A concave mirror (f = 15 cm) forms a real image 30 cm in front; object distance is A 10
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Chapter 15: Ray Optics and Optical Instruments (Set-4)
A plane mirror rotated by 10° causes reflected ray to rotate by A 5° B 10° C 20° D 40°
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During reflection at a plane surface, which quantity definitely remains unchanged A Direction B Intensity C Phase D Frequency Explanation
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Continue readingChapter 15: Ray Optics and Optical Instruments (Set-1)
In a plane mirror, the angle between incident ray and reflected ray equals A i − r B 2i C
Continue readingChapter 14: Maxwell’s Equations and Electromagnetic Waves (Set-4)
A spherical Gaussian surface encloses total charge +Q; if its radius is doubled, total electric flux through it becomes: A
Continue readingChapter 14: Maxwell’s Equations and Electromagnetic Waves (Set-5)
A closed surface encloses +2.0 μC charge; what is the total electric flux through the surface A 1.13×10⁵ Nm²/C B
Continue readingChapter 14: Maxwell’s Equations and Electromagnetic Waves (Set-3)
In vacuum with no charges, Gauss’s law implies which component of E for a plane wave is absent? A Longitudinal
Continue readingChapter 14: Maxwell’s Equations and Electromagnetic Waves (Set-2)
In a region with no free charge, Gauss’s law for electricity implies electric flux through any closed surface is: A
Continue readingChapter 14: Maxwell’s Equations and Electromagnetic Waves (Set-1)
Which Maxwell equation links electric flux through a closed surface to enclosed charge in integral form? A Faraday’s law B
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