IIT JEE Physics Solved Model Question paper

Will you please provide me the Physics Model Question paper of IIT JEE Exam????

Here, I am giving you Model paper of the IIT JEE physics, take a look on following questions.

Arno the following the intensive property is (properties are) A) molar conductivity B) electromotive force
C) resistance D) heat capacity

If the 0.05 molar solution of W is replaced by a 0.0025 molar M solution. then the magnitude of the cell potential would be
A) 35 mV B) 70 my
C) 140 mV D) 700 mV

A real gas behaves like an ideal gas if its

A) pressure and temperature are both high
B) pressure and temperature are both low
C) pressure is high and temperature is low
Di pressure is low and temperature is high

An AC voltage source of variable angular frequencies ai and fixed amplitude V. is connected in series with a capacitance C and an electric bulb of resistance R
(inductance zero). When 0) is Increased
A) the bulb glows dimmer
B) the bulb glows brighter
C) total impedance of the circuit is unchanged
D) total impedance of the circuit increases

Three concentric metallic spherical shells of radii 1?, 21?, 31?, are given charges Q, Q , respectively. It is found that the surface charge densities on (lie outer sur1icus of the shells are equal. Then, the ratio of the charges given i. the shells, Q1 : Q2 : Q.3, is A 1:2:3
B 1:3:5
C 1:1:9
D 1:8:18
Question 2

A student performed the experiment to measure the speed of sound in air using resonance air-column method, Two resonances in the air-column ware obtained lowering The water level. The resonance with the shorter air-column is the first resonance and that with the longer air-column is the second resonance. Then. A the intensity of the sound heard at the first resonance was more than that at the second resonance
B the prongs of the tuning fork were kept in a horizontal plane above the resonance tube
C the amplitude of vibration of the ends of the prongs is typically around 1 cm
D the length of the air-column at the first resonance was somewhat shorter than 1/4th of the wavelength of the sound in air
Question 3

Consider a thin square sheet of side L and thickness t. made of a material of resistMtv p. The resistance between two opposite faces, shown by the shaded areas iii the figure is A directly proportional to L
B directly proportional to t
C Independent of L
D independent of t
Question 4

A Vernier calipers has 1 mm marks on the main scale. It has 20 equal divisions on the Vernier scale which match with 16 main scale divisions. For this Vernier calipers. the least count is A 0.02 mm
B 0.05 mm
C 0.1 nun
D 0.2 mm
Question 5

A police car with a siren of frequency 8 kHz is moving with uniform velocity 36 km/hr towards a tall building which reflects the sound waves. The speed of sound in air is 320 m/s. The frequency of the siren heard by the car driver is A 8.50 kHz
B 8.25 kHz
C 7.75 kHz
D 7.50 kHz
Question 6

A ball of mass 0.2 kg rests on a vertical post of height 5 m. A bullet of mass 0.01 kg, traveling with a velocfty V m/s in a horizontal direction, hits the centre of the ball. After the collision, the ball and bullet travel independently. The ball hits the ground at a distance of 20 m and the bullet at a distance of 100 m from the foot of the post. The initial velocity V of the bullet is A 250 m/s
B 250J m/s
C 400 m/s
D 500 m/s
Question 7

43. A ball is dropped from a height of 20 m above the surface of water in a lake. Tue refractive index of water is 4/s. A fish inside the lake, in the line of fall of 11w hall, is looking at the ball. At in instant, when the ball is l2.8 m above the water surface, the fish aces the speed of ball as A 9 m/s
B 12 m/s
C 16 m/s
D 21.33 m/s
Question 8

45. The figure shows the P-V plot of an ideal gas taken through a cycle ABCI)A. The part AIW is a semi-circle and CDA is half of an ellipse. Then, A the process during (1w path A —, B is isothermal
B heat flows out of the gas during the path B — C — 1)
C work done during the path A B , C is zero
D positive work is done by the gas in the cycle ABCDA
Question 9

58. A real gas behaves like an ideal gas if itsA pressure and temperature are both high
B pressure and temperature are both low
C pressure is high and temperature is low
D pressure is low and temperature is high
Question 10

40. A hollow pipe of length 0.8 m Is closed at one end. At its open end a 0.5 m long uniform string is vibrating in its second harmonic and it resonates with the fundaniental frequency of the pipe. If the tension in the wire is 50 N and the speed of sound is 320 ms, the mass of the suing is A 5 grams
B 10 grams
C 20 grains
D 40 grams
Question 11

29. A meter bridge is set-up as shown, to determine an unknown resistance ‘X’ using a standard 10 ohm resistor. The galvanometer shows null point when tapping-key is at 52 cm mark. The end-corrections are 1 cm and 2 cm respectively for the ends A and B. The determined value of ‘X’ is A 10.2 ohm
B 10.6 ohm
C 10.8 ohm
D 11.1 ohm








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II P.U.C Mathematics Question Paper.pdf (1.30 MB, 67 views)

Yeah sure, here I am providing you the Physics Model Question paper of IIT JEE Exam

1. N molecules each of mass m and v velocity collides with a wall of a container and

then absorbed, the pressure applied on the wall is :

(1) mNV2

3 2

2. The law of far a day is obtained by conservation of :

(1) Charge (2) Energy (3) Energy and magnetic field (4) Magnetic field

3. There is a q charge placed in the centre of a cube, then the emergent flux is :

(1) q (2) q (3) q (4) q_

6∈0 8 ∈0 2 ∈0 ∈0

4. Two thin lenses are put close to each other, focal length of the combination is :

(1) less than the small focal length

(2) more than the bigger focal length

(3) equal to the arithmetical average of the focal length

(4) equal to the geometrical average of the focal length

5. A car is moving on a horizontal circular path with 10 m/s constant speed. A rigid

body is suspended from ceiling of car with a 1 m. long light rod, the angle between

rod and path is :

(1) 600

(2) 450

6. Two sources of E1 and E2 emf r1 and r2 internal, resistances, are connected in the

parallel combination, the emf of the combination is :

(1) E1E2 (2) E2r1 + E1r2 (3) E1r1 + E2r2 (4) E1 + E2

E1+E2 r1 + r2 r1 + r2 2

7. In a AC circuit R = 0 ΩΩ, XL = 8ΩΩ and XC = 6ΩΩ phase difference between voltage

and current is :

(2) 450

(1) 110


8. Relative permeability of a medium is µµ r and relative permittivity is ∈∈ r then the

velocity of an electro magnetic wave is :

(1) c (2) √∈rµr (3) √µ0t0 (4) 1

∈0µ0 µr∈r µr∈r

(2) mNV2

(3) 2 mNV2

(4) mNV2

(3) 300

(4) zero

(3) 370

(4) 120


√ µr∈r

9. Ration of radius of two soap bubbles is 2 : 1 then the ratio of their excess

pressure is :

(1) 2 : 1 (2) 4 : 1 (3) 1 : 4 (4) 1: 2



10. Ratio of sound velocities is H2 and O2 will be :


(1) 32 : 1 (2) 1 : 4 (3) 16 : 1 (4) 4 : 1
11. In which of the waves the energy is not propagated :

(1) em waves

(2) longitudional waves

(3) stationary waves

(4) transverse waves

12. A body of 2 kg. mass is moving under a force, relation between time and

displacement is x = t3

is : 3

(1) 1.6 J (2) 16 J (3) 160 J (4) 1600 J

13. A uniform chain of L length and M mass, two third part of chain is on a

frictionless table and one third part is vertically suspended, work done to pull the

whole chain on table, is :

(1) MgL (2) MgL (3) MgL (4) MgL

18 9 6 3

14. If the intensity and frequency of incident light is doubled then :

(1) photo electric current will become is times

(2) kinetic energy of the emitted electron will be increased and current will be 2 times

(3) kinetic energy of electrons will be 4 times

(4) the kinetic energy of electrons will be 2 times


15. A car travels half distance with 40 kmph and rest half distance with 60 kmph

then the average speed of car is :

(1) 60 kmph (2) 52 kmph (3) 48 kmph (4) 40 kmph

16. Two particle are moving with same velocities in the circular paths of r1 and r2

radius then the ratio of their centripetal forces is :



(1) r2 (2) r2 (3) r1 2 (4) r2 2

r1 √ r1 r2 r1


17. No. of electrons in the 92 U 235 nucleus is :


(1) 143 (2) 235 (3) 92 (4) zero

where x in meter and t in time work done in first two seconds

18. The wavelength of photon and electron is λph and λe and energy (E) of the two is

same then :

(1) the difference can be obtain if E is given

(2) λe>λph

(3) λph . λe

(4) λph=λe

19. A lift is moving with acceleration a in upward direction then the force applied by

mass m on the floor of lift will be :

(1) ma (2) m(g-a) (3) m(g+a) (4) mg



20. Two cars of m1 and m2 mass are moving in the circular paths of r1 and r2 radius,

their speed is such that they travels one cycle in the same time, the ratio of their

angular velocities is :

(1) m1r1 : m2r2 (2) 1 : 1 (3) r1 : r2 (4) m1 : m2



21. A ring of mass M, radius r is moving with angular velocity w, if another two

bodies each of mass m is placed on its diameter, the resultant angular velocity will

be :

(1) w(M + 2m) (2) w(M – 2m) (3) wM (4) wM

M (M + 2m) (m+m) (M+2m)


22. The wavelength of 1 ke V photon 1.25 x 10-9 m the frequency of Me V photon

will be:

(1) 1.24 x 1023 (2) 2.4 x 1023 (3) 2.4 x 1023 (4) 1.24 x 1015



23. Size of nucleusis of the order of :

(1) 10-13 cm (2) 10-10 cm. (3) 10-8 cm. (4) 10-15 cm.



24. If MI, angular acceleration and torque of body is I, ∝ and τ, it is revolving with

ω angular velocity then :

(1) τ = α (2) M= 1 (3) τ= Iα (4) τ=Iω

I α

25. In a uniform circular motion :

(1) both acceleration and speed changes

(2) both acceleration and speed are constant

(3) both acceleration and velocity are constant

(4) both acceleration and velocity changes



26. Ratio of average kinetic evergies of H2 and O2 at a given temp. is :

(1) 1 : 1 (2) 1 : 4 (3) 1 : 8 (4) 1 : 16

27. To make the working of a machine, free of magnetism, the cover of this machine

must be of :

(1) non magnetic substance

(2) diamagnetic substance

(3) paramagnetic substance

(4) ferro magnetic substance


28. λα, λβ and λr are the wavelengths of k α , kβ and kr lines of X-ray spectrum then :


(1) λβ >λa>λr (2) λα < λB<λr (3) λα > λβ > λr (4) λα = λβ = λr

29. Angular momentum of electron of H atom is proportional to :

(1) 1 (2) 1 (3) √r (4) r2

r √ r



30. MI, rotational kinetic energy and angular momentum of a body is I, E and L

then :



(1) E= L2

(2) E2

2I L 2I


31. In a diode value, the state of saturation can be obtained easily by :

(1) high plate voltage and high filament

(2) low filament current and high plate voltage

(3) low plate voltage and high plate tem

(4) high filament current and high plate voltage



32. A magnet is dropped in a long coppertube vertically, the acceleration of magnet :

(1) equal to g (2) less than g (3) zero (4) greater than g

33. Joule-second is unit of :

(1) rotational power

(2) angular momentum

(3) rotational energy

(4) torgue



34. A 3 coulomb charge enerts 3000 N force in a uniform electrical field, the

distance between two points is 1 cm. potential difference will be :

(1) 9000 V (2) 1000 V (3) 90 V (4) 10 V



35. 1000 drops, each v volt, are combined to form a big drop, then the potential of

the drop will be how many times :

(1) 1 (2) 10 (3) 100 (4) 1000


36. A plane is revoloving around the earth with 100 km./hr. speed at a earth, the

changes in the velocity as it travels half circle is :



(1) 100 √2 kmph (2) 150 kmph (3) 200 kmph (4) zero

37. 3 x 107 kg. water is initially constant and it is displaced 3 m. by applying 5 x 104

N force. Velocity of water will be (if resistance of water is zero) :

(1) 50 m/sec. (2) 0 1 m/sec. (3) 60 m/sec. (4) 1.5 m/sec.

= 2I (3) E = 2IL (4) L = E2

38. In a wheat stone circuit P = Q = 10Ω and R = S = 15 Ω and G = 20 Ω. If a cell of 1.5

volt emf is used, the current drawn from the cell is :

(1) 0.021 amp (2) 0.025 amp (3) 0.060 amp (4) 0.125 amp



39. Two waves of same frequency and different amplitude, if the phase difference is π/2

then the Lissajou’s figure will be :

(1) 8 shape (2) an ellipse (3) a circle (4) a straight line

40. A monoatomic gas (r = 5/3) and a diatomic gas (r= 7/5) are mixed in equal ratio then

the r of mixture will be :

(1) 3.07 (2) 1.53 (3) 1.5 (4) 1.4

41. Velocity of e.m. waves in paraffine is 2.07 x 108

(1) 2.10 (2) 1.87 (3) 1.45 (4) 1.22



42. After emission of a β-particle, the nucleus :

(1) A – 4, Z – 2 (2) A,Z-1 (3) A, Z-2 (4) A + 2, Z


43. Charge on a proton is 9.6 x 107 c/kg. A proton is moving in a 1T magnetic field in 0.5

m radius circular path, the energy of proton in Mev.

(1) 16.34 (2) 12.02 (3) 8.25 (4) 4.84



44. If d2

ω + αx = 0 then the angular frequency will be :

dx2


(1) √α (2) α2



45. Noble prize presented to Einstein for :

(1) therories of LASER

(2) photo electric effect

(3) theory of relativity

(4) theory of specific heat in solids

46. Before saturation current the ratio of plate currents at 400 v and 200 v plate voltage

is:

(1) 1 (2) 2 (3) 2√2 (4) √2

2 4

47. If I = I0 sin (ω t - π/2) and E = E0 sin ωt then the power loss is :

(1) EI (2) E0I0 (3) E0I0 (4) zero

√2 2 √2

48. If the temp. of an ideal gas filled in a container is increased 10

pressure is 0.4%, the initial temp. of the gas is :

C (2) 2000

(1) 1200

49. Plate resistances of two triode values is 2KΩ and 4KΩ, amplification factor of each

of the value is 400

resistance, will be :

(1) 10 (2) 4/4 (3) 4/3 (4) 16/3


m/sec. then the dielectric constant is:

(3) α (4) zero

K (3) 2500

K (4) 2500

C

. The ratio of voltage amplifications, when used with 4kΩ load

50. Relation between displacement x and time t is x = 2 – 5t + 6t2

be:

(1)-3 m/sec. (2) 12 m/sec. (3) 2 m/sec. (4) – 5 m/sec.



51. Focal length of a convex lens is 16 cm. it is dipped in water. The refractive indices of

the substance of lens and water are 1.5 and 1.33 resp., now the focal length will be :

(1) 64 cm. (2) 18 cm. (3) 24.24 cm. (4) 16 cm.


52. In a half wave rectifier circuit, the input signal frequency is 50 Hz, the the output

frequency will be :

(1) 25 Hz (2) 50 Hz (3) 200 Hz (4) 100 Hz



53. In the following circuit :

B A P

C D Q

(1) the loop will be displaced along the length of wire

(2) PQ unchanged

(3) the loop will repell the wire

(4) wire will attract the loop


54. In a triode the ratio of small change in plate voltage and small changes in grid

voltage is, if plate current is constant :

(1) DC plate resistance

(2) mutual conductance

(3) AC plate resistance

(4) amplification factor


55. Two particles accelerated with same voltage eneters in a uniform magnetic field

perpendicularly, the radii of the circular paths is R1 and R2, the charge on particles is

same the ratio of m1 is :

2 m2 2

(1) R2 (2) R2 (3) R1 (4) R1

R1 R1 R2 R2

56. Light Velocity in diamond is ( µ = 2.0)

(1) 60 x 1010 cm/sec.

(2) 2 x 1010 cm/sec.

(3) 3 x 1010 cm/sec.

(4) 1.5 x 1010 cm/sec.

57. If Arsenic is dopped to silicon then its conductivity :

(1) becomes zero

(2) unchanged

(3) increases

(4) decreases


58. Two condensers of c and 2c capacity are connected in parallel and these are charged

upto v volt. If the battery is removed and dielectric medium of k constant is put between

the plates, then the potential at each condenser is :

(1) v (2) 2+ k (3) 2v (4) 3v

k + 2 3v k + 2 k+2



59. Equation of wave is y = 15 x 10-2 sin (300t – 100x) where x in meter and t in sec. the

wave velocity is :

(1) 1.5 m/sec. (2) 3 m/sec. (3) 0.5 m/sec. (4) 1 m/sec.

60. Escape velocity at the surface of earth is 11 km/sec., if radius of earth is doubled then

the escape velocity will be :

(1) 15.5 km/sec. (2) 5.5 km/sec. (3) 11 km/sec. (4) 22 km/sec.



61. Kinetic energies of two bodies of 1 kg. and 4 kg. are same, the ratio of their

momentum is :

(1) 1 : 16 (2) 1 : 2 (3) √2 : 1 (4) 4 : 1

62. A body takes 5 minute to cool from 300

cool from 600

(1) 40 minute (2) 10 minute (3) 30 minute (4) 20 minute



63. AC voltage is v = 200 sin 300t and if R = 10Ω and L = 800 mH, peak value of current

is :

(1) 1.83 (2) 1.5 (3) 2.0 (4) .83

64. Two charges + q and – q are placed at r distance from each other. If one of the charge

is stationary and other is rotated around, work done is one circle is :

(1) kq2 (2) kq (3) kq2

r2

r r

65. Peak value of AC current is 4√2, RMS current is :



(1) 2√2 (2) 8 (3) 4 √2 (4) 4


66. A monoatomic gas is compressed to its 1/8th volume adiabatically (r = 5/3), the

pressure will be :

(1) 32 times (2) 40 times (3) 8 times (4) 24 times

3 5


67. A condenser is charged and then battery is removed, a dielectric plate is put between

the plates of condenser, then correct statement is :

(1) Q constant V and U decreases

(2) Q constant V increases U decreases

(3) Q increases V decreases U increases

(4) None

68. The MI of a disc wrt its diameter is I, MI wrt. And axis passing through its

circumference and parallel to diameter is :

C to 300

C, if room temp. is 200

C to 500

C :

C. How much time it will take to

(4) zero

(1) 41 (2) 61 (3) 31 (4) 51

69. Length of two wires is 0.5 m and distance between the wires is 1 m. If 1 amp.

current is passed in the wires, force per unit length between the wires is :

(1) 4 x 10-7 (2) 2 x 10-7 (3) 10-7 (4) None

70. Relation between internal energy U and absolute temp. T of an ideal gas as kinetic

theory of gases, is :

(1) U does not depends upon T

(2) U ∝ T2

(3) U ∝ T

(4) U ∝ √T

71. Light wavelength in a glass is 6000Ǻ and refractive index is 1.5, the wavelength

of light is :

(1) 12000 Ǻ (2) 4000 Ǻ (3) 9000 Ǻ (4) 6000 Ǻ

72. Two sources of sound A & B placed near to each other produces 4 beats per second.

If A is loaded with wax then 2 beats/sec. are produced. If the frequency of A is 256 Hz,

The frequency of B will be :

(1) 262 (2) 260 (3) 252 (4) 250

73.Work done to rotate a dipole by a 900

(1) – PE (2) – 2 PE (3) 2PE (4) PE

74. Zener diode may be used as a :

(1) rectifier (2) oscillator (3) amplifier (4) voltage regulator

75. Wavelength of first line of Balamer series is 6561 Ǻ then the wavelength of second

line of Balmer series will be :

(1) 3500 Ǻ (2) 4860 Ǻ (3) 6561 Ǻ (4) 2430 Ǻ

angle, is :

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