) 10 N

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 Impedance Multiple Choice Questions

MCQs on Impedance :

1. What is the value of input impedance of a quarter-wave line 50 ohm and the load impedance of 20 ohms?
(A) 50
(B) 20
(C) 1000
(D) 125

Answer

Answer: (D) 125

2. The value of input impedance for a matched line will be equal to
(A) Load impedance
(B) Characteristic impedance
(C) Output impedance
(D) Zero

Answer

Answer: (B) Characteristic impedance

3. What is the ratio of  characteristic impedance to the input impedance if the ratio of load voltage to the input voltage is given as 5
(A) ⅕
(B) 5
(C) 10
(D) 25

Answer

Answer: (B) 5

4. The maximum impedance of a transmission line 50 ohm and the standing wave ratio of 2.5 is
(A) 20
(B) 125
(C) 200
(D) 75

Answer

Answer: (C) 125

5. What is the normally chosen value of the characteristic impedance of a transmission line?
(A) 50
(B) 75
(C) 50 or 75
(D) 100

Answer

Answer: (C) 50 or 75

6. What is the value of negative sequence impedance?
(A) 1
(B) Z
(C) Same as positive sequence
(D) infinity

Answer

Answer: (C) Same as positive sequence

7. The standing wave ratio is 4 for a transmission line of 75 ohms. What is the value of the minimum impedance?
(A) 75
(B) 300
(C) 18.75
(D) 150

Answer

Answer: (C) 18.75

8. A transmission line has a voltage of 24 V and a conduction current of 1.2 A. What will its receiving impedance?
(A) 25.2
(B) 22.8
(C) 28.8
(D) 20

Answer

Answer: (D) 20

9. What is the value of the characteristic impedance of a transmission line with impedance and admittance of 16 and 9?
(A) 25
(B) 1.33
(C) 0.75
(D) 7

Answer

Answer: (B) 1.33

10. The propagation constant of a transmission line with impedance and admittance of 9 and 16, respectively is
(A) 25
(B) 144
(C) 12
(D) 7

Answer

Answer: (C) 12

MCQs on Zener Diode :

1. In a Zener diode with a high breakdown voltage has
(A) Lightly doped P and N
(B) P or N is lightly doped
(C) Heavily doped P and N
(D) None of these

Answer

Answer: (A) Lightly doped P and N

2. In Zener diode, the Zener breakdown takes place
(A) Below 6 V
(B) At 6 V
(C) Above 6 V
(D) None of the above

Answer

Answer: (A) Below 6 V

3. Which of the following controls the current in a Zener diode?
(A) Zener diode resistance
(B) Potential barrier
(C) Reverse bias voltage
(D) External circuits

Answer

Answer: (D) External circuits

4. A Zener diode when biased correctly
(A) a. Never overheats
(B) b. Has a constant voltage across it
(C) c. Acts as a fixed resistance
(D) d. Has a constant current passing through it

Answer

Answer: (C) Has a constant voltage across it

5. In Zener diode, the breakdown is due to Zener, has a doping
(A) Lowest
(B) Moderate
(C) High
(D) Low

Answer

Answer: (C) High

6. In a Zener diode
(A) Negative resistance characteristic exists
(B) Forward voltage rating is high
(C) Sharp breakdown occurs at a low reverse voltage
(D) All of the above

Answer

Answer: (C) Sharp breakdown occurs at a low reverse voltage

7. A Zener diode, having breakdown voltage equal to 15 V, is used in a voltage regulator circuit shown in the figure. The current through the diode is
(A) 10 mA
(B) 15 mA
(C) 20 mA
(D) 5 mA

Answer

Answer: (D) 5 mA

8. How is the breakdown region set during the manufacturing of the diode?
(A) By controlling the size of the diode
(B) By controlling the doping of the diode
(C) By managing the biasing of diode
(D) All the above

Answer

Answer: (A) By controlling the doping of the diode

9. Depletion region behaves as
(A) Semiconductor
(B) Insulator
(C) Conductor
(D) High resistance

Answer

Answer: (B) Insulator

10. Depletion region contains
(A) Free holes
(B) Free electrons
(C) Immobile charge carriers
(D) All of the above

Answer

Answer: (C) Immobile charge carriers

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 Photoelectric Effect Multiple Choice Questions make you feel confident in answering the question in the

MCQs on Photoelectric Effect :

1. Photoelectric effect was explained by
(A) Einstein
(B) Faraday
(C) Plank
(D) Hertz

Answer

Answer: (A) Einstein

2. In a photoelectric experiment for 4000 Å incident radiation, the potential difference to stop the ejection is 2 V. If the incident light is changed to 3000 Å, then the potential required to stop the ejection of electrons will be
(A) 2 V
(B) Less than 2 V
(C) Zero
(D) Greater than 2 V

Answer

Answer: (D) Greater than 2 V

3. Light of wavelength 4000 Å is incident on a sodium surface for which the threshold wavelength of photo-electrons is 5420 Å. The work function of sodium is
(A) 5 eV
(B) 3 eV
(C) 2.29 eV
(D) 0.57 eV

Answer

Answer: (C) 2.29 eV

4. Photocell is a device to
(A) Store photons
(B) Measure light intensity
(C) Convert photon energy into mechanical energy
(D) Store electrical energy for replacing storage batteries

Answer

Answer: (B) Measure light intensity

5. Photoelectrons stopping potential depends on
(A) Frequency of incident light and nature of the cathode material
(B) The intensity of the incident light
(C) The frequency of the incident light
(D) Nature of cathode material

Answer

Answer: (A) Frequency of incident light and nature of the cathode material

6. What is the value of the maximum kinetic energy acquired by electron due to radiation of wavelength 100 nm?
(A) 12 eV
(B) 6.2 eV
(C) 100 eV
(D) 300 eV

Answer

Answer: (B) 6.2 eV

7. The stopping potential value is 0.6 V when the light source is kept at a distance of 20 cm. When the source is kept at 40 cm away, the stopping potential will be
(A) 0.6 V
(B) 0.3 V
(C) 1.2 V
(D) 2.4 V

Answer

Answer: (A) 0.6 V

8. If the work function for a certain metal is 3.2 x 10^-19 joule and it is illuminated with light of frequency 8 x 10¹⁴ Hz. The maximum kinetic energy of the photo-electrons would be (h= 6.63 x 10^-34 Js).
(A) 2.1 x 10^-19 J
(B) 8.5 x 10^-19 J
(C) 5.3 x 10^-19 J
(D) 3.2 x 10^-19 J

Answer

Answer: (A) 2.1 x 10^-19 J

9. A photocell is receiving light from a source placed at a distance of 1m. If the same source is to be placed at a distance of 2 m, then the ejected electron
(A) Moves in one-fourth energy as that of the initial energy
(B) Moves with one-fourth momentum as that of the initial momentum
(C) Will be half in number
(D) Will be one-fourth in number

Answer

Answer: (D) Will be one-fourth in number

10. The minimum energy required to remove an electron is called
(A) Stopping potential
(B) Kinetic energy
(C) Work function
(D) None of these

Answer

Answer: (C) Work function

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