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Rajasthan Pre-Engineering Test (RPET) Solved question papers

1. The amplification factors of two triode values are 40 and their plate
resistances are 2 kΩΩ resp. If both are used of 4 kΩΩ in the outer circuit, the
ratio of voltage gain will be :
(1) 10 (2) 4/9 (3) 4/3 (4) 16/3
2. Fundamental frequency of an open pipe is :
(1) 15 Hz (2) 20 Hz (3) 30 Hz (4) 10 Hz
3. If the capacity of Tarapore atomic power station is 200 Mωω. The energy
produced by this reactor in one day will be :
(1) 200 mega watt (2) 200 J (3) 1729 x 1010J (4) None
4. The half life of a radioactive sample is 3.8, the time after which 1/20th part of
the sample will left will be:
(1) 66 days (2) 16.5 days (3) 18 days (4) 13.5 days
5. A hollow sphere filled with water and hole in the bottom when oscillates the
time period will:
(1) decrease (2) increase (3) first increase then decrease (4) remains
constant
6. In AC circuit at the time of resonance :
(1) voltage at C and R not in same phase
(2) voltage at L and C in same phase
(3) impedance is ωL - 1___
Cω
(4) impedance is R
7. A wave enters from air into water then what is unchanged :
(1) wavelength (2) velocity (3) amplitude (4) frequency
8. In wattles current phase difference between current and voltage is :
(1) π/4 (2) π/2 (3) π (4) zero
9. When the light of wavelength 2537 Å is made to incident over the surface of
copper slab, the stopping voltage is 0.24 volt obtained. The there shold
frequency for copper will be :
(1) 1.414 x 1014 Hz (2) 2.248 x 1015 Hz
(3) 1.124 x 1015 Hz (4) None
10. The magnetic field produced at point 0 of the wire shown in figure will be :
i
→ R →
O
(1) zero (2) µ0i (3) µ0i (4) µ0i
4r 2r 4πr
11. The V rms of gas molecules is 300 m/sec. If its absolute temperature is reduced
to half and molecular weight is doubled the V rms will become:
(1) 75 m/sec. (2) 150 m/sec. (3) 300 m/sec. (4) 600 m/sec.
12. The density of a rubber pipe is 1.5 x 103 kg/m3 and Young coefficient of
elasticity is 5 x 106 N/m2 when it is suspend from earth surface the length is 8
m., the increase in its length due to its own weight will be :
(1) 9.6 x 10-5m (2) 9.6 x 103
m
(3) 19.2x10-2m. (4) 9.6 m.
13. Surface tension is due to :
(1) cohesive molecular forces
(2) gravitational forces
(3) nuclear forces
(4) electrical forces
14. The time period of a pendulum in stationary lift is T, if lift starts moving in
the downward direction the time period will :
(1) decrease (2) increase (3) unchanged (4) uncertain
15. An engine of a car can produce an acceleration of 4 m/sec.2. If this car is
dragging another car of same mass than the acceleration produced by the
engine of the car will be:
(1) 1 m/sec.2
(2) 2 m/sec.2
(3) 8 m/sec.2
(4) 4 m/sec.2
2
16. If a stone of mass m is rotated in a vertical circular path of radius 1 meter,
the critical velocity will be :
(1) 12.64 m/sec. (2) 3.16 m/sec. (3) 6.32 m/sec. (4) 9.48 m/sec.
17. If the MI of a disc about the tangent in its plane is I, its MI about the tangent
perpendicular to the plane will be :
(1) 5 I (2) 3 I (3) 3 I (4) 6 I
4 2 4 5
18. Photo electric effect is based on :
(1) Davisson-Germer experiment
(2) Maxwell,s theory
(3) Einstein theory
(4) Plank’s constant

RPET Syllabus
Physics:
Measurement of Units, Dynamics of Particles, Dynamics of a system of Particles, Simple Harmonic Motion, International Force, Kinetic Theory of Gases, First Law of Thermodynamics, Radiation, Wave Motion, Nature of Light, Electrostatics, Electric Circuit, Magnetic Field, Alternating Current Circuit, Modern Physics, Electronics.

Chemistry:
Development of Classical Model of an Atom, The Periodic Law, The Theory of Chemical Bonding, Chemical Equilibrium & Ionic Equillibria, Chemical Kinetics, Acid & Base, Metals, S-Block Elements, d-Block Elements.

Mathematics:
Algebra, Matrices, Trigonometry, Co-ordination Geometry, Calculus, Vector, Probability.

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