General Physics MCQs

1. Three identical balls wit h charges 12 x10‘12 C, 8 x1012 C, and -5 x10'12 C, respectively are brought in contact with each other and then separated. What is the correct number of electrons in excess or def‌icit on each ball after the contact?

2. A snowball with a weight of 1.50 kg is shot upward at a 30° angle to the horizontal. If the initial speed is 30 m/s. then what is the change in the gravitational potential energy of the snowball—Earth system. as the snowball moves from the launch point to the point of maximum height? What will be that maximum height?

3. If the mass of a vehicle is 1800 kg, then what is the work required to be done for increasing the velocity of the vehicle from 60 km/h to 120 km/h?

4. Which of the following options is the correct number of the electric lines of force that originates from a 1 C charge?

5. Which of the following laws states that the algebraic sum of the products of resistance and current in each part of any closed circuit is equal to the algebraic sum of the emf's in that closed circuit?

6. Which of the following statements correctly states the Law of Conservation of Mechanical Energy?

7. What is the approximate energy associated with big bang?

8. Consider that a sample of 238U92 is undergoing o—decay. Its half-life is 4.5 x109 years. Find the activity 0f 1 g sample of 238U92.

9. Which of the following options is the correct frequency band for FM broadcast in India?

10. Two parallel wires are placed at a distance of 10 cm apart. The length of each of these wires is 5 m and they carry equal currents along the same direction. Find the current through the conductors, if they experience a mutually attractive force of 4.9 x104 N.

11. An object is at a certain height above the ground. If the object's mass is 15 kg and its potential energy is 540 J. then at what height the object is with respect to the ground. (Consider the value of g =10 m/sz.)

12. A raindrop falls from a height of1 km. If the mass of this drop is 1.00 g and it hits the ground with a speed of 60 m/s. then what is the work done by the unknown resistive forces?

13. Consider that three charges -4 x10‘9C. +6 x10‘9C, and -8 x10‘9C are placed at the vertices of an equilateral triangle XYZ. The sides of the triangle are 40 cm each. If X1, Y1, 21 are the mid points of the sides of the triangle. then what is the work done in shifting the charges X. Y and Z to X1. Y1. 21. respectively?

14. What is the correct value of VCEq for the given network?

15. The height of a transmitting antenna located at the top ofa tower is 80m and that of a receiving antenna is 320m. If the radius of the earth is 6.4 x10'5 m. then what should be the maximum distance between them for the satisfactory communication in LOS mode?

16. What is the correct value of the temperature coeff‌icient, if the resistance of a field coil is 60 Q at 30°C and 80 Q at 90°C?

17. In accordance with the classical electromagnetic theory, what is the approximate initial frequency of the light emitted by the electron revolving around a proton in hydrogen atom?

18. Which of the following options is the approximate range of resistivity of the semiconductors?

19. Which of the following options is a device that is used for converting one form of energy into another?

20. types of wave has these characteristics? i) The wave travels in a straight line from transmitting antenna to the receiving antenna. ii) It is used for line-of-sight communication.

21. What is the bandwidth of video signal required for the transmission of pictures?

22. What is the correct value of the wavelength of the fourth spectral line (£51) in the Lyman series of the hydrogen spectrum?

23. If 0.8m is the distance between the two insulated charged spheres of charges 8.5 x10‘7 C each, then what is the force when the charges are doubled and the distance of separation among them is halved?

24. In a Young's experiment, 3 mm is the width of the fringes obtained with light having a wavelength of 9000 A. If the entire apparatus is immersed in a liquid of refractive index 1.33, then what is the fringe width?

25. The radius of the nucleus is smaller than the radius of an atom by which of the following factors?

26. Calculate the mass defect of Oxygen (atomic mass = 16, atomic number = 8) in MeV/cz.

27. In relation to spectral series, which of the following options correctly states the Brackett series? (Consider that A is the wavelength, R is Rydberg constant, and n may have integral values.)

28. If the least distance of distinct vision for a person is 50 cm, then what should be the focal length of the reading spectacles for that person?

29. Which of the following types of forces is experienced by a dipole that is placed in a uniform electric f‌ield with its axis parallel to the f‌ield?

30. What is the linear charge density, if an inf‌inite line charge produces a f‌ield of 8 x104 N C'1 at a distance of 1.8 cm?

31. Which of the following options correctly def‌ines the range (dT), if an antenna radiates electromagnetic waves from a height h? (Consider that R is the radius of the earth.)

32. If q is the charge given to a conductor and V is the potential developed in the conductor, then which of the following options correctly defines the capacitance?

33. Which of the following options is the correct definition of Ampere's Circuital Law?

34. Consider that a cyclist comes to a skidding stop in 20 m. How much work is done by the road on the cycle, if the force on the cycle due to the road is 300 N and is directly opposed to the motion?

35. What is the approximate value of ID for the diode in the given image?

36. Leo lifted a container of 25 kg from the ground and puts it on his head 1.6 meter above the ground. What is the work done on the container by Leo?

37. For a double convex lens, the radii of curvature of the faces are 20 cm and 30 cm. What is the refractive index of the glass, if its focal length is 24 cm?

38. For separating a hydrogen atom into a proton and an electron, 13.6 eV energy is required. What is the velocity of the electron in a hydrogen atom?

39. When 15 O resistance is connected across the galvanometer, its deflection falls from 60 divisions to 20 divisions. What is the correct value of the galvanometer resistance?

40. While undergoing beta decay, the half-life of tritium is 12.5 years. After 25 years, what fraction of a sample of pure tritium will be decayed?

41. A satellite with 10 kg weight is circling around the earth once every 2 hours. The radius of the orbit is 9000 km. What is the quantum number of the orbit of the satellite. assuming that Bohr's angular momentum postulate applies to the satellites?

42. How much time is required by the sun for taking a shift by 1° when viewed from the earth, if it is given that the earth takes 24 hours to rotate once about its axis?

43. In Newton's rings experiment, if the diameter of a certain order of a dark ring is four times that of the second ring, then what is the order of the ring?

44. Which of the following options could be the lowest temperature of mesosphere?

45. Which of the following options is the correct critical angle of a diamond?

46. Light falls on a spherical glass surface from a point source in air. It is given that n=1.5 for the spherical glass surface and the radius of curvature is 40 cm. At which of the following positions the image is formed. if the distance of the light source from the glass surface is 100 cm?

47. For a ray incident from a denser to rarer medium, what is the critical angle of incidence it?

48. The northern lights and the aurora occurs in which of the following layers of atmosphere?

49. what position of the image is formed by the lens combination?

50. If:{ is the wavelength of the signal, then what should be the minimum size of the antenna so that it properly senses the time variation of the signal?

51. Which of the following options is the correct value of the refractive index of water?

52. Which of the following types of biasing is used in Zener diode?

53. Which of the following statements is NOT correct about JFETs (Junction Field Effect Transistors)?

54. Which of the following options is/are intrinsic semiconductors?

55. The maximum load capacity (elevator and passengers) ofan elevator is 1600 kg. It is moving up with a constant speed of 1.8 m/s. What is the minimum power delivered by the motor to the elevator. if the frictional force opposing the motion is 4000 N?

56. Which of the following options is NOT a correct difference between the interference and diffraction?

57. Interference fringes are produced in Young‘s double slit experiment by using two coherent sources of intensity ratio of 49 :1. What is the correct ratio of maximum and minimum intensities?

58. Which of the following options is the correct unit of permittivity?

59. In the given image, what is the value of Vimx for the given Zener diode (in the 'on' state)?

60. What is the power of a lens if the value of its focal length is 0.8 m?

61. Find the current, if 8.25 x 1018 electrons flow through a given cross section in unit time.

62. Which of the following options is the correct composition of a fuse wire?

63. Ryan fires a bullet with a speed of 200 m/s on a soft plywood. The mass of the bullet is 50.0 g and the thickness of the plywood is 2.00 cm. What is the emergent speed of the bullet if it emerges with only 10% of its initial kinetic energy?

64. A current of 3A is carried by a copper wire having 10'6 m2 area of cross section. What is the correct value of average drift velocity, if the number of electrons per cubic metre is 9X10”?

65. Lisa is sitting in a parked car. She noticed Ryan approaching towards the car in the side view mirror of R = 2m. How fast the image of Ryan appears to move when he is 39m away?

66. Consider a parallel plate capacitor in which the plates are separated by 3.0 mm. The area of each of these plates is 120 cm2. A 450 V supply is used for Charging this capacitor. What is the correct value of electrostatic energy stored by the capacitor?

67. Suppose a plano — convex lens is placed on an optically f‌iat glass plate. The radius of the lens is 3m and the lens is illuminated by monochromatic light. What is the wavelength of the light used. if the radius of the 8”1 dark ring is 4.2mm?

68. What is the force on a conductor of the length 60 cm carrying a current of 5A which is placed perpendicular to a magnetic field of induction 4 x10'3 T?

69. Consider two slits that are 0.5 mm apart. These slits are illuminated by the light of wavelength 5000 A. What is the separation between the second bright fringe on both the sides of central maximum, if the screen is placed at 1 m distance from the slits?

70. Three parallel conductors X, Y, and Z are carrying currents as shown in the f‌igure. If the length of each of the conductor is 10 m, then what is the magnitude and direction of the resultant force on the conductor Y?

71. What is the correct wavelength range of the visible light?

72. What is the approximate value of maximum forward voltage for the visible-light LED?

73. For modulating a carrier frequency 0f1 MHz and peak voltage of 40 volts, 8 message signal with a frequency of 20 KHz and peak voltage 20 volts is used. What is the modulation index and the side bands produced?

74. Consider two wires of same material and same length. What is the ratio of their radii, if their resistances are 10 Q and 20 0, respectively?

75. When placed in a polarimeter, a 600 mm long tube containing 120 cc of sugar solution produces a rotation of 15°. What is the quantity of sugar contained in the solution. if the specific rotation is 60°?

76. Which of the following quantities is not scalar?

77. Nina runs up a staircase of 60 steps in 15 seconds. If Nina's weight is 48 kg and the height of each step is 15 cm, then what is Nina's power? Consider that 9: 10 [TI/$2.

78. Which types of spectrum is obtained when a pure green glass plate is placed in the path of white light?

79. In the given image, what is the level of output impedance for the given system?

80. In relation to extrinsic semiconductors, which two of the following options are the pentavalent dopants?

81. Which of the following options are the correct characteristics of electromagnetic waves?

82. Which of the following statements are correct about a nucleus?

83. Which are the correct differences between the vacuum tube devices and the semiconductor devices?

84. Which of the following flowing layers of atmosphere exist only during the day time?

85. Which two of the following options are biaxial crystals?

86. Which of the following statements are correct about the full wave bridge rectifier?

87. Which of the following statements are correct about the amplitude modulation?

88. Injured cartilage might heal more quickly if a treatment were discovered that would __________.

89. The angular size of the smallest features that a telescope can see is called the angular ________.

90. When we move around through space just a little bit, we are moving _____.

91. Slow moving vehicles must display ___________ emblem at the rear to warn of their low speed.

92. Solid-state storage is quickly replacing forms of _____ on small devices like the ipod.

93. Strictly speaking, the light that meets and passes through a pane of window glass _________.

94. The net charge on an energized capacitor is normally _________.|

95. The unit of electric potential or electromotive force is the _____. volt ohm ampere franklin

96. When it's winter in the united states, in argentina it is _____.

97. When we say charge is conserved, we mainly mean that charge can be _________.

98. The velocities of seismic waves traveling from earthquake foci ________.

99. When a projectile achieves escape speed from earth, it _______.

100. A water wave travels across a 42-meter wide pond in 7.0 seconds. the speed of the wave is _____.

101. The waves associated with relaxation or drowsiness are called _____ waves.

102. As __________________ decreases, then the frequency of waves increases.

103. A total completeness constraint is represented by _____.

104. To say that an atom is excited is to say it has boosted _________.

105. Henri becquerel and the curies found out that _____.

106. A 1 kg balloon at equilibrium in the air is buoyed up with a force of __________.

107. Fast-moving currents of air that occur above the friction layer are called _____.

108. Einstein's equivalence principle says that ______.

109. A point is ____ of an inch in height.

110. Accidentally breathing foreign particles into the lungs is called _______.

111. A magnifying glass widens the angle through which _________.

112. A step-up transformer _____ the voltage and _____ the current.

113. According to the authors, judgments of faith __________.

114. Machine data makes up for more than ___% of the data accumulated by organizations.

115. Magnetic domains are composed of clustered _________.

116. Noise-canceling devices such as jackhammer earphones make use of sound _______.

117. The flow rate of a liquid is _______.

118. The greeks studied charges using _____. gold copper magnetite amber

119. The minimum detectable sound for normal hearing is arbitrarily set at _____ decibels.

120. The two types electromagnetic waves transparent to our atmosphere are _______.

121. The unifying factor that unites different realms of spacetime is the _________.

122. This formula applies to ________________.

123. The quadriceps femoris is a knee __________ used to rise from a seated position.

124. When a parcel of air sinks in the atmosphere, there is usually _________.

125. Ultraviolet light that is not transmitted through a pane of glass is _______.

126. Capillary beds have precapillary ____________ at the junction of capillaries and the metarteriole.

127. An atom with z = 26 and a = 58 contains ________ protons and ________ neutrons.

128. As __________________ decreases, then light energy increases.

129. _____ is the property of increasing pitch that accompanies increases in the tones frequency.

130. A compass in a magnetic field will line up __________.

131. Stern observed all of the following results except _______ in his experiment.

132. Restless tectonic plates move (shift) between one and fifteen centimeters per __________.

133. The ________ respects the new conductor.

134. Very small organisms, like paramecia or protozoa, moving around in water __________.

135. When steam condenses into water, __________.

136. _____ are especially vulnerable to displaced aggression.

137. Ammeters should be connected ________ with the circuit being tested.

138. Jupiter is 317 times more massive than the earth. its gravitational attraction is _____ earth's.

139. One's weightlessness in space has most to do with _______.

140. It is typical for people in hypnotic trances to temporarily __________.

141. Pressure has an appreciable effect on the solubility of ________ in liquids.

142. Programs such as ____ support energy conservation for electronic devices.

143. Recycled energy is mainly _______.

144. Reflection and absorption by the atmosphere prevent some ____ from reaching earth's surface.

145. Regarding size radio waves have the _________ wavelength compared to the other types of ems.

146. Organisms that are poikilothermic _______.

147. The blueness of the daytime sky is due mostly to light _______.

148. Polycythemia results in _______.

149. The cosmic rays deflected most by earth's magnetic field are above the _________.

150. It is ____________ for motorcyclists to ride more than two abreast in a lane.

151. In considering proportions, acceleration is _______.

152. The preload is approximately the same as the ________.