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 Junction Transistor Multiple Choice Questions

MCQs on Junction Transistor :

1. The emitter-base junction of a transistor is ………. Biased while the collector-base junction is ………….
(A) Reverse, Forward
(B) Reverse, Reverse
(C) Forward, forward
(D) Forward, reverse

Answer

Answer: (D) Forward, reverse

2. A NPN transistor conducts when
(A) Both collector and emitter are positive with respect to the base
(B) Collector is positive and the emitter is negative with respect to the base
(C) Collector is positive and the emitter is at the same potential as the base
(D) Both collector and emitter are negative with respect to the base

Answer

Answer: (B) Collector is positive and the emitter is negative with respect to the base

3. Which of the following is true
(A) Common base transistor is commonly used because the current gain is maximum
(B) Common emitter is commonly used because the current gain is maximum
(C) Common collector is commonly used because the current gain is maximum
(D) Common emitter is the least used transistor

Answer

Answer: (B) Common emitter is commonly used because the current gain is maximum

4. For a common base configuration of PNP transistor Ic/IE = 0.98 then the maximum current gain in common emitter configuration will be
(A) 12
(B) 24
(C) 6
(D) 5

Answer

Answer: (B) 24

5. In a PNP transistor working as a common-base amplifier, the current gain is 0.96 and emitter current is 7.2 mA. The base current is
(A) 0.4 mA
(B) 0.2 mA
(C) 0.29 mA
(D) 0.35 mA

Answer

Answer: (C) 0.29 mA

6. Which is the least doped region in a transistor?
(A) Either emitter or collector
(B) Base
(C) Emitter
(D) Collector

Answer

Answer: (B) Base

7. The transistors provide good power amplification when they are used in
(A) Common collector configuration
(B) Common emitter configuration
(C) Common base configuration
(D) None of these

Answer

Answer: (B) Common emitter configuration

8. For a transistor the parameter b= 99. The value of the parameter is a is
(A) 0.9
(B) 0.99
(C) 1
(D) 9

Answer

Answer: (B) 0.99

9. A transistor is used in common emitter mode as an amplifier. Then
(A) The base-emitter junction will be forward biased
(B) The input signal is connected in series with the voltage applied to the base-emitter junction
(C) The base-emitter junction will be reversed biased
(D) The voltage applied to bias the base-collector junction and the input signal is connected in series

Answer

Answer: (B) The input signal is connected in series with the voltage applied to the base-emitter junction

10. In a PNP transistor the base is the N-region. Its width relative to the P-region is
(A) Smaller
(B) Larger
(C) Same
(D) Not related

Answer

Answer: (A) Smaller

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 Horizontal Projectile Motion Multiple Choice Questions

MCQs on Horizontal Projectile Motion :

1. A stone is just released from the window of a train moving along a horizontal straight track. The stone will hit the ground following
(A) Hyperbolic path
(B) Straight path
(C) Circular path
(D) Parabolic path

Answer

Answer: (D) Parabolic path

2. A bullet is dropped from the same height when another bullet is fired horizontally. They will hit the ground
(A) Simultaneously
(B) Depends on the observer
(C) One after the other
(D) None of the above

Answer

Answer: (B) Simultaneously

3. A bomb is dropped from an aeroplane moving horizontally at a constant speed. When air resistance is taken into consideration, the bomb
(A) Flies with the aeroplane
(B) Falls to earth behind the aeroplane
(C) Falls to earth ahead of the plane
(D) Falls to earth exactly below the aeroplane

Answer

Answer: (B) Falls to earth behind the aeroplane

4. The maximum range of gum on horizontal terrain is 16 km. If g = 10 m/s2. What must be the muzzle velocity of the shell?
(A) 400 m/s
(B) 100 m/s
(C) 200 m/s
(D) 50 m/s

Answer

Answer: (A) 400 m/s

5. An aeroplane flying 490 m above ground level at 100 m/s, releases a block. How far on the ground will it strike?
(A) 2 km
(B) 0.1 km
(C) 1 km
(D) None

Answer

Answer: (C) 1 km

6. A man projects a coin upwards from the gate of a uniformly moving train. The path of coin for the man will be
(A) Vertical straight line
(B) Inclined straight line
(C) Parabolic
(D) Horizontal straight line

Answer

Answer: (A) Vertical straight line

7. A particle A is dropped from a height and another particle B is thrown in a horizontal direction with the speed of 5m/sec from the same height. The correct statement is
(A) Particle B will reach the ground first
(B) Both particles will reach the ground with the same speed
(C) Particle A will reach the ground first
(D) Both particles will reach the ground simultaneously

Answer

Answer: (D) Both particles will reach the ground simultaneously

8. A particle moves in a plane with constant acceleration in a direction from the initial velocity. The path of the particle will be
(A) A parabola
(B) An ellipse
(C) A straight line
(D) An arc of a circle

Answer

Answer: (A) A parabola

9. An aeroplane moving horizontally with a speed of 720 km/h drops a food pocket, while flying a horizontal direction with a speed of 5 m/sec from the same height. The correct statement is
(A) 9 sec and 1800 m
(B) 5 sec and 500 m
(C) 8 sec and 1500 m
(D) 3 sec and 2000 m

Answer

Answer: (A) 9 sec and 1800 m

10. At the height 80 cm, an aeroplane is moving with 150 m/s. A bomb is dropped from it so as to hit a target. At what distance from the target should the bomb be dropped
(A) 600 m
(B) 605.3 m
(C) 80 m
(D) 230 m

Answer

Answer: (B) 605.3 m

NEET  Physics is the very imporatant paper in the Medical Entrance EXAM. Here, you will discover the NEET Physics MCQs with 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 Radio Wave Propagation Multiple Choice Questions

MCQs on Radio Wave Propagation :

1. Mathematical prediction of radio waves was done by
(A) Einstein
(B) Hertz
(C) Faraday
(D) Maxwell

Answer

Answer: (D) Maxwell

2. The electric field and magnetic field of a radio wave are
(A) Perpendicular to each other
(B) Perpendicular to the direction of propagation
(C) Both a and b
(D) None of the above

Answer

Answer: (C) Both a and b

3. The speed of radio wave in free space is
(A) 3 x 10⁶ metres/second
(B) 3 x 10⁸ metres/second
(C) 3 x 10⁶ miles/second
(D) 3 x 10⁸ miles/second

Answer

Answer: (B) 3 x 10⁸ metres/second

4. Radio waves would strongly reflect off
(A) A flat insulating surface of the right size
(B) A flat metallic surface of the right size
(C) A flat dielectric surface of the right size
(D) A flat body of water

Answer

Answer: (B) A flat metallic surface of the right size

5. Radio waves sometimes bend around the corners due to
(A) Reflection
(B) Diffusion
(C) Refraction
(D) Diffraction

Answer

Answer: (D) Diffraction

6. Which of the following is the phenomenon caused when Radio waves travel in two or more paths during propagation and produce slowly-changing phase differences between signals?
(A) Absorption
(B) Fading
(C) Baffling
(D) skip

Answer

Answer: (B) fading

7. High-frequency long-distance propagation mostly depends on
(A) Ionospheric reflection
(B) Tropospheric reflection
(C) Ground reflection
(D) Inverted reflection

Answer

Answer: (A) Ionospheric reflection

8. What is the distance from the far end of the ground wave to the nearest point where the sky wave returns to earth called?
(A) Angle of radiation
(B) maximum usable frequency
(C) Skip distance
(D) Skip zone

Answer

Answer: (D) Skip zone

9. Which of the following are electromagnetic
(A) Radio waves
(B) Light
(C) Gamma waves
(D) All the above

Answer

Answer: (D) All the above

10. The radio waves were demonstrated experimentally by
(A) Hertz
(B) Maxwell
(C) Marconi
(D) Armstrong

Answer

Answer: (A) Hertz

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 Electric Charges And Fields Multiple Choice Questions make you feel confident in answering the question in the

MCQs on Electric Charges And Fields :

1. Pick the correct statement
(A) The glass rod gives protons to silk when they are rubbed against each other.
(B) The glass rod gives electrons to silk when they are rubbed against each other.
(C) The glass rod gains protons from silk when they are rubbed against each other.
(D) The glass rod gains electrons when they are rubbed against each other.

Answer

Answer: (B) The glass rod gives electrons to silk when they are rubbed against each other.

2. A force F acts between two charges +Q and -Q that is placed at a certain distance from each other. The third sphere of charge Q is placed between them. What is the magnitude and force experienced by the third charge?
(A) 3F in the direction of +Q charge
(B) 4F in the direction of +Q charge
(C) 8F in the direction of -Q charge
(D) No direction and magnitude is zero

Answer

Answer: (C) 8F towards -Q charge

3. At the four corners of the square A, B, C and D, Four charges of equal magnitude q are placed. Determine the magnitude of the force acting on the charge at point B?

Answer

Answer: (B) (frac{(1+2 sqrt{2}) q^{2}}{2 times 4 pi epsilon_{0} a^{2}})

4. At a distance r, two equal charges are kept and they exert a force F on each other. What is the force acting on each charge, if the distance between them is doubled and charges are halved?
(A) F/4
(B) 4 F
(C) F/16
(D) F/8

Answer

Answer: (C) F/16

5. Determine the total electric flux of a unit positive charge which is kept in the air?
(A) ϵ₀⁻¹
(B) ϵ₀
(C) 4πϵ₀
(D) 4πϵ₀⁻¹

Answer

Answer: (D) 4πϵ₀⁻¹

6. The variation of electric field E due to a hollow spherical conductor of radius R as a function of distance from the centre of the sphere is shown in which of the following graphs?

Answer

Answer: (B)

7. Pick the correct statement from the following
(A) If the point has a charge then the electric field is discontinuous at the point.
(B) Continous electric field at a point
(C) Continous electric field at a point if a charge is present at the point.
(D) At the point, the electric field is discontinuous if a negative charge is present at the point.

Answer

Answer: (A) If the point has a charge then the electric field is discontinuous at the point.

8. When is Gauss law true?
(A) the speed of light isn’t a universal constant
(B) the inverse square law is false
(C) magnetic monopoles are present
(D) None of the above

Answer

Answer: (B) the inverse square law is false

9. What is the SI unit of permittivity of free space?
(A) Weber
(B) Farad
(C) C²N^-1m^-2
(D) C²N^-1m²

Answer

Answer: (C) C²N^-1m^-2

10. Pick the true statements about electric field lines
(A) It provides information about the direction of the electric field
(B) Electric field lines provide information about the type of charge
(C) Electric field lines provide information about the field strength
(D) All of the above

Answer

Answer: (D) All of the above

11. The electric field lines due to a single negative charge are represented by

Answer

Answer:(B)

12. Which surface is considered for Gauss law?
(A) Spherical surface
(B) Closed Surface
(C) Gaussian Surface
(D) Plane Surface

Answer

Answer: (C) Gaussian 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 knowledge & problem-solving skills along with time management. NEET Physics Electromagnetic Induction and Alternating Currents Multiple Choice Questions

MCQs on Electromagnetic Induction and Alternating Currents :

1. How to increase the energy stored in an inductor by four times?
(A) By doubling the current
(B) This is not possible
(C) By doubling the inductance
(D) By making current √2times

Answer

Answer: (A) By doubling the current

2. Consider an inductor whose linear dimensions are tripled and the total number of turns per unit length is kept constant, what happens to the self-inductance?
(A) 9 times
(B) 3 times
(C) 27 times
(D) (frac{1}{3}) times

Answer

Answer: (B) 3 times

3. Lenz law is based on which of the following conservation
(A) Charge
(B) Mass
(C) Momentum
(D) Energy

Answer

Answer: (D) Energy

4. What will be the acceleration of the falling bar magnet which passes through the ring such that the ring is held horizontally and the bar magnet is dropped along the axis of the ring?
(A) It depends on the diameter of the ring and the length of the magnet
(B) It is equal due to gravity
(C) It is less than due to gravity
(D) It is more than due to gravity

Answer

Answer: (C) It is less than due to gravity

5. An observer is seeing the setup of an aluminium ring B facing an electromagnet A. The current I through A can be altered if

(A) B is independent of an increase or decrease of I
(B) If I increases, A will attract B
(C) If I increase, A will repel B
(D) If I decrease, A will repel B

Answer

Answer: (C) If I increase, A will repel B

6. What is the equivalent inductance of the following circuit if the pure inductance is 3.0H

(A) 9H
(B) 3H
(C) 1H
(D) 2H

Answer

Answer: (C) 1H

7. What is the need for laminating the core of a transformer?
(A) To reduce the resistance in the winding
(B) To reduce the eddy currents
(C) To reduce the hysteresis
(D) None of the above

Answer

Answer: (B) To reduce the eddy currents

8. Which of the following represent the variation of induced EMF with respect to time t if a short bar magnet is moved along its axis and has a constant velocity.

Answer

Answer: (B)

9. A wire loop is rotated in a magnetic field such that the frequency of change of direction of the induced emf is
(A) Six times per revolution
(B) Four times per revolution
(C) Twice per revolution
(D) Once per revolution

Answer

Answer: (C) Twice per revolution

10. Which of the following is the equivalent quantity of mass in electricity?
(A) Current
(B) Charge
(C) Potential
(D) Inductance

Answer

Answer: (D) Inductance

11. What is the unit of inductance?
(A) Volt/ampere
(B) Joule/ampere
(C) Volt-ampere/sec
(D) Volt-sec/ampere

Answer

Answer: (D) Volt-sec/ampere

12. What is the angle made by the plane of eddy currents with the plane of magnetic lines of force?
(A) 0°
(B) 40°
(C) 90°
(D) 180°

Answer

Answer: (C) 90°