Andhra Pradesh ECET Biotechnology Paper 2019
| Sr. No. | Question |
| 1 | Three vectors A,B and C satisfy the relation A.B=0. The vector A is parallel to
(a) B (b) C (c) B.C (d) BxC |
| 2 | If three vectors A,B and C are 12, 5 and 13 in magnitude such that C=A+B, then the angle between A and B is
(a) 60 degree (b) 90 degree (c) 120 degree (d) 30 degree |
| 3 | A stone dropped from a certain height, can reach the ground in 5 second. It is stopped after 3 seconds of its fall and then allowed to fall again. The time take by the stone to reach the ground for the remaining distance is
(a) 2 second (b) 6 second (c) 4 second (d) 1 second |
| 4 | The range of projectile fired at an angle of 15 degree is 50 meter. If it is fired with the same speed at an angle of 45 degree, its range will be
(a) 25 meter (b) 37 meter (c) 50 meter (d) 100 meter |
| 5 | A freely falling body acquires a velocity ‘v’ m/s in falling through a distance of 80 meter. How much further distance should it fall, so as to acquire a velocity of ‘2v’ m/s ? (Take g= 10 meter per square second)
(a) 240 meter (b) 200 meter (c) 400 meter (d) 280 meter |
| 6 | A block is projected along a rough horizontal road with a speed of 10 m/s. If the coefficient of Kinetic friction is 0.10, how far will it travel before coming to rest?
(a) 50 m (b) 60 m (c) 40 m (d) 10 m |
| 7 | In a factory it is desired to lift 2000 kg of metal through a distance of 12 m in 1 minute. The minimum horse power of the engine to be used is
(a) 3.5 (b) 5.3 (c) 4.3 (d) 5.8 |
| 8 | Energy harnessed from flowing water is called __________ energy.
(a) Hydel (b) Solar (c) Tidal (d) Geothermal |
| 9 | When a particle executing simple harmonic motion passes through the mean position, it has
(a) Minimum K.E and maximum P.E (b) Maximum K.E and maximum P.E (c) Maximum K.E and minimum P.E (d) Minimum K.E and minimum P.E |
| 10 | A particle of mass 200 g executes a simple harmonic motion. The restoring force is provided by a spring of spring constant 80 N/m. The time period is
(a) 0.2 s (b) 0.41 s (c) 0.31 s (d) 0.5 s |
| 11 | The temperature at which the speed of sound will be double of its value at zero degree Celsius is
(a) 819 degree Celsius (b) 850 degree Celsius (c) 919 degree Celsius (d) 900 degree Celsius |
| 12 | If the source of sound moves towards an observer, then
(a) The frequency of the source is increased (b) The velocity of sound in the medium is increased (c) The wavelength of sound in the medium towards the observer is decreased (d) The amplitude of vibration of the particles is increased |
| 13 | A cinema hall has a volume of 7500 cubic meter. The total absorption in the hall if the reverberation time of 1.5 second is to be maintained is
(a) 800 OWU (b) 925 OWU (c) 950 OWU (d) 825 OWU |
| 14 | One mole of oxygen is heated at constant pressure starting at zero degree Celsius. The heat energy that must be supplied to the gas to double its volume is
(a) 2.5 x 273 x R (b) 3.5 x 273 x R (c) 2.5 X 546 x R (d) 3.5 X 546 x R |
| 15 | A vessel contains a gas at a temperature of 27 degree Celsius and a pressure of 20 atm. If one half of the gas is released and the temperature of the remaining gas is raised by 50 degree Celsius, the new pressure will be
(a) 12.24 atm (b) 11.67 atm (c) 13.79 atm (d) 11 atm |
| 16 | In all reversible processes entropy of the system
(a) Decreases (b) Increases (c) Remains constant (d) Remains zero |
| 17 | If one mole of a monatomic gas (‘Y’=5/3) is mixed with one mole of a diatomic gas (‘Y’=7/5), the value of ‘Y’ for the mixture is
(a) 1.40 (b) 1.50 (c) 1.53 (d) 3.07 |
| 18 | A superconducting material exhibits
(a) Zero conductivity and complete diamagnetism (b) Zero resistivity and complete Para magnetism (c) Infinite conductivity and complete para magnetism (d) Zero resistivity and complete diamagnetism |
| 19 | The splitting of spectral lines in a strong magnetic field is called
(a) Stark effect (b) Pauli Exclusion Principle (c) Zeeman effect (d) Aufbau Principle |
| 20 | Bohr’s model can explain
(a) The spectrum of hydrogen atom only (b) The spectrum of hydrogen molecule (c) The solar spectrum (d) Spectrum of an atom or ion containing one electron only |
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