Manipal Academy of Higher Education Manipal Entrance Test Physics Model Question Paper with 50 questions for MET B. Tech Entrance Exam.

Ques. In photoelectric effect if the intensity of light is doubled then maximum kinetic energy of photoelectrons will become
(a) Double
(b) Half
(c) Four time
(d) No change
Ans. (d)

Ques. When a uniform wire of radius r is stretched by a 2 kg weight, the increase in its length is 2.00 mm. If the radius of the wire is r/2 and other conditions remaining the same, the increase in its length is
(a) 2.00 mm
(b) 4.00 mm
(c) 6.00 mm
(d) 8.00 mm
Ans. (d)

Ques. The slopes of plate characteristics and mutual characteristics of a triode valve are 0.02 mA/V and 100 mA/V respectively. The amplification of the value will be
(a) 25
(b) 50
(c) 100
(d) 12.5
Ans. (b)

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Ques. The Velocity of sound in hydrogen gas at 0^oC is 1260 m/s. If the ratio of densities of O₂ and H₂ is 16 : 1, then the velocity of sound in the mixture of H₂ and O₂ in the ratio 2:1, at the same temperature will be
(a) 314.4 m/s
(b) 414.4 m/s
(c) 514.4 m/s
(d) 727.4 m/s
Ans. (c)

Ques. Wavelength of light of frequency 100Hz
(a) 2 x 10⁶ m
(b) 3 x 10⁶ m
(c) 4 x 10⁶ m
(d) 5 x 10⁶ m
Ans. (b)

Ques. The observed wavelength of light coming from a distant galaxy is found to be increased by 0.5% as compared with that coming from a terrestrial source. The galaxy is
(a) Stationary with respect to the earth
(b) Approaching the earth with velocity of light
(c) Receding from the earth with the velocity of light
(d) Receding from the earth with a velocity equal to 1.5 x 10⁶ m/s
Ans. (d)

Ques. The observed wavelength of light coming from a distant galaxy is found to be increased by 0.5% as compared with that coming from a terrestrial source. The galaxy is
(a) Stationary with respect to the earth
(b) Approaching the earth with velocity of light
(c) Receding from the earth with the velocity of light
(d) Receding from the earth with a velocity equal to 1.5 x 10⁶ m/s
Ans. (d)

Ques. If there are N nuclear particles in a nucleus of radius R, then the number of nuclear particle in radius 3R will be
(a) N
(b) 2N
(c) 27N
(d) 2^1/3 N
Ans. (c)

Ques. A heat engine operates between 2100K and 700K. Its actual efficiency is 40%. What percentage of its maximum possible efficiency is this
(a) 33.33 %
(b) 66.67 %
(c) 60 %
(d) 40 %
Ans. (c)

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Ques. A thin rod of length f/3 lies along the axis of a concave mirror of focal length f. One end of its image touches an end of the rod. The length of the image is
(a) f
(b) ½ f
(c) 2f
(d) ¼ f
Ans. (d)

Ques. The current changes in an inductances coil of 100mH from 100mA to zero in 2 millisecond. The e.m.f. induced in the coil will be
(a) –5 V
(b) 5 V
(c) –50 V
(d) 50 V
Ans. (b)

Ques. The rms speed of the molecules of a gas at a pressure 10⁵ Pa and temperature 0°C is 0.5 km/sec. If the pressure is kept constant but temperature is raised to 819°C, the velocity will become
(a) 1.5 km/s
(b) 2 km/s
(c) 5 km/s
(d) 1 km/s
Ans. (d)

Ques. A film projector magnifies a film on the screen. Area of film is 100 square centimeter. If linear magnification is 4, then area of magnified film on screen will be
(a) 1600 cm²
(b) 800 cm²
(c) 400 cm²
(d) 200 cm²
Ans. (a)

Ques. The time interval between exciting an atom and emission of energy from it is 10^–8 second. The uncertainty in the energy of emitted photon will be
(a) 10^–36 Joule
(b) 10^–28 Joule
(c) 1.05 x 10^–26 Joule
(d) 10^–13 Joule
Ans. (c)

Ques. Charge density for intrinsic semiconductor will be
(a) 15 x 10¹⁷ m^–3
(b) 1.6 x 10¹⁶ m^–3
(c) 15 x 10¹³ m^–3
(d) 15 x 10¹⁴ m^–3
Ans. (b)

Ques. Monochromatic light is
(a) A light of different wavelengths but of same colour
(b) A light of two wavelengths of different colours
(c) A ray of light
(d) A light of single wavelength
Ans. (d)

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Ques. A wire coil carries the current i. The potential energy of the coil does not depend upon
(a) The value of i
(b) The number of turns in the coil
(c) Whether the coil has an iron core or not
(d) The resistance of the coil
Ans. (d)

Ques. The process of fission is responsible for the release of energy
(a) From the sun
(b) In hydrogen Bomb
(c) In atomic bomb
(d) In chemical reaction
Ans. (c)

Ques. Node in longitudinal stationary waves is that point where
(a) Changes in pressure are maximum
(b) Pressure is maximum
(c) Pressure is minimum
(d) Change s in pressure are minimum
Ans. (a)

Ques. There are two conductors of different size and each carrying equal amount of positive charge on it. The potential difference between them is
(a) Zero
(b) Non-zero
(c) > 0
(d) Ans. (b)

Ques. A source of sound is emitting sound waves in all directions in a absorptionless medium. This source is at distance of 4 m and 16 m from points x and y respectively. The ratio amplitudes of waves at points x and y will be
(a) 4:1
(b) 1:4
(c) 2:4
(d) 4:2
Ans. (a)

Ques. In the circuit shown in figure, the reading of voltmeter is

(a) 1.33 V
(b) 0.8 V
(c) 2.0 V
(d) 1.6 V
Ans. (a)

Ques. Temperature of water at the surface of lake is –20^oC. Then temperature of water just below the lower surface of ice layer is
(a) – 4°C
(b) 0°C
(c) 4°C
(d) – 20°C
Ans. (b)

Ques. The cause of velocity in gases is
(a) Cohesive force
(b) Adhesive force
(c) Diffusion
(d) Conductivity
Ans. (c)

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Ques. In an intrinsic semiconductor
(a) Only electrons are responsible for flow of current
(b) Both holes and electrons carry current
(c) Both holes and electrons carry current with electrons being majority carriers
(d) Only holes are responsible for flow of current
Ans. (b)

Ques. The maximum energy of photo-electrons emitted in a photo cell is 2 eV. For no photo-electrons to reach the anode, the stopping potential should be
(a) 2V
(b) –2V
(c) 4V
(d) –4V
Ans. (b)

Ques. The breaking stress of a material is 10⁹ pascal. If the density of material is 3 x 10³ Kg/m³. The minimum length of the wire for which it breaks under its own weight will be
(a) 3.4 m
(b) 3.4 x 10⁴ m
(c) 3.4 x 10⁵ m
(d) 3.4 x 10³ m
Ans. (b)

Ques. The fraction of Cs¹³⁷ atoms decaying in one year is 1/27. Its mean life will be
(a) 27 years
(b) 18.2 years
(c) 13.5 years
(d) 0.037 years
Ans. (a)

Ques. Monochromatic green light of wavelength 5 x 10^–7 m illuminates a pair of slits 1 mm apart. The separation of bright lines on the interference pattern formed on a screen 2 m away is
(a) 0.25 mm
(b) 0.1 mm
(c) 1.0 mm
(d) 0.01 mm
Ans. (c)

Ques. In electromagnetic induction, the induced charge in a coil is independent of
(a) Change in the flux
(b) Time
(c) Resistance in the circuit
(d) None of these
Ans. (b)

Ques. Which of the following waves have the maximum wavelength?
(a) X-rays
(b) I.R. rays
(c) UV rays
(d) Radio waves
Ans. (d)

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Ques. The work function for a metal is 4 eV. To eject the photo-electrons with zero velocity, the wavelength of the incident light should be
(a) 2700 Å
(b) 1700 Å
(c) 5900 Å
(d) 3125 Å
Ans. (d)

Ques. The refractive indices of glass and water w.r.t. air are 3/2 and 4/3 respectively. The refractive index of glass w.r.t. water will be
(a) 8/9
(b) 9/8
(c) 7/6
(d) None of these
Ans. (b)

Ques. In a cathode ray discharge tube the pressure is of the order of
(a) 76 cm of mercury
(b) 10^–6 cm of mercury
(c) 1 cm of mercury
(d) 10^–3 cm of mercury
Ans. (d)

Ques. Power factor in a series L-C-R resonant circuit is
(a) 0.5
(b) 1
(c) 0.707
(d) 0
Ans. (b)

Ques. The rms speed of smoke particles of mass 500 x 10^–19 kg at NTP will be
(a) 0.15 cm/s
(b) 1.5 x 10^–3 m/s
(c) 11.5 x 10^–3 m/s
(d) 15 x 10^–3 m/s
Ans. (d)

Ques. N identical spherical drops charged to the same potential V are combined to form a big drop. The potential of the new drop will be
(a) V
(b) V/N
(c) V x N
(d) V x N^2/3
Ans. (d)

Ques. A body of mass 20 Kg. is at rest. A force of 5 Newton is applied on it. The work done in fist second will be
(a) 5/8 Joule
(b) 8/5 Joule
(c) 5/3 Joule
(d) 4/5 Joule
Ans. (a)

Ques. For measuring very small e.m.f. with the help of potentiometer
(a) Its length must be small
(b) V_AB must be large
(c) x must small
(d) R must be small
Ans. (c)

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Ques. What will be the colour of sky as seen from the earth, if there were no atmosphere?
(a) Black
(b) Blue
(c) Orange
(d) Red
Ans. (b)

Ques. Two magnetic lines of force cut each other
(a) Near the poles
(b) At neutral point
(c) Never cut
(d) According to the position of magnet
Ans. (c)

Ques. The cause of surface tension is
(a) Intermolecular forces
(b) Interatomic forces
(c) Viscous forces
(d) Gravitational forces
Ans. (a)

Ques. The magnifying power of a telescope can be increased by
(a) Increasing focal length of the system
(b) Fitting eye piece of high power
(c) Fitting eye piece of low power
(d) Increasing the distance of objects
Ans. (b)

Ques. The cut-in voltage for silicon diode is approximately
(a) 0.2 V
(b) 0.6 V
(c) 1.1 V
(d) 1.4 V
Ans. (b)

Ques. The part of a transistor which is heavily doped to produce a large number of majority carriers, is
(a) Base
(b) Emitter
(c) Collector
(d) None of these
Ans. (b)

Ques. In a Millikan’s oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^–19 C. The number of excess electrons on the drop is
(a) 3.9
(b) 4
(c) 4.2
(d) 6
Ans. (b)

Ques. A railway compartment is lit up by thirteen lamps each taking 2.1 amp. At 15 volt. How much heat is generated per second in each lamp
(a) 4.35 cal
(b) 5.73 cal
(c) 7.5 cal
(d) 2.5 cal
Ans. (c)

Ques. The focal lengths of the objective and the eyepiece of a telescope are 50 cm and 5 cm respectively. If the telescope is focused for distinct vision on a scale distant   2 m from its objective, then its magnifying power will be
(a) – 2
(b) – 4
(c) + 8
(d) – 8
Ans. (a)

Ques. Coherent sources produced in Fresnel’s biprism
(a) Are virtual
(b) Are real
(c) Are virtual or real depending on distance of slit from biprism
(d) None of these
Ans. (a)

Ques. The volume of soap bubble is V and its radius is r. If the excess pressure inside it is P then PV will be proportional to
(a) r
(b) r²
(c) r³
(d) r⁴
Ans. (b)

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