JEE Main Physics MCQs - Part 8

Questions 71-80 of 100

71. If the frequency of incident light on a metal surface is doubled, the stopping potential becomes:

72. Which series of the hydrogen spectrum lies in the ultraviolet region?

73. The activity of a radioactive sample is Râ‚€ at t=0. At t = T_half, the activity becomes:

74. In an n-type semiconductor, the majority charge carriers are:

75. The focal length of a biconvex lens of refractive index 1.5 and radii of curvature R₁ = R and R₂ = -R is:

76. The critical angle for a medium of refractive index √2 is:

77. In a single slit diffraction experiment, the width of the central maximum is proportional to:

78. Unpolarized light of intensity Iâ‚€ passes through a polarizer. The intensity of the transmitted light is:

79. The refractive index of a medium is 1.5. The speed of light in this medium is (c = 3 * 10⁸ m/s):

80. According to Huygens' principle, every point on a wavefront acts as a source of:

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