-
Eureka!!! A site for you! Providing you useful bits and pieces. Pass or even top the board -
Explore the Wonders of Earth! see, come and enjoy! have a glimpse of a hidden paradise, explore and experience nature's goodness -
Looking for dedicated LET/Civil Service Review Materials? Seek no more! We've got it for you!
Main » 2013 » October » 5 » Compiled Physics Problems Sets 1 and 2
5:37 PM Compiled Physics Problems Sets 1 and 2 |
-->S E T 1<-- 1. Fermi is a unit of... A. length B. mass C. time D. electric flux 2. The horizontal component of a force of 10 N inclined at 30° to the vertical is... A. 5 N B. 5√ 3 N C. 3 N D. 10/√ 3 N 3. The acceleration due to gravity on Mars is 3.7 m/s2. Compared with her mass and weight on the earth, an astronaut on Mars has... A. less mass and less weight B. more mass and more weight C. the same mass and less weight D. the same mass and more weight 4. To keep a vehicle moving at the speed v requires a force F. The power needed is... A. F.v B. (1/2)F.v2 C. F/v D. F/v2 5. When the velocity of a moving object is double D... A. its acceleration is doubled B. its momentum is doubled C. its kinetic energy is doubled D. its potential energy is doubled 6. The intermolecular potential is dependent on... A. the shape of the molecules only B. the molecular separation only C. both the shape and the molecular separation D. none of the above 7. A cable stretches by amount 'a' under a certain loa D. If it is replaced by a cable of the same material but half as long and half the diameter, the same load will stretch it by... A. a/4 B. a/2 C. a D. 2a 8. A certain person's heart beats 1.2 times per second and pumps 1.0 x 10-4 m3 of blood per beat against an average pressure of 14 kP A. The power output of the heart is... A. 1.2 W B. 1.4 W C. 1.7 W D. 12 W 9. At which of the following temperatures would the molecules of a gas have twice the average kinetic energy they have at 20 °C A. 40 °C B. 80 °C C. 313 °C D. 586 °C 10. For monatomic gases, Cp/Cv is equal to... A. 1.67 B. R C. 1.67 R D. 1.5 R 11. Of the following the one that is a vector is... A. electric charge B. electric field C. electric energy D. potential difference 12. Diamagnetic materials are substances that... A. create a strong magnetic field B. are attracted by a magnetic field C. are repelled by a magnetic field D. have double magnetism 13. When a ferromagnet is inserted in a current-carrying loop, the magnetic fiel D... A. decreases slightly B. decreases greatly C. does not change D. increases greatly 14. A light ray passes through a prism with an angle of incidence θ, an angle of deviation δ and an angle of emergence ε. Minimum deviation occurs when... A. δ = θ B. δ = ε C. θ = ε D. δ = θ - ε 15. The image a camera forms on the film is... A. always real B. always virtual C. always erect D. sometimes inverted 16. If for the planets in solar system, r is the radius of the orbit and T is the periodic time, then the ratio r3/T2 is... A. 1 B. same for all planets C. more for farther planets D. less for farther planets 17. A boy swings from a rope 4.9 m long. His approximate period of oscillation is... A. 0.5 s B. 3.1 s C. 4.4 s D. 12 s 18. The primary effect when the source is moving is a change in... A. frequency B. amplitude C. wavelength D. both frequency and amplitude 19. The distance between a node and the immediate next antinode is... A. λ B. λ/2 C. λ/3 D. λ/4 20. A thin ring has mass M and radius R. Its moment of inertia about the axis passing through its center and perpendicular to its plane is... A. MR2 B. M2R C. M/R2 D. M2/R 21. Two satellites have periods P1 and P2, respectively. Their heights above the surface of the earth are h1 and h2, respectively. If h1 > h2, then... A. P1 > P2 B. P1 = P2 C. P1 < P2 D. P12 > P22 22. A projectile is thrown in the direction making an angle θ with the horizontal. The projectile attains maximum height for θ equal to... A. 0 B. π/4 C. π/2 D. π 23. A Carnot engine operates between 800K and 200K. If it absorbs 8 kJ of heat in each cycle, the work done by it per cycle is... A. 1 kJ B. 2 kJ C. 2.7 kJ D. 6 kJ 24. In a uniform segment of a circuit the current is proportional to the... A. density of the segment B. resistance of the segment C. volume of the segment D. potential difference at its ends 25. To charge a secondary cell, what is needed is... A. a D. C. current B. an A. C. current C. fresh electrolyte D. heating 26. Two parallel wires carry current in the same direction,... A. they attract each other B. they repel each other C. they neither attract nor repel D. they attract or repel depending on current type 27. If the maximum value of the induced e.m.f. is Vm and maximum r.m.s. current is √ 2 ampere for an A. C. circuit with resistance R, then the value of Vm in volt is equal to... A. 2R B. R C. 1/R D. √ 2/R 28. The wavelength of light plays no role in... A. interference B. diffraction C. resolving power D. polarization 29. The value of the stopping potential depends on... A. the intensity of light B. the frequency of light C. the metal surface area D. the charge on the electron 30. The only atom which has no neutron in the nucleus is... A. hydrogen B. helium C. oxygen D. polonium -->S E T 2<-- 1. In a tug-of-war match, one team is pulling with a force of 500 N. If they are exactly balanced by the other team, then the tension in the rope is... A. 0 B. 250 N C. 500 N D. 1000 N 2. The time taken by the light to travel from Sun to earth is approximately... A. 8 seconds B. 8 minutes C. 18 seconds D. 18 minutes 3. A charge q is placed at the centre of the line joining two equal charges Q. The system of the three charges will be in equilibrium if q is equal to... A. -(Q/2) B. -(Q/4) C. +(Q/4) D. +(Q/2) 4. The velocity of sound in vacuum is 320 m/s. A pipe closed at one end has a length 1m. Neglecting end corrections, the air column in the pipe can resonate for sound of frequency which is not equal to... A. 80 Hz B. 240 Hz C. 320 Hz D. 400 Hz 5. The thermodynamic coordinate that remains constant during an adiabatic process is... A. temperature B. pressure C. density D. entropy 6. is not contained in the nucleus of an atom... A. proton B. electron C. neutron D. meson 7. As an airplane climbs... A. its mass decreases B. its mass increases C. its weight decreases D. its weight increases 8. The unit of the force constant is... A. Nm B. Nm2 C. Nm-2 D. Nm-1 9. Brownian motion increases as... A. the particle size increases B. the particle size decreases C. the viscosity of the medium increases D. the temperature decreases. 10. Young's modulus is associated with... A. volume elasticity B. rigidity C. shear elasticity D. tensile elasticity 11. The force of adhesion is greater than the force of cohesion. This means that the angle of contact (θ) is equal to... A. 180° B. 120° C. 90° D. 45° 12. The temperature of an object is raised by 50° C. This is equivalent to an increase in its absolute temperature of... A. 50 K B. 323 K C. 223 K D. 82 K 13. The total electric flux is... A. always positive B. always negative C. always zero D. none of the above 14. If the field lines are evenly spaced, the field is... A. uniform B. zero C. strong D. weak 15. Relative to its object, a real image formed by a lens is always... A. erect B. inverted C. smaller D. larger 16. The highest proportion of gas in the Sun is that of... A. hydrogen B. helium C. carbon dioxide D. carbon monoxide 17. The product of the period and frequency of a harmonic oscillation is always equal to... A. 1 B. π C. 2π D. A 18. A direct result of superposition of waves is... A. resonance B. a wavefront C. a progressive wave D. beating 19. In the absence of external force the velocity of the center of mass of a system of particles is... A. zero B. constant C. maximum D. minimum 20. Three particles of masses 1 kg, 2 kg and 1 kg are at the points whose position vectors are i + j, 2i - j and 3i + j, respectively. The position vector of their centre of mass is... A. (6i + j)/4 B. 2i C. (6i + j)/3 D. 8i 21. For an object above the earth's surface, if the distance of the object from earth's centre is 'd', then the acceleration due to gravity is proportional to... A. d B. d2 C. 1/d D. 1/d2 22. A perfectly reversible process... A. exists B. does not exist but is possible C. is impossible D. involves intermediate inequilibrium states 23. The unit of resistance is... A. volt/second B. ampere/second C. volt.ampere D. volt/ampere 24. The unit of magnetic flux density is... A. weber B. tesla C. henry D. faraday 25. The power factor of a circuit is equal to... A. RZ B. R/Z C. XL/Z D. XL/Z 26. Ozone layer absorbs all electromagnetic radiations having wavelength... A. smaller than 3 x 10-7 m B. smaller than 3 x 10-8 m C. greater than 3 x 10-7 m D. greater than 3 x 10-8 m 27. Stationary waves are produced by... A. interference B. diffraction C. polarization D. refraction 28. According to Planck's quantum theory, the emission of energy... A. is continuous B. is discontinuous C. does not depend on wavelength D. does not depend on frequency 29. When an electron jumps from an orbit of higher energy E2 to the one with lower energy E1, the frequency of the electromagnetic radiation emitted depends on... A. E2 B. E1 C. E1 + E2 D. E2 - E1 30. After 10 years 75 g of an original sample of 100 g of a certain radioactive element has decaye D. The half-life of the isotope is... A. 5 years B. 7.5 years C. 20 years D. 40 years |
|
|
| Total comments: 0 | |
Site Counter
______________________________
Total online: 1
Guests: 1
Users: 0
