NEET Test Series-2021 to 2022/NEET Physics MCQ set 4 Sample Test,Sample questions

Question: Conductors are materials that allow

1.Allow the flow of heat

2.Does not allow heat to flow

3. Allows cold to flow

4.Stops cold from passing through

Posted Date:-2021-12-08 13:12:26

Question: In a photoelectric experiment for 4000 Ã… incident radiation, the potential difference to stop the ejection is 2 V. If the incident light is changed to 3000 Ã…, then the potential required to stop the ejection of electrons will be

1.2 V

2.Less than 2 V

3.Zero

4.Greater than 2 V

Posted Date:-2021-12-08 12:29:35

Question: In a single-mode fibre, how does the fraction of energy travelling through bound mode appear in the cladding?

1.As a crescent wave

2.As a gibbous wave

3.As an evanescent wave

4.All of these

Posted Date:-2021-12-08 12:00:00

Question: Resolving power of a microscope depends upon

1.The focal length and aperture of the eye lens

2.The focal length and objective of the eye lens

3.The apertures of the objective and the eye lens

4.The wavelength of light illuminating the object

Posted Date:-2021-12-08 12:24:28

Question: Resolving power of light microscope is

1.2 mm

2.0.2 mm

3.0.1 mm

4.1 mm

Posted Date:-2021-12-08 12:27:12

Question: Two parallel conductors separated by a distance 2r carries current i in the same direction. The intensity of the magnetic field midway between them is

1.Zero

2.Î¼0 i/r

3.4Î¼0 i/r

4.Î¼0 i/4r

Posted Date:-2021-12-08 13:45:37

Question: What is the inverse of resistance called?

1.Inductance

2.Conductance

3.Resistivity

4.permittivity

Posted Date:-2021-12-08 13:10:57

Question: What is the ratio of resolving power of an optical microscope for wavelengths Î»1= 4000 Ã… and Î»2= 6000 Ã…?

1.2:3

2.3:2

3.6:25

4.16:9

Posted Date:-2021-12-08 12:12:22

Question: Which among the following fibre optic cables have a core of size 480 Î¼m to 980 Î¼m and made up of polymethylmethacrylate?

1.Glass fibre optic cable

2.Plastic fibre optic cable

3.Plastic clad silica fibre optic cable

4.All of the above

Posted Date:-2021-12-08 12:00:55

Question: Which of the following is not due to total internal reflection of light?

1.Brilliance of diamond

2.Mirage formation

3.Optical fibre working

4.Rainbow formation

Posted Date:-2021-12-08 12:04:41

Question: Which of the following is the most conductive element?

1.Copper

2.Iron

3.Silicon

4.Silver

Posted Date:-2021-12-08 13:07:41

Question: A cyclotron can accelerate

1.Î² particles

2.Î± particles

3.High-velocity gamma rays

4.High-velocity X-rays

Posted Date:-2021-12-08 12:55:07

Question: A material that has zero resistance is called

1.Insulator

2.Conductor

3.Superconductor

4.semiconductor

Posted Date:-2021-12-08 13:08:25

Question: A microscope is used to focus on an object at the bottom of a beaker. The microscope is raised by 1 cm. To what height should the water be poured to bring the object in focus again. Refractive index of water is 4/3.

1.1 cm

2.4/3 cm

3.4 cm

4.3 cm

Posted Date:-2021-12-08 12:22:28

Question: A proton of energy 100 eV is moving perpendicular to a magnetic field 10-4 T. The cyclotron frequency of the proton in radian/sec

1.2.80 x 106

2. 9.6 x 103

3.5.6 x 106

4.1.76 x 106

Posted Date:-2021-12-08 12:54:05

Question: A ray of light will undergo total internal reflection if it

1.Goes from rarer medium to denser medium

2.Incident at an angle less than the critical angle

3.Strikes the interface normally

4.Incident at an angle greater than the critical angle

Posted Date:-2021-12-08 12:03:39

Question: A vertical microscope is focused on a point at the bottom of an empty tank. Then water (Î¼=4/3) is poured into the tank up to a height of 4 cm. After which a liquid that does not mix with water is poured over it up to a height of 2 cm above the water. The refractive index of the liquid is 3/2. What should be the vertical distance through which the microscope must be moved to bring the object in focus again?

1.2.61 cm

2.1.67 cm

3.5 cm

4.4.1 cm

Posted Date:-2021-12-08 12:20:04

Question: An alternating electric field of frequency f is applied across the dees (radius = R) of a cyclotron that is being used to accelerate protons (mass = m). The operating magnetic field (B) used in the cyclotron and the kinetic energy (K) of the proton, produced by it, are given by

1.B = mf/e and K= 2mÏ€2v2R2

2.B =2Ï€mf/e and K= m2Ï€vR2

3.B =2Ï€mf/e and K= 2mÏ€2v2R

4.B = mf/e and K= m2Ï€vR2

Posted Date:-2021-12-08 12:49:26

Question: Consider a circular conductor with 2m radius and 8 A current flowing through it. What is the value of magnetic field intensity at the centre of the circular conductor?

1.4Ï€ x 10-7 T

2.8Ï€ x 10-7 T

3.8 x 10-7 T

4.3Ï€ x 107 T

Posted Date:-2021-12-08 13:31:18

Question: Consider a current i flowing through the inner conductor of a coaxial cable and the current returns along the outer conductor of the cable. The value of magnetic induction at a distance r from the axis is

1.(Î¼0/4Ï€)(2i/r)

2.âˆž

3.Zero

4. (Î¼0/4Ï€)(2Ï€i/r)

Posted Date:-2021-12-08 13:28:28

Question: Cyclotron can be used in

1.Particle therapy to treat cancer

2.Particle therapy to treat cancer

3.Produce short-lived positron-emitting isotopes for PET imaging

4.All of the above

Posted Date:-2021-12-08 12:53:13

Question: Cyclotron cannot accelerate

1.Electrons

2.Neutrons

3.Positive ions

4.(Both (1) and (2)

Posted Date:-2021-12-08 12:45:31

Question: Data signal with minimum error is generated by which among the following

1.Signal processing circuits

2.Photodiode

3.Linear circuitry

4.None of the above

Posted Date:-2021-12-08 11:53:58

Question: Differentiation capacity of a compound microscope is

1.27.5 Î¼m

2.2.75 Î¼m

3.0.275 Î¼m

4.None of the above

Posted Date:-2021-12-08 12:26:07

Question: Good conductors have many loosely bound

1.Atoms

2.Protons

3.Molecules

4.Electrons

Posted Date:-2021-12-08 13:13:45

Question: High-frequency long-distance propagation mostly depends on

1.Ionospheric reflection

2.Tropospheric reflection

3.Ground reflection

4.Inverted reflection

Posted Date:-2021-12-08 13:03:59

Question: If the current I flows through the coil of radius r then the field at the centre of the circular coil is

1.Inversely proportional to I2

2.Directly proportional to I

3.Directly proportional to r

4.Inversely proportional to r2

Posted Date:-2021-12-08 13:33:05

Question: If the strength of the magnetic field at a point r near a long straight current-carrying wire is B. The value of the field at a distance r/2 will be

1. B/2

2.B/4

3.2B

4.4B

Posted Date:-2021-12-08 13:31:52

Question: 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).

1.2.1 x 10-19 J

2.8.5 x 10-19 J

3.5.3 x 10-19 J

4.3.2 x 10-19 J

Posted Date:-2021-12-08 12:39:24

Question: In an optical fibre communication system, which among the following is not a typical transmitter function?

1.Coding for error protection

2.Decoding of input data

3.Electrical to optical conversion

4.Recoding to match output standard

Posted Date:-2021-12-08 11:56:45

Question: In Kirchhoffâ€™s first law Î£i = 0 at the junction is based on the conservation of

1.Energy

2.Charge

3.Momentum

4.Speed

Posted Date:-2021-12-08 13:21:44

Question: In single-mode fibres, the cladding diameter must be at least

1.Five times the core diameter

2.Thrice the core diameter

3.Ten times the core diameter

4.Twice the core diameter

Posted Date:-2021-12-08 12:07:22

Question: Kirchhoffâ€™s Current Law is based on

1.The charge can be accumulated at the node

2.Charge cannot be accumulated at the node

3.Energy is stored at the node

4.Depending on the circuit charge can be accumulated at the circuit

Posted Date:-2021-12-08 13:23:56

Question: Light of wavelength 4000 Ã… is incident on a sodium surface for which the threshold wavelength of photo-electrons is 5420 Ã…. The work function of sodium is

1.5 eV

2. 3 eV

3.2.29 eV

4. 0.57 eV

Posted Date:-2021-12-08 12:30:30

Question: Mathematical prediction of radio waves was done by

1.Einstein

2.Hertz

4.Maxwell

Posted Date:-2021-12-08 12:58:01

Question: Photocell is a device to

1.Store photons (b) (c) (d)

2.Measure light intensity

3.Convert photon energy into mechanical energy

4.Store electrical energy for replacing storage batteries

Posted Date:-2021-12-08 12:32:09

Question: Photoelectric effect was explained by

1. Einstein

3.Plank

4.Hertz

Posted Date:-2021-12-08 12:28:50

Question: Photoelectrons stopping potential depends on

1.Frequency of incident light and nature of the cathode material

2.The intensity of the incident light

3.The frequency of the incident light

4.Nature of cathode material

Posted Date:-2021-12-08 12:33:26

Question: Photoelectrons stopping potential depends on

1.Frequency of incident light and nature of the cathode material

2.The intensity of the incident light

3.The frequency of the incident light

4.Nature of cathode material

Posted Date:-2021-12-08 12:33:29

Question: Radio waves sometimes bend around the corners due to

1.Reflection

2.Diffusion

3.Refraction

4.Diffraction

Posted Date:-2021-12-08 13:01:52

Question: Radio waves would strongly reflect off

1.A flat insulating surface of the right size

2.A flat metallic surface of the right size

3.A flat dielectric surface of the right size

4.A flat body of water

Posted Date:-2021-12-08 13:00:54

Question: Suppose a cyclotron is operated at an oscillator frequency of 12 MHz and a dee radius of 53cm. What is the resulting kinetic energy of the deuterons?

1.16.6 MeV

2.12 MeV

3.15 MeV

4.14 MeV

Posted Date:-2021-12-08 12:48:02

Question: The algebraic sum of voltages around any closed path in a network is equal to

1.Infinity

2.1

3.0

4.Negative polarity

Posted Date:-2021-12-08 13:22:34

Question: The angular frequency of a cyclotron is independent of

1.Speed

2.Mass

3.Magnetic field

4.Charge

Posted Date:-2021-12-08 12:43:11

Question: The cyclotron frequency of an electron grating in a magnetic field of 1 T is approximately

1.28 MHz

2.280 MHz

3.2.8 GHz

4.28 GHz

Posted Date:-2021-12-08 12:46:16

Question: The electric field and magnetic field of a radio wave are

1.Perpendicular to each other

2.Perpendicular to the direction of propagation

3.Both a and b

4.None of the above

Posted Date:-2021-12-08 12:58:55

Question: The energy gap is maximum in

1.Conductors

2.Semiconductors

3.Insulators

4.Superconductors

Posted Date:-2021-12-08 13:11:36

Question: The energy of emergent protons in MeV from a cyclotron having a radius of its dees 2 m and applied magnetic field 0.8 T is (mass of proton = 1.67 x 10-27 kg).

1.0.961 x 10-11 J

2.1.22 x 10-11 J

3.1.5 x 10-12 J

4.12 x 10-11 J

Posted Date:-2021-12-08 12:51:45

Question: The fibres not used nowadays for optical fibre communication system are

1.Single-mode fibre

2.Multimode fibre

3.Coaxial cable

Posted Date:-2021-12-08 12:06:01

Question: The fibres not used nowadays for optical fibre communication system are

1.Single-mode fibre

2.Multimode fibre

3.Coaxial cable

Posted Date:-2021-12-08 12:08:12

Question: The magnetic field due to a copper rod carrying direct current is

1.The magnetic field is inside the rod

2.The magnetic field is outside the rod

3.Both inside and outside the rod

4.Neither inside nor outside

Posted Date:-2021-12-08 13:27:37

Question: The magnification power of a compound microscope does not depend upon

1.The focal length and aperture of the eye lens

2.The apertures of the objective lens

3.Tube length of the microscope

4.None of the above

Posted Date:-2021-12-08 12:25:21

Question: The maximum kinetic energy of the positive ion in the cyclotron is

1.qBR2/2m

2.q2B2R2/2m

3.q2B2R2/2m

4.qBR/m

Posted Date:-2021-12-08 12:44:40

Question: The minimum energy required to remove an electron is called

1.Stopping potential

2.Kinetic energy

3.Work function

4.None of these

Posted Date:-2021-12-08 12:41:44

Question: The objective and the eye-piece of the compound microscope having a focal length of 0.95 cm and 5 cm, respectively, are kept at a distance of 20 cm. At a distance of 25 cm the large image is formed. Calculate the total magnification.

1.84

2.80

3.94

4.75

Posted Date:-2021-12-08 12:14:22

Question: The radio waves were demonstrated experimentally by

1.Hertz

2.Maxwell

3.Marconi

4.Armstrong

Posted Date:-2021-12-08 13:06:45

Question: The resistance of the conductor is directly proportional to

1.Length

2.Area of cross-section

3.Temperature

4.resistivity

Posted Date:-2021-12-08 13:14:42

Question: The speed of radio wave in free space is

1.3 x 106 metres/second

2.3 x 108 metres/second

3.3 x 106 miles/second

4.3 x 108 miles/second

Posted Date:-2021-12-08 12:59:44

Question: 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

1.0.6 V

2.0.3 V

3.1.2 V

4.2.4 V

Posted Date:-2021-12-08 12:35:52

Question: The terminal potential difference will be greater than its emf when it is

1.In open circuit

2.Being charged

3.Being charged or discharged

4.Being discharged

Posted Date:-2021-12-08 13:24:52

Question: To which law of electricity is Biot Savart law of magnetism analogous to

1.Coulombâ€™s law

2.Ohmâ€™s law

3.Kirchoffâ€™s law

Posted Date:-2021-12-08 13:29:21

Question: Two identical glass (Î¼g=3/2) equi â€“ convex lenses of focal length f each are kept in contact. The space between the two lenses is filled with water ((Î¼w=4/3). The focal length of the combination is

1.f/3

2.f

3.4f/3

4.3f/4

Posted Date:-2021-12-08 12:13:12

Question: Using a microscope a glass plate of 5 mm is viewed from the above. The microscope is lowered by 3 mm to view the bottom surface of the glass. What is the refractive index of the glass?

1.2

2.1.66

3.2.25

4.1.4

Posted Date:-2021-12-08 12:21:04

Question: What is the distance from the far end of the ground wave to the nearest point where the sky wave returns to earth called?

2.maximum usable frequency

3.Skip distance

4.Skip zone

Posted Date:-2021-12-08 13:05:21

Question: What is the value of the maximum kinetic energy acquired by electron due to radiation of wavelength 100 nm?

1.12 eV

2.6.2 eV

3.100 eV

4.300 eV

Posted Date:-2021-12-08 12:34:25

Question: When the cells are connected in parallel, then

1.The current increases

2.The current decreases

3.The emf increases

4.The emf decreases

Posted Date:-2021-12-08 13:25:37

Question: Which among the following is described by the concept of numerical aperture in an optical fibre?

1.Light collection

2. Light scattering

3.Light dispersion

4.Light polarisation

Posted Date:-2021-12-08 11:55:17

Question: Which among the following is not an insulator?

1.Wool

2.Plastic

3.Silver

4.Paper

Posted Date:-2021-12-08 13:09:49

Question: Which basic law should be followed to analyse the circuit?

1.Newtonâ€™s law

3.Amperes law

4.Kirchoffâ€™s law

Posted Date:-2021-12-08 13:20:50

Question: Which is the equation of the magnetic field according to Biot-Savartâ€™s law?

1.IdIsinÎ¸/r2

2. (Î¼0/4Ï€)IdIsinÎ¸/r

3. (Î¼0/4Ï€)IdIsinÎ¸/r2

4.(Î¼0/4Ï€)IdIsinÎ¸

Posted Date:-2021-12-08 13:26:41

Question: Which of the following are electromagnetic

2.Light

3.Gamma waves

4.All the above

Posted Date:-2021-12-08 13:06:05

Question: 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?

1.Absorption

3.Baffling

4.skip

Posted Date:-2021-12-08 13:02:41

Question: Which of the following properties cannot be calculated from Biot Savart law?

1.Magnetic field intensity

2.Flux density

3.Permeability

4.Electric field intens

Posted Date:-2021-12-08 13:30:07

Question: Why is copper a preferred choice in making electrical wires?

1.Copper is a good conductor of electricity

2.Poor conductors of electricity

3.Insulators

4.Superconductor

Posted Date:-2021-12-08 13:09:15

Question: With the increase in temperature the resistance of semiconductors

1.Decreases

2.Increases

3.Remains constant

4.Initially increases and then decreases

Posted Date:-2021-12-08 13:16:19

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