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96. The energy of an electron in the ground state of hydrogen is 13.6 eV. The energy required to excite it to the first excited state is ________. Energy Required […]

95. Charges are placed at , nm, and nm. The force between two charges separated by 2 nm is 2 pN. Find the magnitude of the force on the middle […]

94. A microscope objective has a linear magnification of 10. To achieve a final magnification of 100, the angular magnification of the eyepiece should be ________. Compound Microscope Magnification – […]

93. Two particles each of mass 20 g are involved in a one-dimensional elastic collision. The first particle moves at 10 m s⁻¹ while the second is initially at rest. […]

92. The truth table of a logic gate is: Input A Input B Output 0 0 1 0 1 1 1 1 0 Find the output for the input (1, […]

91. Represent the gravitational potential energy V between two bodies of mass 1012 kg each at distance R, such that Newton’s law remains valid. (A) V = −(G/R) × 1024 […]

90. Which of the following is(are) CORRECT? (A) Light has wave nature only (B) Light can have both wave and particle nature (C) Photoelectric effect shows that light can behave […]

89. Consider monoatomic ideal gas molecules of mass in thermal equilibrium at temperature . Which one of the following equations is correct? (the angular brackets denote average, 𝑘𝐵 is Boltzmann […]

88. A spherical particle moves in a medium with velocity v = v0 exp (−6πXrt / m) The dimensions of  X are: (A) MLT⁻¹ (B) M⁻¹LT (C) ML⁻¹T⁻¹ (D) Dimensionless […]

87. For an ideal gas at room temperature, choose the CORRECT representation(s) of Boyle’s Law. (P = Pressure, V = Volume, T = Temperature) (A) only (i) (B) both (ii) […]