Author: admin

86. A photon has energy of 3.1 × 10−19 J. Its wavelength (in Å) is ________ (round off to one decimal place). (Consider Planck’s constant, J s; speed of light […]

85. A ball is thrown vertically upward with a speed of 19.6 m/s. The value of acceleration due to gravity at that place is 9.8 m/s². The maximum height (in […]

84. Consider that M, L and T indicate mass, length and time, respectively. If is the dimensional formula for the physical quantity Torque, then the value of is ________. (in […]

83. If a light beam (solid arrow in the shown figure) is entering from Air medium to Glass medium (having refractive index of 1.5), then while entering (A) speed of […]

82. The capacitance of a parallel plate capacitor will get doubled if (A) the area of each plate is doubled (B) the area of each plate is halved (C) the […]

81. If a simple pendulum has length and time period , then a pendulum of length will have a time period of Time Period of a Simple Pendulum When Its […]

80. Consider a block of mass ‘m’ hanging using a string and pulley arrangement, as shown in the figure. The weight ‘mg’ and tension ‘T’ are working on the block […]

79. A bat emitting ultrasound at 50 kHz is flying directly towards a solid wall with a speed of 3 ms–1. If the speed of sound in air is 330 […]

78. A nuclear power plant generates 1000 Megawatts (MW) of electrical power and used half of its fuel supply in 5 years. The reactor uses 235U with 33% efficiency for […]

77. The axis of rotation of the earth makes an angle of 66.5o with the plane containing the Earth’s orbit around the Sun (called the plane of the ecliptic). If […]