NEET Physics (Conceptual)


Wed,March 14, 2018 12:40 AM


1) Which of the following statement is correct

State A : Source motion effects the wave length but observer motion effects the number of waves received by him.
State B : The apparent change in frequency depends on the distance between source and observer
State C : The echo and the direct note differ both in speed and intensity.
1) Only A 3) A,B & C
2) B, C only 4) A, C only


2) It is desired to increase the fundamental resonance frequency in a tube which is closed at one end. This can be achieved by?

State A: Replacing the air in the tube by hydrogen gas.
State B: Decreasing the length of the tube.
State C: Opening the closed end of the tube.
1) A,B,C are true
2) Air only true
3) C is only true
4) A&C are true.


3) Hygen’s Principle of secondary wavelets can be used to

State A: Deduce the laws of reflection of light
State B: Deduce the laws of refraction of light.
State C: Explain the transverse nature of light waves
1) A,B only 3) B,C only
2) A,C only 4) A,B,C.


4) When unpolarized light is incident on a tourmaline crystal of proper thickness?

State A: It exhibits dichroism
State B: it absorbs ordinary ray and transmits extraordinary ray.
State C: It absorbs extraordinary ray and transmits ordinary ray
1) Only A,B are true
2) Only A & C are true
3) Only B & C are true
4) All are true


5) Select the correct statement

State A: When ‘r’ identical magnets are arranged in the form of closed polygon unlike poles nearer, the resultant magnetic moment is zero
State B: It one magnet is removed from the polygon the resultant magnetic moment becomes ‘M’
State C: If one magnet is reversed in the polygon the resultant magnetic moment of combination becomes 2M
1) A,B and C are correct
2) A and B are correct but C is wrong
3) only A is correct
4) A, B & C are wrong


6) Which of the following statement is correct

State A: Soft iron conducts electricity
State B: Soft iron is magnetic material
State C: Soft iron is used as electro magnet
1) Only A is correct
3) A and C are correct
2) Only B is correct
4) A, B, C are correct


7) A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated along its axis, then

State A: A current will be induced in the coil
State B: No current will be induced n the coil
State C: Only e.m.f. will be inducted in the coil
1) A is correct 2) B is correct
3) C is correct 4) All are correct


8) Fuse wire is a wire of

State A: Low melting point & low value of a
State B: High melting point & high value of a
State C: Low melting point & high value of a
1) Only A 2) Only B
3) A and B only 4) C only


9) A bullet hits a block at rest on frictionless horizontal surface and gets embedded into it. The physical quantity associated with the block that remains unchanged is?

a) Linear momentum
b) Kinetic energy
c) Temperature
d) Gravitational potential energy


10) Mercury is used in liquid thermometers because it has ?

a) High specific heat and high conductivity
b) High specific heat and low conductivity
c) Low specific heat and low conductivity
d) Low specific heat and High conductivity


11) A temperature ‘T’ is measured by a constant volume gas thermometer

a) ‘T’ is independent of the gas used at all pressures
b) ‘T’ is independent of the gas used only at high pressures
c) The ideal gas scale agrees with the absolute scale of temperature
d) The ideal gas scale does not agree with the absolute scale of temperature


12) A constant volume gas thermometer works on

a) Archimede’s Principle
b) Pascal’s law
c) Boyle’s law d) Charles law


13) Thermostat works on the principle of

a) On heating metal expands
b) Unequal expansions of different metals on heating
c) Both (1) & (2) d) None


14) If a glass prism is dipped in water, its dispersive power

a) Increases b) Decreases
c) Does not change
d) May increase (or) decreases depending on whether the angle of the prism is less than (or) Greater than 600


15) When the length of a microscope tube increases it magnifying power?

a) Decreases b) Increases
c) Does not change
d) May decrease or increase


16) Finger prints are observed by the use of

a) Telescope b) Microscope
c) Gallilean telescope
d) Concave lens


17) In the young’s double slit experiment the fringe width depends upon?

a) Distance between the two slits
b) Distance between the slits and the screen
c) Wave length of light
d) All the above


18) Which one of the following phenomena is not explained by Huygens construction of wave front

a) Refraction b) Reflection
c) Diffraction d) Origin of spectra


19) On increasing the temperature of a conductor, it resistance increases because

a) Rate of collision increases
b) Mass of the electron increases
c) Electron density decreases
d) None


20) wires of Nichrome and copper of equal dimensions are connected in series in electrical circuit, then

a) More current will flow in copper wire
b) More current will flow in Nichrome wire
c) Copper wire will get heated more
d) Nichrome wire will get heated more


21) With the increase of temperature the specific resistance of metal

a) Increases b) decreases
c) Does not change d) None


22) For making standard resistance wire of following material is used

a) Nichrome b) Copper
c) Silver d) Manganin


23) The phenomenon used in optical fibres, for transmission of light energy is

a) Total internal reflection
b) scattering
c) diffraction d) Refraction


24) The image formed by a concave mirror

a) Is always real
b) Is always virtual
c) Is certainly real if the object is virtual
d) Is certainly virtual if the object is real


25) Out of dia, para and ferromagnetism the universal property of all substances is

a) Diamagnetism
b) Paramagnetism
c) Ferro magnetism
d) Anti ferromagnetism


26) The susceptibility of a diamagnetic substance is

a) 00 b) Zero
c) Small but negative
d) Small but positive


27) A magnetic needle is kept in a non uniform magnetic field it experiences

a) a force and a torque
b) a force but not torque
c) Torque but not force
d) Neither a torque nor a force


28) Alternating current cannot be measured by direct current meters, because

a) The average value of current for complete cycle is zero
b) Alternating current cannot pass through an ammeter
c) Some amount of alternating current is destroyed in the ammeter
d) Peak value of current is zero


29) A cylindrical bar magnet is kept along the axis of a circular coil, if the magnet is rotated along is axis then

a) A current will be induced in the coil
b) No current will be induced in the coil
c) Only e.m.f will be induced in the coil
d) both e.m.f and current will be induced in the coil


30) Two identical circular loops of metal wire are lying on a table without touching each other loop A carrier a current which increases with time, in response, the loop B

a) Remains stationary
b) In attracted by the loop A
c) is repelled by the loop A
d) Rotates about its centre of mass with centre of mass fined


31) Which of the following statement is correct about the stationary waves?

State A: All the particles of the medium vibrate in the same phase
State B: particles at the consecutive anti nodes differ in phase by π
State C: particles at the consecutive anti nodes are in the same phase
a) A, C only b) B & C
c) Only B d) A, B & C


32) Which of the following statement is correct?

State A : If the incident rays are converging, we have a real object
State B : If the final rays are converging, we have a real image
State C : The image of a virtual object is called a virtual image
a) A only b) B only
c) C only d) A,B & C


33) Which of the following statements are true in the context of a compound microscope?

State A : Each lens produces a virtual and inverted image
State B : the objective has a very short focal length
State C : The eye piece is used as a simple magnifying glass
a) A & C only b) A & B only
c) B & C d) A,B & C only

34) Which of the following statement is true in the image of an extended object. Placed perpendicular to the principal axis of a mirror will be erect it

State A : The object and the image are both real
State B: The object is real but the image is virtual
State C: The object is virtual but the image is real
a) A & B b) B & C
c) A & C d) A,B & C only


35) In which of the following statements do we obtain a spherical wave front?

State A : Sunlight focused by a concave lens?
State B: Light diverging from a straight slit
State C: Light emitted by a point source in an isotropic medium
a) A & B only b) B & C only
c) A, C d) A,B , C


36) When light is polarized by reflection from a transparent source ?

State A: Reflected and refracted rays are mutually perpendicular
State B: Both reflected and refracted rays are plane polarized
State C: Refracted ray is partially polarized
a) A & B b) B & C
c) A & C d) Only C


37) Newton’s law of cooling is applicable when?

State A: Temperature of every part of the body is same
State B: Hot body is cooled in uniform streamlined flow of air
State C: Heat is lost only by radiation
a) A & B b) B & C
c) A & C d) All the above


38) Pick up the correct statement

State A: Sun’s temperature is measured by a pyrometer
State B: Insects temperature is measured by thermo electric thermometer
State C: Temperature of human body is measured by mercury thermometer
a) A and B are true
b) B and C are true
c) C and A are true
d) A,B,C are true


39) which of the following statements are true

State A: Rubber contracts on heating
State B: Water expands on heating
State C: Water contracts on heating from OO C to 4OC
a) A is true
b) B and A are true
c) A and C are true d) All are true


40) Which of the following statement is correct

State A: Generally solids are better conductors than liquids
State B: Liquids are better conductors than gases
State C: Metals are much better conductors than non-metals
a) A, B are true b) B, C are true
c) C, A are true d) All are true


41) For a good cooking vessel, the necessary characteristics are

State A: Large thermal conductivity
State B: Small specific heat
State C: Small coefficient of expansion
a) A, B are true b) B, C are true
c) C, A are true d) All are true


42) When a bar magnet is suspended freely in a uniform magnetic field identify the correct statement

State A: The magnet experiences only couple and undergoes only rotary motion
State B: The direction of torque is along the suspensive wire
State C: The magnitude of torque is maximum when the magnet is normal to the field direction
a) Only A and C are correct b) Only a and B are correct
c) Only B and C are correct d) A,B,C are correct


43) Choose the correct statement

State A: The difference of potential between the terminals of a cell in closed circuit is called emf of the cell.
State B: The internal resistance of an ideal cell is infinity.
State C: The difference between the emf of a cell and potential difference across the ends of the cell is called ‘lost’ volt.
a) A,B,C correct b) A only
c) B only d) C only correct


44) The terminal pd of a cell is equal to its emf if

State A: External resistance is infinity
State B: Internal resistance is zero
State C: External resistance zero and internal resistance infinity
a) A&B correct
b) B&C Correct
c) A&C Correct
d) A,B,C correct


45) Potentiometer can be used

State A: for measurement of emf of cell
State B: to determine internal resistance of cell
State C: for the calibration of Ammeter and voltmeter
a) A&B only b) B&C only
c) A&C d) A,B,C correct


46) The meter bridge can be used

State A: to determine the unknown resistance
State B: To compare two resistances
State C: To determine the specific resistance of the material of a wire
a) Only A & C correct b) Only A & B correct
c) B & C correct
d) all are correct


47) Sensitivity of potentiometer can be increased by

State A: Increasing series resistance in the primary circuit
State B: Using thin and high resistivity wire as potentiometer wire
State C: increasing the length of wire
a) A & C correct
b) B & C correct
c) A & B correct
d) All are correct


48) Which of the following statement is correct

State A: When external forces are involved momentum of the system is not conserved
State B: When stationary bomb explodes, energy released is converted to K.E. of fragments
State C: When rubber ball hits the wall its kinetic energy is not conserved
a) A & C b) A&B
c) A, B, C true d) A, B, C are false


49) which of the following is correct in the case of internal force can change

State A: Kinetic energy
State B: Total momentum of system
State C: Total energy of the system
a) A only b) B only
c) C only d) All the above


50) When a satellite is lifter from a lower orbit to higher orbit

State A: Kinetic energy decreases
State B: Gravitational potential energy increases
State C: Kinetic energy & gravitational potential energy decreases
a) A&B correct b) C only
c) ABC correct d) A & C


51) Potentiometer can be used

State A: for measurement of emf of cell
State B: To determine internal resistance of cell
State C: for the calibration of ammeter and voltmeter
1) A&B only 2) B&C only
3) A and C 4) A,B,C correct


52) Wheat stone bridge can be used?

State A: to compare two unknown resistances
State B: to measure small strains produced in hard metals
State C: as the working principle of meter bridge
1) A only 2) B only
3) C only 4) A, B & C


53) Choose the correct statement

State A: In an elastic collision, momentum is conserved but K.E. is not conserved
State B: In an in elastic collision, momentum is conserved but K.E. is not conserved
State C: In an in elastic collision both momentum and K.E are conserved
1) A only 2) B only
3) C only 4) A,B&C


54) Pick up the correct statement

State A: Sun’s temperature is measured by a pyrometer
State B: In sects temperature is measure by thermo electric thermometer
State C: Temperature of human body is measured by mercury thermometer.
1) A and B are true
2) B&C are true
3) C&A are true
4) A,B,C are true


55) Which of the following statement is correct

State A: When a body slides on rough surface its momentum is not conserved
State B: When a ball falls from a height, momentum of earth ball system is conserved
State C: In case of explosion of flying bomb momentum is conserved.
1) A,B are true 2) A,B,C are true
3) A, C are false 4) A is false


56) Which of the following is correct in the case of conservative force?

State A: Work done is independent of the path
State B: Work done in a closed loop is zero
State C: Work done against conservative force is stored in the form of potential energy.
1) A,B,C are true 2) A only
3) B only 4) A & C only


57) When a planet moves around the sun?

State A: Its angular momentum remains constant
State B: Its moves faster when it is near to the sun
State C: Its potential energy decreases when it goes near to the sun
1) A &B 2) B&C
3) A&C 4) A B C true


58) Suppose universal gravitational constant starts to decrease then?

State A: Length of the year will increase
State B: Earth will follow a spherical path of decreasing order
State C: Kinetic energy of earth will decrease
1) A & B are true
2) A &C are true
3) B & C 4) all are true


59) By properly combining two prisms made of different materials is possible to

State A: Have dispersion without average deviation
State B: Have deviation without dispersion
State C: have both dispersion and average deviation
1) A & B only 2) B &C only
3) A, C only 4) A, B and C


60) If white light is used in young’s double slit experiment

State A: Bright white fringe is formed at the centre of the screen
State B: Fringes of different colours are observed on both sides of central fringe clearly only in the first order
State C: The first order violet fringes are closer to the centre of the screen than the first order red fringes.
1) Only A and C 2) Only A and B
3) Only A 4) All are true


61) The bulbs of two identical thermometers A and B are coated one with lamp black and the other with silver. Both are exposed to sun then.

State A: Initial reading of A is more than that of B
State B: Final temperature of both is same.
State C: Final temperature of both is different.
1) A and C 2) A and B
3) B &C 4) Only B


62) Which statement correct in coefficient of thermal conductivity

State A: depends upon nature of the material of the body
State B: Is independent of dimensions of the body
State C: Depends on temperature gradient.
1) A and B 2) B and C
3) Only A 4) All the above
Sreenivas

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