AIPMT 2009 Prelims

189 Questions • 189 Minutes • 2009

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Q1
In the nuclear decay given below: (A, Z)X → (A, Z+1)Y → (A−4, Z−1)B* → (A−4, Z−1)B the particles emitted in the sequence are: [notation: (mass number, atomic number)]
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Q2
A thin circular ring of mass M and radius R is rotating in a horizontal plane about an axis vertical to its plane with a constant angular velocity ω. If two objects each of mass m be attached gently to the opposite ends of a diameter of the ring, the ring will then rotate with an angular velocity:
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Q3
In thermodynamic processes which of the following statements is not true?
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Q4
The number of photo electrons emitted for light of a frequency ν (higher than the threshold frequency ν₀) is proportional to:
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Q5
A simple pendulum performs simple harmonic motion about x = 0 with an amplitude a and time period T. The speed of the pendulum at x = a/2 will be:
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Q6
A body, under the action of a force F⃗ = 6î − 8ĵ + 10k̂, acquires an acceleration of 1 m/s². The mass of this body must be:
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Q7
If F⃗ is the force acting on a particle having position vector r⃗ and τ⃗ be the torque of this force about the origin, then:
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Q8
The two ends of a rod of length L and a uniform cross-sectional area A are kept at two temperatures T₁ and T₂ (T₁ > T₂). The rate of heat transfer, dQ/dt, through the rod in a steady state is given by:
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Q9
A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. It can detect a signal of wavelength:
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Q10
If the dimensions of a physical quantity are given by Mᵃ Lᵇ Tᶜ, then the physical quantity will be:
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Q11
A transistor is operated in common-emitter configuration at Vc = 2 V such that a change in the base current from 100 µA to 200 µA produces a change in the collector current from 5 mA to 10 mA. The current gain is:
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Q12
The mass of a lift is 2000 kg. When the tension in the supporting cable is 28000 N, then its acceleration is:
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Q13
Four identical thin rods each of mass M and length l, form a square frame. Moment of inertia of this frame about an axis through the centre of the square and perpendicular to its plane is :
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Q14
Each of the two strings of length 51.6 cm and 49.1 cm are tensioned separately by 20 N force. Mass per unit length of both the strings is same and equal to 1 g/m. When both the strings vibrate simultaneously the number of beats is:
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Q15
The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it. The resulting daughter is an:
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Q16
The Figure shows elliptical orbit of a planet m about the sun S. The shaded area SCD is twice the shaded area SAB. If t₁ is the time for the planet to move from C to D and t₂ is the time to move from A to B then:
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Q17
A black body at 227°C radiates heat at the rate of 7 cal/cm² s. At a temperature of 727°C, the rate of heat radiated in the same units will be:
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Q18
The driver of a car travelling with speed 30 m/sec towards a hill sounds a horn of frequency 600 Hz. If the velocity of sound in air is 330 m/s, the frequency of reflected sound as heard by driver is:
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Q19
A rectangular, a square, a circular and an elliptical loop, all in the (x−y) plane, are moving out of a uniform magnetic field with a constant velocity, v⃗ = v î. The magnetic field is directed along the negative z axis direction. The induced emf, during the passage of these loops, out of the field region, will not remain constant for:
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Q20
A galvanometer having a coil resistance of 60 Ω shows full scale deflection when a current of 1.0 amp passes through it. It can be converted into an ammeter to read currents upto 5.0 amp by:
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Paper Info
  • Exam: AIPMT Prelims
  • Year: 2009
  • Questions: 189
  • Duration: 189 mins
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